/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-programs/partial_mod_count_2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:49:11,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:49:11,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:49:11,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:49:11,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:49:11,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:49:11,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:49:11,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:49:11,231 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:49:11,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:49:11,239 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:49:11,241 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-04-01 02:49:11,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:49:11,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:49:11,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:49:11,278 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:49:11,314 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:49:11,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:49:11,315 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:49:11,315 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:49:11,316 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:49:11,316 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:49:11,316 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:49:11,316 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:49:11,316 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:49:11,316 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:49:11,317 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:49:11,317 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:49:11,318 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:49:11,318 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:49:11,318 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:49:11,318 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:49:11,318 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:49:11,318 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:49:11,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:49:11,319 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:49:11,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:49:11,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:49:11,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:49:11,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:49:11,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:49:11,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:49:11,320 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:49:11,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:49:11,320 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:49:11,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:49:11,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:49:11,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:49:11,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:49:11,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:49:11,321 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:49:11,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:49:11,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:49:11,322 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:49:11,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:49:11,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:49:11,322 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:49:11,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:49:11,545 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:49:11,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:49:11,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:49:11,572 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:49:11,572 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:49:11,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_2.c [2023-04-01 02:49:12,733 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:49:12,867 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:49:12,867 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_2.c [2023-04-01 02:49:12,872 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/338471d7b/48d02041e9b34512ba023d6af1be6204/FLAG6133792d2 [2023-04-01 02:49:12,882 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/338471d7b/48d02041e9b34512ba023d6af1be6204 [2023-04-01 02:49:12,884 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:49:12,885 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:49:12,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:49:12,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:49:12,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:49:12,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:49:12" (1/1) ... [2023-04-01 02:49:12,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71f7e77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:12, skipping insertion in model container [2023-04-01 02:49:12,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:49:12" (1/1) ... [2023-04-01 02:49:12,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:49:12,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:49:13,051 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_2.c[323,336] [2023-04-01 02:49:13,072 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:49:13,083 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:49:13,095 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_2.c[323,336] [2023-04-01 02:49:13,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:49:13,122 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:49:13,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:13 WrapperNode [2023-04-01 02:49:13,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:49:13,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:49:13,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:49:13,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:49:13,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:13" (1/1) ... [2023-04-01 02:49:13,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:13" (1/1) ... [2023-04-01 02:49:13,141 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:13" (1/1) ... [2023-04-01 02:49:13,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:13" (1/1) ... [2023-04-01 02:49:13,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:13" (1/1) ... [2023-04-01 02:49:13,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:13" (1/1) ... [2023-04-01 02:49:13,167 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:13" (1/1) ... [2023-04-01 02:49:13,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:13" (1/1) ... [2023-04-01 02:49:13,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:49:13,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:49:13,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:49:13,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:49:13,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:13" (1/1) ... [2023-04-01 02:49:13,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:49:13,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:13,206 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) [2023-04-01 02:49:13,229 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 [2023-04-01 02:49:13,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:49:13,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:49:13,246 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:49:13,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:49:13,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:49:13,246 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:49:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:49:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:49:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:49:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:49:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:49:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:49:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:49:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:49:13,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:49:13,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:49:13,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:49:13,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:49:13,314 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:49:13,316 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:49:13,504 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:49:13,555 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:49:13,556 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 02:49:13,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:49:13 BoogieIcfgContainer [2023-04-01 02:49:13,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:49:13,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:49:13,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:49:13,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:49:13,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:49:12" (1/3) ... [2023-04-01 02:49:13,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b6f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:49:13, skipping insertion in model container [2023-04-01 02:49:13,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:49:13" (2/3) ... [2023-04-01 02:49:13,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b6f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:49:13, skipping insertion in model container [2023-04-01 02:49:13,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:49:13" (3/3) ... [2023-04-01 02:49:13,565 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_2.c [2023-04-01 02:49:13,580 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:49:13,580 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:49:13,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:49:13,631 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@26191759, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:49:13,631 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:49:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:49:13,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 02:49:13,655 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:13,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:13,656 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:13,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:13,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1574602995, now seen corresponding path program 1 times [2023-04-01 02:49:13,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:13,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031485951] [2023-04-01 02:49:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:13,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:49:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:49:13,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:13,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031485951] [2023-04-01 02:49:13,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031485951] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:49:13,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:49:13,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 02:49:13,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52421292] [2023-04-01 02:49:13,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:49:13,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 02:49:13,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:14,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 02:49:14,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:49:14,021 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:49:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:14,109 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-04-01 02:49:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 02:49:14,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 02:49:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:14,121 INFO L225 Difference]: With dead ends: 34 [2023-04-01 02:49:14,122 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 02:49:14,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-01 02:49:14,127 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:14,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:49:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 02:49:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2023-04-01 02:49:14,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:49:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-04-01 02:49:14,165 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2023-04-01 02:49:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:14,166 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-04-01 02:49:14,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:49:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-04-01 02:49:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 02:49:14,167 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:14,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:14,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:49:14,168 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:14,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:14,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2023195770, now seen corresponding path program 1 times [2023-04-01 02:49:14,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:14,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828688088] [2023-04-01 02:49:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:14,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:14,187 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:14,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623046774] [2023-04-01 02:49:14,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:14,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:14,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:14,191 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) [2023-04-01 02:49:14,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:49:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:49:14,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:49:14,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:14,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:49:14,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:49:14,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:14,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828688088] [2023-04-01 02:49:14,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:14,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623046774] [2023-04-01 02:49:14,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623046774] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:49:14,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [901235445] [2023-04-01 02:49:14,406 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-01 02:49:14,406 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:14,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:14,415 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:14,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:14,540 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:14,769 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 48 for LOIs [2023-04-01 02:49:14,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:14,826 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:15,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [901235445] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:49:15,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:49:15,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 17 [2023-04-01 02:49:15,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520548189] [2023-04-01 02:49:15,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:49:15,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 02:49:15,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:15,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 02:49:15,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-04-01 02:49:15,217 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:49:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:16,146 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-04-01 02:49:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 02:49:16,146 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 02:49:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:16,147 INFO L225 Difference]: With dead ends: 25 [2023-04-01 02:49:16,147 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 02:49:16,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-01 02:49:16,150 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:16,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 4 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:49:16,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 02:49:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-04-01 02:49:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:49:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-01 02:49:16,161 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2023-04-01 02:49:16,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:16,161 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-01 02:49:16,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:49:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-01 02:49:16,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 02:49:16,162 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:16,163 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:16,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:16,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:16,369 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:16,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:16,370 INFO L85 PathProgramCache]: Analyzing trace with hash 818809269, now seen corresponding path program 1 times [2023-04-01 02:49:16,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:16,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043491723] [2023-04-01 02:49:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:16,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:16,385 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:16,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994928279] [2023-04-01 02:49:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:16,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:16,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:16,387 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) [2023-04-01 02:49:16,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:49:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:49:16,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:49:16,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 02:49:16,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 02:49:16,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:16,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043491723] [2023-04-01 02:49:16,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:16,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994928279] [2023-04-01 02:49:16,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994928279] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:49:16,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [23984028] [2023-04-01 02:49:16,522 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:49:16,522 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:16,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:16,523 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:16,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:16,552 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:17,099 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-01 02:49:17,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:17,113 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:17,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '390#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:17,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:17,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:49:17,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-01 02:49:17,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023374148] [2023-04-01 02:49:17,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:17,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 02:49:17,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:17,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 02:49:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-04-01 02:49:17,500 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:49:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:17,598 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2023-04-01 02:49:17,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 02:49:17,599 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2023-04-01 02:49:17,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:17,600 INFO L225 Difference]: With dead ends: 48 [2023-04-01 02:49:17,600 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 02:49:17,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-04-01 02:49:17,602 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:17,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 16 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:49:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 02:49:17,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2023-04-01 02:49:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:49:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-01 02:49:17,613 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2023-04-01 02:49:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:17,613 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-01 02:49:17,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:49:17,613 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-01 02:49:17,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 02:49:17,614 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:17,614 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:17,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:17,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 02:49:17,823 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:17,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:17,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1465783016, now seen corresponding path program 2 times [2023-04-01 02:49:17,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:17,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949187328] [2023-04-01 02:49:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:17,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:17,842 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:17,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206133639] [2023-04-01 02:49:17,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:49:17,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:17,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:17,846 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) [2023-04-01 02:49:17,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:49:17,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:49:17,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:49:17,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-01 02:49:17,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:18,118 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:49:18,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2023-04-01 02:49:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:49:18,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:18,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:18,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949187328] [2023-04-01 02:49:18,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:18,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206133639] [2023-04-01 02:49:18,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206133639] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:49:18,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [435169740] [2023-04-01 