/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_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 14:41:27,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 14:41:27,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 14:41:27,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 14:41:27,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 14:41:27,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 14:41:27,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 14:41:27,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 14:41:27,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 14:41:27,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 14:41:27,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 14:41:27,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 14:41:27,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 14:41:27,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 14:41:27,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 14:41:27,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 14:41:27,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 14:41:27,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 14:41:27,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 14:41:27,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 14:41:27,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 14:41:27,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 14:41:27,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 14:41:27,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 14:41:27,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 14:41:27,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 14:41:27,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 14:41:27,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 14:41:27,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 14:41:27,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 14:41:27,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 14:41:27,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 14:41:27,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 14:41:27,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 14:41:27,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 14:41:27,375 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 14:41:27,376 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 [2023-04-02 14:41:27,405 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 14:41:27,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 14:41:27,406 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 14:41:27,406 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 14:41:27,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 14:41:27,407 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 14:41:27,407 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 14:41:27,407 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 14:41:27,407 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 14:41:27,407 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 14:41:27,408 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 14:41:27,408 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 14:41:27,408 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 14:41:27,408 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 14:41:27,408 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 14:41:27,408 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 14:41:27,409 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 14:41:27,409 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 14:41:27,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 14:41:27,410 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 14:41:27,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 14:41:27,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 14:41:27,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 14:41:27,410 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 14:41:27,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 14:41:27,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 14:41:27,411 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 14:41:27,411 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 14:41:27,411 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 14:41:27,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 14:41:27,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 14:41:27,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 14:41:27,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:41:27,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 14:41:27,412 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 14:41:27,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 14:41:27,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 14:41:27,412 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 14:41:27,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 14:41:27,412 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 14:41:27,412 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 14:41:27,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 14:41:27,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 14:41:27,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 14:41:27,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 14:41:27,649 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 14:41:27,649 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 14:41:27,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_1.c [2023-04-02 14:41:28,754 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 14:41:28,889 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 14:41:28,890 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_1.c [2023-04-02 14:41:28,894 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e0514b6/2c5a1ced5e0544ae8afc284b1ec907bf/FLAGcf493e366 [2023-04-02 14:41:28,905 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e0514b6/2c5a1ced5e0544ae8afc284b1ec907bf [2023-04-02 14:41:28,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 14:41:28,908 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 14:41:28,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 14:41:28,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 14:41:28,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 14:41:28,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:41:28" (1/1) ... [2023-04-02 14:41:28,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@90065c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:41:28, skipping insertion in model container [2023-04-02 14:41:28,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 02:41:28" (1/1) ... [2023-04-02 14:41:28,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 14:41:28,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 14:41:29,031 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_1.c[323,336] [2023-04-02 14:41:29,047 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:41:29,056 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 14:41:29,069 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_1.c[323,336] [2023-04-02 14:41:29,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 14:41:29,097 INFO L208 MainTranslator]: Completed translation [2023-04-02 14:41:29,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:41:29 WrapperNode [2023-04-02 14:41:29,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 14:41:29,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 14:41:29,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 14:41:29,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 14:41:29,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:41:29" (1/1) ... [2023-04-02 14:41:29,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:41:29" (1/1) ... [2023-04-02 14:41:29,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:41:29" (1/1) ... [2023-04-02 14:41:29,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:41:29" (1/1) ... [2023-04-02 14:41:29,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:41:29" (1/1) ... [2023-04-02 14:41:29,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:41:29" (1/1) ... [2023-04-02 14:41:29,123 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:41:29" (1/1) ... [2023-04-02 14:41:29,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:41:29" (1/1) ... [2023-04-02 14:41:29,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 14:41:29,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 14:41:29,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 14:41:29,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 14:41:29,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:41:29" (1/1) ... [2023-04-02 14:41:29,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 14:41:29,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:41:29,156 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) [2023-04-02 14:41:29,160 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 [2023-04-02 14:41:29,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 14:41:29,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 14:41:29,185 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 14:41:29,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 14:41:29,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 14:41:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 14:41:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 14:41:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 14:41:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 14:41:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 14:41:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 14:41:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 14:41:29,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 14:41:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 14:41:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 14:41:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 14:41:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 14:41:29,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 