/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 EqDomain -i ../sv-benchmarks/c/array-tiling/pr4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:51:36,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:51:36,078 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:51:36,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 08:51:36,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 08:51:36,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 08:51:36,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 08:51:36,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 08:51:36,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 08:51:36,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 08:51:36,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 08:51:36,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 08:51:36,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:51:36,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:51:36,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:51:36,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:51:36,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:51:36,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:51:36,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:51:36,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:51:36,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:51:36,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:51:36,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:51:36,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:51:36,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 08:51:36,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:51:36,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:51:36,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:51:36,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:51:36,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:51:36,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:51:36,139 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:51:36,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:51:36,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:51:36,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:51:36,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:51:36,142 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 08:51:36,162 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:51:36,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:51:36,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:51:36,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:51:36,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:51:36,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:51:36,164 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:51:36,164 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:51:36,165 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:51:36,165 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:51:36,165 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:51:36,165 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:51:36,166 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:51:36,166 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:51:36,166 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:51:36,166 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:51:36,166 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:51:36,166 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:51:36,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:51:36,167 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:51:36,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:51:36,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:51:36,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:51:36,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:51:36,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:51:36,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:51:36,168 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:51:36,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:51:36,168 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:51:36,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:51:36,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:51:36,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:51:36,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:51:36,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:51:36,169 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:51:36,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:51:36,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:51:36,170 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:51:36,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:51:36,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:51:36,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:51:36,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:51:36,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:51:36,412 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:51:36,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:51:36,415 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:51:36,416 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:51:36,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr4.c [2023-04-01 08:51:37,548 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:51:37,729 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:51:37,730 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr4.c [2023-04-01 08:51:37,737 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3e97d22b/067b3bea7eac41e18bddf2222ff87f36/FLAG69ac40722 [2023-04-01 08:51:37,748 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3e97d22b/067b3bea7eac41e18bddf2222ff87f36 [2023-04-01 08:51:37,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:51:37,752 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:51:37,753 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:51:37,753 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:51:37,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:51:37,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:51:37" (1/1) ... [2023-04-01 08:51:37,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25c96e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:37, skipping insertion in model container [2023-04-01 08:51:37,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:51:37" (1/1) ... [2023-04-01 08:51:37,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:51:37,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:51:37,910 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-tiling/pr4.c[394,407] [2023-04-01 08:51:37,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:51:37,944 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:51:37,956 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-tiling/pr4.c[394,407] [2023-04-01 08:51:37,965 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:51:37,976 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:51:37,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:37 WrapperNode [2023-04-01 08:51:37,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:51:37,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:51:37,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:51:37,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:51:37,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:37" (1/1) ... [2023-04-01 08:51:37,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:37" (1/1) ... [2023-04-01 08:51:37,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:37" (1/1) ... [2023-04-01 08:51:37,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:37" (1/1) ... [2023-04-01 08:51:38,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:37" (1/1) ... [2023-04-01 08:51:38,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:37" (1/1) ... [2023-04-01 08:51:38,004 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:37" (1/1) ... [2023-04-01 08:51:38,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:37" (1/1) ... [2023-04-01 08:51:38,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:51:38,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:51:38,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:51:38,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:51:38,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:37" (1/1) ... [2023-04-01 08:51:38,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:51:38,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:51:38,038 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 08:51:38,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 08:51:38,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:51:38,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:51:38,071 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:51:38,072 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 08:51:38,072 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 08:51:38,072 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:51:38,073 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:51:38,073 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:51:38,073 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:51:38,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:51:38,073 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 08:51:38,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:51:38,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 08:51:38,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:51:38,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 08:51:38,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:51:38,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:51:38,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:51:38,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:51:38,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:51:38,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:51:38,136 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:51:38,138 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:51:38,389 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:51:38,483 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:51:38,483 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 08:51:38,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:51:38 BoogieIcfgContainer [2023-04-01 08:51:38,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:51:38,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:51:38,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:51:38,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:51:38,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:51:37" (1/3) ... [2023-04-01 08:51:38,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f458709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:51:38, skipping insertion in model container [2023-04-01 08:51:38,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:51:37" (2/3) ... [2023-04-01 08:51:38,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f458709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:51:38, skipping insertion in model container [2023-04-01 08:51:38,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:51:38" (3/3) ... [2023-04-01 08:51:38,493 INFO L112 eAbstractionObserver]: Analyzing ICFG pr4.c [2023-04-01 08:51:38,510 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:51:38,510 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:51:38,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:51:38,571 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;@10b4958a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:51:38,571 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:51:38,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:51:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 08:51:38,584 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:51:38,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:51:38,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:51:38,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:51:38,591 