02:49:18,520 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:49:18,520 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:18,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:18,520 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:18,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:18,542 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:18,882 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-01 02:49:18,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:18,893 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:19,338 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '619#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:19,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:19,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:49:19,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-04-01 02:49:19,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390908147] [2023-04-01 02:49:19,339 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:19,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 02:49:19,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:19,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 02:49:19,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-04-01 02:49:19,341 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:49:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:19,448 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-04-01 02:49:19,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 02:49:19,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-04-01 02:49:19,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:19,449 INFO L225 Difference]: With dead ends: 36 [2023-04-01 02:49:19,450 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 02:49:19,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2023-04-01 02:49:19,451 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:19,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:49:19,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 02:49:19,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-04-01 02:49:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:49:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-04-01 02:49:19,463 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 22 [2023-04-01 02:49:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:19,463 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-04-01 02:49:19,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 8 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:49:19,464 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-04-01 02:49:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 02:49:19,464 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:19,464 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:19,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:19,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:19,671 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:19,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:19,672 INFO L85 PathProgramCache]: Analyzing trace with hash 149143571, now seen corresponding path program 3 times [2023-04-01 02:49:19,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:19,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233879737] [2023-04-01 02:49:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:19,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:19,687 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:19,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262461022] [2023-04-01 02:49:19,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:49:19,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:19,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:19,689 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) [2023-04-01 02:49:19,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:49:19,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:49:19,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:49:19,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 02:49:19,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 02:49:19,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 02:49:19,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:19,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233879737] [2023-04-01 02:49:19,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:19,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262461022] [2023-04-01 02:49:19,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262461022] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:49:19,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [258279557] [2023-04-01 02:49:19,869 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:49:19,869 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:19,869 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:19,869 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:19,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:19,891 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:20,243 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-01 02:49:20,259 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:20,265 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:20,661 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '927#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:20,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:20,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:49:20,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-01 02:49:20,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448633576] [2023-04-01 02:49:20,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:20,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 02:49:20,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:20,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 02:49:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2023-04-01 02:49:20,664 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:49:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:20,889 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2023-04-01 02:49:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 02:49:20,889 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-04-01 02:49:20,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:20,890 INFO L225 Difference]: With dead ends: 83 [2023-04-01 02:49:20,890 INFO L226 Difference]: Without dead ends: 61 [2023-04-01 02:49:20,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2023-04-01 02:49:20,892 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:20,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 35 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:49:20,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-01 02:49:20,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2023-04-01 02:49:20,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:49:20,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-04-01 02:49:20,906 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 29 [2023-04-01 02:49:20,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:20,906 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-04-01 02:49:20,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:49:20,906 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-04-01 02:49:20,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 02:49:20,907 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:20,907 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:20,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:21,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:21,114 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:21,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:21,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1107171533, now seen corresponding path program 4 times [2023-04-01 02:49:21,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:21,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722314312] [2023-04-01 02:49:21,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:21,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:21,144 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:21,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369962280] [2023-04-01 02:49:21,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:49:21,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:21,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:21,149 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) [2023-04-01 02:49:21,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:49:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:49:21,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 02:49:21,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 02:49:21,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:21,540 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-01 02:49:21,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:21,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722314312] [2023-04-01 02:49:21,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:21,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369962280] [2023-04-01 02:49:21,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369962280] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:49:21,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [393818934] [2023-04-01 02:49:21,543 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:49:21,543 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:21,543 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:21,543 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:21,543 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:21,568 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:21,877 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-01 02:49:21,883 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:21,887 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:22,263 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1375#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:22,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:22,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:49:22,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-01 02:49:22,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370647307] [2023-04-01 02:49:22,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:22,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 02:49:22,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:22,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 02:49:22,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 02:49:22,265 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:49:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:22,785 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2023-04-01 02:49:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 02:49:22,786 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-04-01 02:49:22,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:22,787 INFO L225 Difference]: With dead ends: 131 [2023-04-01 02:49:22,787 INFO L226 Difference]: Without dead ends: 109 [2023-04-01 02:49:22,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=656, Invalid=1696, Unknown=0, NotChecked=0, Total=2352 [2023-04-01 02:49:22,789 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 180 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:22,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 34 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 02:49:22,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-01 02:49:22,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 50. [2023-04-01 02:49:22,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:49:22,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-04-01 02:49:22,810 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 35 [2023-04-01 02:49:22,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:22,811 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-04-01 02:49:22,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:49:22,811 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-04-01 02:49:22,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 02:49:22,812 