14:41:29,259 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 14:41:29,260 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 14:41:29,433 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 14:41:29,492 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 14:41:29,492 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 14:41:29,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:41:29 BoogieIcfgContainer [2023-04-02 14:41:29,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 14:41:29,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 14:41:29,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 14:41:29,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 14:41:29,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 02:41:28" (1/3) ... [2023-04-02 14:41:29,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d284e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:41:29, skipping insertion in model container [2023-04-02 14:41:29,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 02:41:29" (2/3) ... [2023-04-02 14:41:29,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d284e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 02:41:29, skipping insertion in model container [2023-04-02 14:41:29,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 02:41:29" (3/3) ... [2023-04-02 14:41:29,527 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_1.c [2023-04-02 14:41:29,545 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 14:41:29,546 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 14:41:29,595 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 14:41:29,602 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;@118c6d40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 14:41:29,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 14:41:29,607 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) [2023-04-02 14:41:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 14:41:29,614 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:41:29,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:41:29,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:41:29,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:41:29,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1627243692, now seen corresponding path program 1 times [2023-04-02 14:41:29,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:41:29,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102364578] [2023-04-02 14:41:29,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:41:29,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:41:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:41:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:41:29,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:41:29,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102364578] [2023-04-02 14:41:29,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102364578] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:41:29,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 14:41:29,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 14:41:29,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045104747] [2023-04-02 14:41:29,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:41:29,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 14:41:29,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:41:29,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 14:41:29,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 14:41:29,946 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) [2023-04-02 14:41:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:41:30,014 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2023-04-02 14:41:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 14:41:30,016 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 [2023-04-02 14:41:30,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:41:30,021 INFO L225 Difference]: With dead ends: 34 [2023-04-02 14:41:30,021 INFO L226 Difference]: Without dead ends: 19 [2023-04-02 14:41:30,023 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 [2023-04-02 14:41:30,025 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, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:41:30,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:41:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-02 14:41:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2023-04-02 14:41:30,050 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) [2023-04-02 14:41:30,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-04-02 14:41:30,052 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2023-04-02 14:41:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:41:30,052 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-04-02 14:41:30,053 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) [2023-04-02 14:41:30,053 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-04-02 14:41:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-02 14:41:30,053 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:41:30,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:41:30,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 14:41:30,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:41:30,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:41:30,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1579459651, now seen corresponding path program 1 times [2023-04-02 14:41:30,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:41:30,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387851940] [2023-04-02 14:41:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:41:30,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:41:30,077 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:41:30,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205046578] [2023-04-02 14:41:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:41:30,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:41:30,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:41:30,085 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) [2023-04-02 14:41:30,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 14:41:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:41:30,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:41:30,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:41:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:41:30,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:41:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 14:41:30,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:41:30,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387851940] [2023-04-02 14:41:30,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:41:30,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205046578] [2023-04-02 14:41:30,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205046578] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:41:30,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1231134396] [2023-04-02 14:41:30,282 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2023-04-02 14:41:30,283 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:41:30,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:41:30,289 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:41:30,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:41:30,431 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:41:30,645 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2023-04-02 14:41:30,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:41:30,688 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:41:31,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1231134396] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 14:41:31,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:41:31,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 5] total 17 [2023-04-02 14:41:31,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200801032] [2023-04-02 14:41:31,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 14:41:31,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 14:41:31,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:41:31,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 14:41:31,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-04-02 14:41:31,031 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) [2023-04-02 14:41:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:41:31,915 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-04-02 14:41:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:41:31,921 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 [2023-04-02 14:41:31,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:41:31,922 INFO L225 Difference]: With dead ends: 25 [2023-04-02 14:41:31,922 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 14:41:31,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2023-04-02 14:41:31,923 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 [2023-04-02 14:41:31,924 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] [2023-04-02 14:41:31,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 14:41:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-04-02 14:41:31,936 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) [2023-04-02 14:41:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-02 14:41:31,938 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 12 [2023-04-02 14:41:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:41:31,938 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-02 14:41:31,938 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) [2023-04-02 14:41:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-02 14:41:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 14:41:31,940 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:41:31,940 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:41:31,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 14:41:32,145 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 [2023-04-02 14:41:32,146 