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:22,812 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:22,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:23,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:23,019 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:23,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:23,019 INFO L85 PathProgramCache]: Analyzing trace with hash 317369715, now seen corresponding path program 5 times [2023-04-01 02:49:23,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:23,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287107220] [2023-04-01 02:49:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:23,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:23,044 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:23,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619770924] [2023-04-01 02:49:23,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:49:23,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:23,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:23,046 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) [2023-04-01 02:49:23,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:49:23,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:49:23,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:49:23,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 02:49:23,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:23,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:49:23,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2023-04-01 02:49:23,566 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2023-04-01 02:49:23,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:23,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:23,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287107220] [2023-04-01 02:49:23,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:23,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619770924] [2023-04-01 02:49:23,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619770924] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:49:23,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1664836821] [2023-04-01 02:49:23,766 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:49:23,766 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:23,766 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:23,766 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:23,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:23,783 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:24,066 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-01 02:49:24,072 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:24,076 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:24,474 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1884#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:24,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:24,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:49:24,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-01 02:49:24,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797742189] [2023-04-01 02:49:24,474 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:24,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 02:49:24,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:24,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 02:49:24,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2023-04-01 02:49:24,476 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:49:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:24,592 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2023-04-01 02:49:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 02:49:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-04-01 02:49:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:24,601 INFO L225 Difference]: With dead ends: 61 [2023-04-01 02:49:24,601 INFO L226 Difference]: Without dead ends: 59 [2023-04-01 02:49:24,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2023-04-01 02:49:24,602 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:24,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:49:24,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-01 02:49:24,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2023-04-01 02:49:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:49:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-04-01 02:49:24,617 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 47 [2023-04-01 02:49:24,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:24,617 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-04-01 02:49:24,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 02:49:24,617 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-04-01 02:49:24,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 02:49:24,618 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:24,618 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:24,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:24,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:24,822 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:24,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:24,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1410941736, now seen corresponding path program 6 times [2023-04-01 02:49:24,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:24,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146674278] [2023-04-01 02:49:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:24,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:24,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:24,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321791936] [2023-04-01 02:49:24,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:49:24,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:24,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:24,852 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) [2023-04-01 02:49:24,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 02:49:24,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:49:24,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:49:24,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 02:49:24,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 02:49:25,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 6 proven. 253 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 02:49:25,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:25,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146674278] [2023-04-01 02:49:25,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:25,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321791936] [2023-04-01 02:49:25,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321791936] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:49:25,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1786745857] [2023-04-01 02:49:25,825 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:49:25,825 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:25,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:25,826 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:25,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:25,852 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:26,133 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2023-04-01 02:49:26,140 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:26,144 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:26,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2470#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:26,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:26,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:49:26,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-01 02:49:26,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729400296] [2023-04-01 02:49:26,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:26,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 02:49:26,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:26,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 02:49:26,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1245, Invalid=2537, Unknown=0, NotChecked=0, Total=3782 [2023-04-01 02:49:26,554 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:49:27,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:27,975 INFO L93 Difference]: Finished difference Result 238 states and 305 transitions. [2023-04-01 02:49:27,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 02:49:27,975 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2023-04-01 02:49:27,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:27,977 INFO L225 Difference]: With dead ends: 238 [2023-04-01 02:49:27,977 INFO L226 Difference]: Without dead ends: 209 [2023-04-01 02:49:27,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2396, Invalid=4744, Unknown=0, NotChecked=0, Total=7140 [2023-04-01 02:49:27,979 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 322 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:27,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 28 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 02:49:27,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-04-01 02:49:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 81. [2023-04-01 02:49:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:49:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2023-04-01 02:49:28,030 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 54 [2023-04-01 02:49:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:28,031 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2023-04-01 02:49:28,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:49:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2023-04-01 02:49:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 02:49:28,038 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:28,038 INFO L195 NwaCegarLoop]: trace histogram [46, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:28,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:28,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:28,245 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:28,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:28,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1174587048, now seen corresponding path program 7 times [2023-04-01 02:49:28,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:28,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234943685] [2023-04-01 02:49:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:28,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:28,289 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:28,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1102835796] [2023-04-01 02:49:28,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:49:28,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:28,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:28,291 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) [2023-04-01 02:49:28,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 02:49:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:49:28,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-01 02:49:28,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 02:49:29,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 6 proven. 