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:41:32,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:41:32,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1854704851, now seen corresponding path program 1 times [2023-04-02 14:41:32,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:41:32,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257475696] [2023-04-02 14:41:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:41:32,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:41:32,159 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:41:32,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835160554] [2023-04-02 14:41:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:41:32,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:41:32,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:41:32,169 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) [2023-04-02 14:41:32,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 14:41:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:41:32,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 14:41:32,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:41:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 14:41:32,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:41:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 14:41:32,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:41:32,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257475696] [2023-04-02 14:41:32,275 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:41:32,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835160554] [2023-04-02 14:41:32,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835160554] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:41:32,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [660184073] [2023-04-02 14:41:32,278 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:41:32,278 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:41:32,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:41:32,279 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:41:32,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:41:32,329 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:41:32,739 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 14:41:32,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:41:32,752 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:41:33,208 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 [2023-04-02 14:41:33,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:41:33,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:41:33,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 14:41:33,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182042297] [2023-04-02 14:41:33,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:41:33,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 14:41:33,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:41:33,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 14:41:33,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-04-02 14:41:33,210 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) [2023-04-02 14:41:33,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:41:33,286 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2023-04-02 14:41:33,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 14:41:33,286 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 [2023-04-02 14:41:33,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:41:33,287 INFO L225 Difference]: With dead ends: 48 [2023-04-02 14:41:33,287 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 14:41:33,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-04-02 14:41:33,289 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, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:41:33,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 16 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:41:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 14:41:33,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2023-04-02 14:41:33,301 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) [2023-04-02 14:41:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-02 14:41:33,302 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2023-04-02 14:41:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:41:33,302 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-02 14:41:33,302 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) [2023-04-02 14:41:33,303 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-02 14:41:33,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 14:41:33,303 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:41:33,304 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:41:33,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 14:41:33,508 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 [2023-04-02 14:41:33,509 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:41:33,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:41:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash -981913974, now seen corresponding path program 2 times [2023-04-02 14:41:33,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:41:33,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272069890] [2023-04-02 14:41:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:41:33,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:41:33,524 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:41:33,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352777194] [2023-04-02 14:41:33,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:41:33,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:41:33,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:41:33,528 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) [2023-04-02 14:41:33,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 14:41:33,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 14:41:33,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:41:33,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 14:41:33,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:41:33,755 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:41:33,756 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 [2023-04-02 14:41:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-02 14:41:33,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:41:34,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:41:34,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272069890] [2023-04-02 14:41:34,079 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:41:34,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352777194] [2023-04-02 14:41:34,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352777194] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:41:34,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [73851171] [2023-04-02 14:41:34,082 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:41:34,082 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:41:34,082 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:41:34,082 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:41:34,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:41:34,104 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:41:34,412 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:41:34,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:41:34,432 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:41:34,961 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 [2023-04-02 14:41:34,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:41:34,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:41:34,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-04-02 14:41:34,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590024629] [2023-04-02 14:41:34,962 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 14:41:34,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 14:41:34,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:41:34,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 14:41:34,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2023-04-02 14:41:34,963 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) [2023-04-02 14:41:35,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:41:35,104 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-04-02 14:41:35,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 14:41:35,104 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 [2023-04-02 14:41:35,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:41:35,105 INFO L225 Difference]: With dead ends: 36 [2023-04-02 14:41:35,105 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 14:41:35,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2023-04-02 14:41:35,107 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 14:41:35,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 14:41:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 14:41:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-04-02 14:41:35,117 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) [2023-04-02 14:41:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-04-02 14:41:35,118 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 22 [2023-04-02 14:41:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:41:35,118 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-04-02 14:41:35,118 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) [2023-04-02 14:41:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-04-02 14:41:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 14:41:35,119 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:41:35,119 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:41:35,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 14:41:35,325 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 [2023-04-02 14:41:35,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:41:35,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:41:35,326 INFO L85 PathProgramCache]: Analyzing trace with hash 308032684, now seen corresponding path program 3 times [2023-04-02 