1081 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 02:49:31,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:31,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234943685] [2023-04-01 02:49:31,235 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:31,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102835796] [2023-04-01 02:49:31,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102835796] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:49:31,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942057305] [2023-04-01 02:49:31,236 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:49:31,236 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:31,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:31,237 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:31,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:31,257 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:31,526 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-01 02:49:31,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:31,545 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:32,142 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3633#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:32,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:32,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:49:32,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2023-04-01 02:49:32,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884982477] [2023-04-01 02:49:32,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:32,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-04-01 02:49:32,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:32,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-04-01 02:49:32,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4725, Invalid=7265, Unknown=0, NotChecked=0, Total=11990 [2023-04-01 02:49:32,148 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:49:36,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:36,673 INFO L93 Difference]: Finished difference Result 430 states and 569 transitions. [2023-04-01 02:49:36,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-01 02:49:36,674 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 78 [2023-04-01 02:49:36,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:36,676 INFO L225 Difference]: With dead ends: 430 [2023-04-01 02:49:36,676 INFO L226 Difference]: Without dead ends: 401 [2023-04-01 02:49:36,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6601 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9332, Invalid=15160, Unknown=0, NotChecked=0, Total=24492 [2023-04-01 02:49:36,682 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 796 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 1085 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1085 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:36,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 46 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1085 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 02:49:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-04-01 02:49:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 129. [2023-04-01 02:49:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 117 states have (on average 1.017094017094017) internal successors, (119), 118 states have internal predecessors, (119), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:49:36,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-04-01 02:49:36,736 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 78 [2023-04-01 02:49:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:36,736 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-04-01 02:49:36,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 98 states have internal predecessors, (108), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:49:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-04-01 02:49:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-01 02:49:36,738 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:36,738 INFO L195 NwaCegarLoop]: trace histogram [94, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:36,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:36,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 02:49:36,939 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:36,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:36,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1727942056, now seen corresponding path program 8 times [2023-04-01 02:49:36,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:36,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245227966] [2023-04-01 02:49:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:36,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:36,995 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:36,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800848771] [2023-04-01 02:49:36,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:49:36,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:36,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:36,996 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) [2023-04-01 02:49:37,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 02:49:37,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 02:49:37,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:49:37,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 02:49:37,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:37,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:49:37,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 41 [2023-04-01 02:49:37,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4498 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 4471 trivial. 0 not checked. [2023-04-01 02:49:37,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:38,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:38,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245227966] [2023-04-01 02:49:38,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:38,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800848771] [2023-04-01 02:49:38,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800848771] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:49:38,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307523030] [2023-04-01 02:49:38,062 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:49:38,062 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:38,062 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:38,062 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:38,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:38,079 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:38,316 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-01 02:49:38,331 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:38,334 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:38,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5126#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:38,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:38,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:49:38,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-04-01 02:49:38,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12820200] [2023-04-01 02:49:38,745 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:38,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 02:49:38,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:38,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 02:49:38,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2023-04-01 02:49:38,747 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:49:38,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:49:38,887 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2023-04-01 02:49:38,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 02:49:38,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 126 [2023-04-01 02:49:38,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:49:38,889 INFO L225 Difference]: With dead ends: 140 [2023-04-01 02:49:38,889 INFO L226 Difference]: Without dead ends: 138 [2023-04-01 02:49:38,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2023-04-01 02:49:38,890 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:49:38,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 36 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:49:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-04-01 02:49:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2023-04-01 02:49:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 123 states have internal predecessors, (124), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:49:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2023-04-01 02:49:38,941 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 126 [2023-04-01 02:49:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:49:38,941 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2023-04-01 02:49:38,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:49:38,942 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2023-04-01 02:49:38,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-01 02:49:38,943 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:49:38,943 INFO L195 NwaCegarLoop]: trace histogram [94, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:49:38,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 02:49:39,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 02:49:39,150 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:49:39,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:49:39,150 INFO L85 PathProgramCache]: Analyzing trace with hash 307227987, now seen corresponding path program 9 times [2023-04-01 02:49:39,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:49:39,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686657178] [2023-04-01 02:49:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:49:39,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:49:39,216 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 02:49:39,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807516077] [2023-04-01 02:49:39,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:49:39,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:49:39,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:49:39,218 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) [2023-04-01 02:49:39,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 02:49:39,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:49:39,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:49:39,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 97 conjunts are in the unsatisfiable core [2023-04-01 02:49:39,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:49:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-01 02:49:43,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:49:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 8 proven. 4465 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-01 02:49:49,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:49:49,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686657178] [2023-04-01 02:49:49,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 02:49:49,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807516077] [2023-04-01 02:49:49,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807516077] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:49:49,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [46496122] [2023-04-01 02:49:49,751 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-01 02:49:49,751 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:49:49,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:49:49,752 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:49:49,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:49:49,777 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-01 02:49:50,032 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-01 02:49:50,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:49:50,044 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:49:50,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6638#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:49:50,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:49:50,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 02:49:50,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2023-04-01 02:49:50,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109652196] [2023-04-01 02:49:50,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 02:49:50,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-04-01 02:49:50,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:49:50,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-04-01 02:49:50,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18597, Invalid=23633, Unknown=0, NotChecked=0, Total=42230 [2023-04-01 02:49:50,886 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 194 states, 194 states have (on average 1.0515463917525774) internal successors, (204), 194 states have internal predecessors, (204), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4)