14:41:35,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:41:35,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823541940] [2023-04-02 14:41:35,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:41:35,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:41:35,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:41:35,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479156513] [2023-04-02 14:41:35,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:41:35,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:41:35,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:41:35,341 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) [2023-04-02 14:41:35,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 14:41:35,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:41:35,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:41:35,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 14:41:35,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:41:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 14:41:35,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:41:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 14:41:35,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:41:35,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823541940] [2023-04-02 14:41:35,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:41:35,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479156513] [2023-04-02 14:41:35,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479156513] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:41:35,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730769300] [2023-04-02 14:41:35,600 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:41:35,600 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:41:35,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:41:35,601 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:41:35,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:41:35,631 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:41:35,971 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 14:41:35,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:41:35,983 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:41:36,349 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 [2023-04-02 14:41:36,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:41:36,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:41:36,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-04-02 14:41:36,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700133750] [2023-04-02 14:41:36,350 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:41:36,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 14:41:36,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:41:36,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 14:41:36,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2023-04-02 14:41:36,351 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) [2023-04-02 14:41:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:41:36,547 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2023-04-02 14:41:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 14:41:36,547 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 [2023-04-02 14:41:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:41:36,549 INFO L225 Difference]: With dead ends: 83 [2023-04-02 14:41:36,549 INFO L226 Difference]: Without dead ends: 61 [2023-04-02 14:41:36,550 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 [2023-04-02 14:41:36,551 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 [2023-04-02 14:41:36,551 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] [2023-04-02 14:41:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-02 14:41:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2023-04-02 14:41:36,565 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) [2023-04-02 14:41:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-04-02 14:41:36,566 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 29 [2023-04-02 14:41:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:41:36,566 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-04-02 14:41:36,566 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) [2023-04-02 14:41:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-04-02 14:41:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-02 14:41:36,567 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:41:36,567 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:41:36,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 14:41:36,767 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 [2023-04-02 14:41:36,768 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:41:36,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:41:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash 807107916, now seen corresponding path program 4 times [2023-04-02 14:41:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:41:36,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557159017] [2023-04-02 14:41:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:41:36,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:41:36,803 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:41:36,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246451010] [2023-04-02 14:41:36,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:41:36,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:41:36,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:41:36,825 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) [2023-04-02 14:41:36,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 14:41:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:41:36,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 14:41:36,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:41:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 14:41:37,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:41:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-04-02 14:41:37,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:41:37,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557159017] [2023-04-02 14:41:37,214 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:41:37,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246451010] [2023-04-02 14:41:37,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246451010] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:41:37,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516162252] [2023-04-02 14:41:37,216 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:41:37,216 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:41:37,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:41:37,216 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:41:37,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:41:37,232 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:41:37,492 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 14:41:37,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:41:37,501 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:41:37,866 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 [2023-04-02 14:41:37,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:41:37,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:41:37,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-04-02 14:41:37,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325420479] [2023-04-02 14:41:37,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:41:37,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-02 14:41:37,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:41:37,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-02 14:41:37,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1037, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 14:41:37,868 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) [2023-04-02 14:41:38,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:41:38,419 INFO L93 Difference]: Finished difference Result 131 states and 163 transitions. [2023-04-02 14:41:38,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-02 14:41:38,420 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 [2023-04-02 14:41:38,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:41:38,421 INFO L225 Difference]: With dead ends: 131 [2023-04-02 14:41:38,421 INFO L226 Difference]: Without dead ends: 109 [2023-04-02 14:41:38,422 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 [2023-04-02 14:41:38,423 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 [2023-04-02 14:41:38,423 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] [2023-04-02 14:41:38,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-04-02 14:41:38,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 50. [2023-04-02 14:41:38,445 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) [2023-04-02 14:41:38,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-04-02 14:41:38,445 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 35 [2023-04-02 14:41:38,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:41:38,446 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-04-02 14:41:38,446 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) [2023-04-02 14:41:38,446 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-04-02 14:41:38,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-02 14:41:38,447 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:41:38,447 INFO L195 NwaCegarLoop]: trace histogram [22, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:41:38,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 14:41:38,652 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 [2023-04-02 14:41:38,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:41:38,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:41:38,653 INFO L85 PathProgramCache]: Analyzing trace with hash -165599604, now seen corresponding path program 5 times [2023-04-02 14:41:38,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:41:38,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911724535] [2023-04-02 14:41:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:41:38,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:41:38,675 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:41:38,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498338526] [2023-04-02 14:41:38,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:41:38,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:41:38,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:41:38,676 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) [2023-04-02 14:41:38,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 14:41:38,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 14:41:38,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:41:38,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2023-04-02 14:41:38,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:41:39,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:41:39,022 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 [2023-04-02 14:41:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2023-04-02 14:41:39,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:41:39,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:41:39,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911724535] [2023-04-02 14:41:39,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:41:39,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498338526] [2023-04-02 14:41:39,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498338526] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:41:39,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885428598] [2023-04-02 14:41:39,262 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:41:39,263 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:41:39,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:41:39,263 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:41:39,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:41:39,280 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:41:39,534 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 14:41:39,542 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:41:39,545 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:41:39,930 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 [2023-04-02 14:41:39,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:41:39,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:41:39,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-04-02 14:41:39,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358629148] [2023-04-02 14:41:39,931 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 14:41:39,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 14:41:39,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:41:39,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 14:41:39,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2023-04-02 14:41:39,932 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) [2023-04-02 14:41:40,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:41:40,061 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2023-04-02 14:41:40,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 14:41:40,062 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 [2023-04-02 14:41:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:41:40,062 INFO L225 Difference]: With dead ends: 61 [2023-04-02 14:41:40,062 INFO L226 Difference]: Without dead ends: 59 [2023-04-02 14:41:40,063 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 [2023-04-02 14:41:40,064 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-04-02 14:41:40,064 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] [2023-04-02 14:41:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-04-02 14:41:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2023-04-02 14:41:40,080 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) [2023-04-02 14:41:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-04-02 14:41:40,081 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 47 [2023-04-02 14:41:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:41:40,081 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-04-02 14:41:40,081 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) [2023-04-02 14:41:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-04-02 14:41:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-02 14:41:40,082 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:41:40,082 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:41:40,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 14:41:40,287 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 [2023-04-02 14:41:40,288 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:41:40,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:41:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash 454006378, now seen corresponding path program 6 times [2023-04-02 14:41:40,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:41:40,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013695878] [2023-04-02 14:41:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:41:40,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:41:40,317 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:41:40,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182255695] [2023-04-02 14:41:40,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:41:40,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:41:40,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:41:40,319 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) [2023-04-02 14:41:40,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 14:41:40,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:41:40,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:41:40,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-02 14:41:40,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:41:40,801 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 14:41:40,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:41:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 6 proven. 253 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 14:41:41,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:41:41,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013695878] [2023-04-02 14:41:41,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:41:41,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182255695] [2023-04-02 14:41:41,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182255695] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:41:41,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1707366739] [2023-04-02 14:41:41,295 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:41:41,295 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:41:41,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:41:41,296 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:41:41,296 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:41:41,330 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:41:41,543 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 14:41:41,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:41:41,551 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:41:41,942 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 [2023-04-02 14:41:41,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:41:41,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:41:41,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-04-02 14:41:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208536263] [2023-04-02 14:41:41,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:41:41,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-02 14:41:41,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:41:41,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-02 14:41:41,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1245, Invalid=2537, Unknown=0, NotChecked=0, Total=3782 [2023-04-02 14:41:41,950 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) [2023-04-02 14:41:43,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:41:43,257 INFO L93 Difference]: Finished difference Result 238 states and 305 transitions. [2023-04-02 14:41:43,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-02 14:41:43,258 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 [2023-04-02 14:41:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:41:43,259 INFO L225 Difference]: With dead ends: 238 [2023-04-02 14:41:43,259 INFO L226 Difference]: Without dead ends: 209 [2023-04-02 14:41:43,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2396, Invalid=4744, Unknown=0, NotChecked=0, Total=7140 [2023-04-02 14:41:43,262 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 322 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-04-02 14:41:43,262 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] [2023-04-02 14:41:43,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-04-02 14:41:43,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 81. [2023-04-02 14:41:43,303 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) [2023-04-02 14:41:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2023-04-02 14:41:43,304 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 54 [2023-04-02 14:41:43,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:41:43,304 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2023-04-02 14:41:43,304 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) [2023-04-02 14:41:43,304 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2023-04-02 14:41:43,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-02 14:41:43,305 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:41:43,305 INFO L195 NwaCegarLoop]: trace histogram [46, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:41:43,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 14:41:43,506 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 [2023-04-02 14:41:43,507 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:41:43,507 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:41:43,507 INFO L85 PathProgramCache]: Analyzing trace with hash 595203050, now seen corresponding path program 7 times [2023-04-02 14:41:43,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:41:43,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060366847] [2023-04-02 14:41:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:41:43,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:41:43,551 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:41:43,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246614098] [2023-04-02 14:41:43,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:41:43,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:41:43,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:41:43,552 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) [2023-04-02 14:41:43,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 14:41:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:41:43,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 49 conjunts are in the unsatisfiable core [2023-04-02 14:41:43,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:41:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-02 14:41:44,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:41:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 6 proven. 1081 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-02 14:41:46,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:41:46,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060366847] [2023-04-02 14:41:46,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:41:46,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246614098] [2023-04-02 14:41:46,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246614098] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:41:46,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1788808482] [2023-04-02 14:41:46,576 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:41:46,576 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:41:46,577 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:41:46,577 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:41:46,577 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:41:46,614 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:41:46,823 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 27 for LOIs [2023-04-02 14:41:46,835 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:41:46,839 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:41:47,397 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 [2023-04-02 14:41:47,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:41:47,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:41:47,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2023-04-02 14:41:47,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260744145] [2023-04-02 14:41:47,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:41:47,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-04-02 14:41:47,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:41:47,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-04-02 14:41:47,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4725, Invalid=7265, Unknown=0, NotChecked=0, Total=11990 [2023-04-02 14:41:47,402 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) [2023-04-02 14:41:51,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:41:51,705 INFO L93 Difference]: Finished difference Result 430 states and 569 transitions. [2023-04-02 14:41:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-04-02 14:41:51,706 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 [2023-04-02 14:41:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:41:51,708 INFO L225 Difference]: With dead ends: 430 [2023-04-02 14:41:51,708 INFO L226 Difference]: Without dead ends: 401 [2023-04-02 14:41:51,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6601 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9332, Invalid=15160, Unknown=0, NotChecked=0, Total=24492 [2023-04-02 14:41:51,715 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 [2023-04-02 14:41:51,715 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] [2023-04-02 14:41:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-04-02 14:41:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 129. [2023-04-02 14:41:51,785 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) [2023-04-02 14:41:51,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-04-02 14:41:51,785 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 78 [2023-04-02 14:41:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:41:51,786 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-04-02 14:41:51,786 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) [2023-04-02 14:41:51,786 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-04-02 14:41:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-04-02 14:41:51,789 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:41:51,789 INFO L195 NwaCegarLoop]: trace histogram [94, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:41:51,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-02 14:41:51,990 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 [2023-04-02 14:41:51,990 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:41:51,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:41:51,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2098040554, now seen corresponding path program 8 times [2023-04-02 14:41:51,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:41:51,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776059580] [2023-04-02 14:41:51,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:41:51,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:41:52,047 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:41:52,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512238690] [2023-04-02 14:41:52,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 14:41:52,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:41:52,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:41:52,051 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) [2023-04-02 14:41:52,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-02 14:41:52,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-02 14:41:52,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:41:52,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-02 14:41:52,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:41:52,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 14:41:52,756 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 [2023-04-02 14:41:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4498 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 4471 trivial. 0 not checked. [2023-04-02 14:41:52,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:41:53,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:41:53,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776059580] [2023-04-02 14:41:53,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:41:53,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512238690] [2023-04-02 14:41:53,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512238690] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 14:41:53,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1976333609] [2023-04-02 14:41:53,013 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:41:53,013 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:41:53,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:41:53,014 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:41:53,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:41:53,028 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:41:53,264 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 14:41:53,269 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:41:53,272 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:41:53,629 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 [2023-04-02 14:41:53,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:41:53,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-04-02 14:41:53,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-04-02 14:41:53,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132704941] [2023-04-02 14:41:53,630 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-04-02 14:41:53,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 14:41:53,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:41:53,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 14:41:53,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2023-04-02 14:41:53,631 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) [2023-04-02 14:41:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:41:53,746 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2023-04-02 14:41:53,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-02 14:41:53,746 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 [2023-04-02 14:41:53,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:41:53,748 INFO L225 Difference]: With dead ends: 140 [2023-04-02 14:41:53,748 INFO L226 Difference]: Without dead ends: 138 [2023-04-02 14:41:53,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2023-04-02 14:41:53,749 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 14:41:53,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 36 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 14:41:53,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-04-02 14:41:53,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2023-04-02 14:41:53,790 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) [2023-04-02 14:41:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2023-04-02 14:41:53,790 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 126 [2023-04-02 14:41:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:41:53,791 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2023-04-02 14:41:53,791 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) [2023-04-02 14:41:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2023-04-02 14:41:53,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-02 14:41:53,792 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:41:53,792 INFO L195 NwaCegarLoop]: trace histogram [94, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:41:53,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-02 14:41:53,998 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 [2023-04-02 14:41:53,998 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:41:53,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:41:53,998 INFO L85 PathProgramCache]: Analyzing trace with hash -779311028, now seen corresponding path program 9 times [2023-04-02 14:41:53,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:41:53,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139126534] [2023-04-02 14:41:53,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:41:53,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:41:54,062 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:41:54,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82064056] [2023-04-02 14:41:54,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 14:41:54,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:41:54,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:41:54,063 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) [2023-04-02 14:41:54,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-02 14:41:54,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 14:41:54,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 14:41:54,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 1072 conjuncts, 97 conjunts are in the unsatisfiable core [2023-04-02 14:41:54,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:41:57,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-02 14:41:58,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:42:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4523 backedges. 8 proven. 4465 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 14:42:05,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:42:05,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139126534] [2023-04-02 14:42:05,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:42:05,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82064056] [2023-04-02 14:42:05,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82064056] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:42:05,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [319526985] [2023-04-02 14:42:05,057 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:42:05,057 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:42:05,057 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:42:05,057 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:42:05,057 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:42:05,078 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:42:05,283 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 14:42:05,287 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:42:05,289 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:42:06,022 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 [2023-04-02 14:42:06,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:42:06,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:42:06,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 194 [2023-04-02 14:42:06,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715635128] [2023-04-02 14:42:06,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:42:06,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2023-04-02 14:42:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:42:06,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2023-04-02 14:42:06,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18597, Invalid=23633, Unknown=0, NotChecked=0, Total=42230 [2023-04-02 14:42:06,030 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) [2023-04-02 14:42:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 14:42:27,293 INFO L93 Difference]: Finished difference Result 825 states and 1107 transitions. [2023-04-02 14:42:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-04-02 14:42:27,294 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 133 [2023-04-02 14:42:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 14:42:27,298 INFO L225 Difference]: With dead ends: 825 [2023-04-02 14:42:27,298 INFO L226 Difference]: Without dead ends: 789 [2023-04-02 14:42:27,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22441 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=37028, Invalid=53272, Unknown=0, NotChecked=0, Total=90300 [2023-04-02 14:42:27,304 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1614 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 2193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1709 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2193 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-02 14:42:27,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1709 Valid, 34 Invalid, 2974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2193 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-02 14:42:27,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2023-04-02 14:42:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 232. [2023-04-02 14:42:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 219 states have internal predecessors, (220), 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) [2023-04-02 14:42:27,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2023-04-02 14:42:27,424 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 133 [2023-04-02 14:42:27,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 14:42:27,424 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2023-04-02 14:42:27,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-04-02 14:42:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2023-04-02 14:42:27,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-04-02 14:42:27,426 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 14:42:27,426 INFO L195 NwaCegarLoop]: trace histogram [190, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 14:42:27,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-02 14:42:27,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-02 14:42:27,636 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 14:42:27,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 14:42:27,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1366625716, now seen corresponding path program 10 times [2023-04-02 14:42:27,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 14:42:27,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568167716] [2023-04-02 14:42:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 14:42:27,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 14:42:27,762 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 14:42:27,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321650581] [2023-04-02 14:42:27,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 14:42:27,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 14:42:27,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 14:42:27,765 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 14:42:27,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-02 14:42:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 14:42:28,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 2032 conjuncts, 193 conjunts are in the unsatisfiable core [2023-04-02 14:42:28,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 14:42:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 18203 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-04-02 14:42:41,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 14:43:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18203 backedges. 8 proven. 18145 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-04-02 14:43:07,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 14:43:07,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568167716] [2023-04-02 14:43:07,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 14:43:07,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321650581] [2023-04-02 14:43:07,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321650581] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 14:43:07,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1222178288] [2023-04-02 14:43:07,032 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 14:43:07,033 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 14:43:07,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 14:43:07,033 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 14:43:07,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 14:43:07,046 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2023-04-02 14:43:07,208 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 16 for LOIs [2023-04-02 14:43:07,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 14:43:07,217 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 14:43:08,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10460#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= ~N~0 1000000) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 14:43:08,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 14:43:08,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 14:43:08,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194] total 386 [2023-04-02 14:43:08,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850738299] [2023-04-02 14:43:08,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 14:43:08,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 386 states [2023-04-02 14:43:08,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 14:43:08,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 386 interpolants. [2023-04-02 14:43:08,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73989, Invalid=84017, Unknown=0, NotChecked=0, Total=158006 [2023-04-02 14:43:08,489 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand has 386 states, 386 states have (on average 1.0259067357512954) internal successors, (396), 386 states have internal predecessors, (396), 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)