INFO L85 PathProgramCache]: Analyzing trace with hash 939670061, now seen corresponding path program 1 times [2023-04-01 08:51:38,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:51:38,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001733992] [2023-04-01 08:51:38,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:38,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:51:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:39,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:51:39,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001733992] [2023-04-01 08:51:39,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001733992] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:51:39,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:51:39,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 08:51:39,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336570587] [2023-04-01 08:51:39,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:51:39,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 08:51:39,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:51:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 08:51:39,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:51:39,163 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:51:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:51:39,272 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2023-04-01 08:51:39,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 08:51:39,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-04-01 08:51:39,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:51:39,279 INFO L225 Difference]: With dead ends: 50 [2023-04-01 08:51:39,279 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 08:51:39,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 08:51:39,284 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:51:39,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 60 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:51:39,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 08:51:39,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 08:51:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 08:51:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-01 08:51:39,311 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2023-04-01 08:51:39,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:51:39,312 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-01 08:51:39,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 08:51:39,312 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-01 08:51:39,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 08:51:39,313 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:51:39,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:51:39,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:51:39,313 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:51:39,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:51:39,314 INFO L85 PathProgramCache]: Analyzing trace with hash -467907769, now seen corresponding path program 1 times [2023-04-01 08:51:39,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:51:39,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098045795] [2023-04-01 08:51:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:39,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:51:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:40,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:51:40,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098045795] [2023-04-01 08:51:40,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098045795] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:51:40,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969795894] [2023-04-01 08:51:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:40,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:40,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:51:40,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:51:40,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 08:51:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:40,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 43 conjunts are in the unsatisfiable core [2023-04-01 08:51:40,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:51:40,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:51:40,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2023-04-01 08:51:41,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 124 [2023-04-01 08:51:41,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2023-04-01 08:51:41,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2023-04-01 08:51:41,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 131 [2023-04-01 08:51:41,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 81 [2023-04-01 08:51:41,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:51:41,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2023-04-01 08:51:41,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2023-04-01 08:51:41,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-04-01 08:51:41,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-04-01 08:51:41,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 39 [2023-04-01 08:51:41,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 11 [2023-04-01 08:51:41,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 63 [2023-04-01 08:51:41,574 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-04-01 08:51:41,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2023-04-01 08:51:41,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 45 [2023-04-01 08:51:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:41,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:51:41,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:41,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 53 [2023-04-01 08:51:42,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:42,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 286 treesize of output 369 [2023-04-01 08:51:43,229 INFO L321 Elim1Store]: treesize reduction 39, result has 75.2 percent of original size [2023-04-01 08:51:43,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 12 case distinctions, treesize of input 100 treesize of output 578 [2023-04-01 08:51:44,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:44,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 18 [2023-04-01 08:51:44,309 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:44,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 18 [2023-04-01 08:51:44,375 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:44,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 18 [2023-04-01 08:51:44,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 159 [2023-04-01 08:51:44,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:44,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 18 [2023-04-01 08:51:44,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 84 [2023-04-01 08:51:44,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 1 [2023-04-01 08:51:44,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 1 [2023-04-01 08:51:44,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 364 treesize of output 351 [2023-04-01 08:51:44,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:44,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 274 [2023-04-01 08:51:44,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 78 [2023-04-01 08:51:44,649 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 08:51:44,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 247 treesize of output 215 [2023-04-01 08:51:44,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-04-01 08:51:44,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2023-04-01 08:51:44,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-04-01 08:51:44,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-04-01 08:51:44,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-04-01 08:51:44,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-04-01 08:51:44,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-04-01 08:51:44,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:44,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 140 treesize of output 257 [2023-04-01 08:51:44,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 43 [2023-04-01 08:51:44,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2023-04-01 08:51:45,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 43 [2023-04-01 08:51:45,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2023-04-01 08:51:45,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-04-01 08:51:45,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2023-04-01 08:51:45,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2023-04-01 08:51:45,089 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 08:51:45,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 149 treesize of output 131 [2023-04-01 08:51:45,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 28 [2023-04-01 08:51:45,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2023-04-01 08:51:45,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2023-04-01 08:51:45,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2023-04-01 08:51:45,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 115 [2023-04-01 08:51:45,132 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 08:51:45,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 83 treesize of output 57 [2023-04-01 08:51:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:45,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969795894] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:51:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [501631104] [2023-04-01 08:51:45,219 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 08:51:45,219 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:51:45,222 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:51:45,226 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:51:45,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:51:45,471 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 79 for LOIs [2023-04-01 08:51:47,282 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 121 for LOIs [2023-04-01 08:51:47,396 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-04-01 08:51:47,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:51:47,419 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:51:49,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '258#(and (= (mod ~CELLCOUNT~0 4) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (< 0 ~CELLCOUNT~0) (exists ((|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int)) (|v_main_~#volArray~0.base_BEFORE_CALL_3| Int)) (and (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#length)_BEFORE_CALL_3|)) (= (select |v_old(#valid)_BEFORE_CALL_3| |v_main_~#volArray~0.base_BEFORE_CALL_3|) 0) (not (= (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_3|) 0) 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 5) 0) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| 0)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (= 52 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 2)) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| 1)) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 3)) (= (select |v_old(#length)_BEFORE_CALL_3| 2) 6) (= 114 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 1)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 12) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) |v_old(#valid)_BEFORE_CALL_3|)) (= 112 (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 0)) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| 2)) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_3| 3)) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 2) 4) 99) (not (= (select |v_old(#memory_int)_BEFORE_CALL_3| 2) (select |v_old(#memory_int)_BEFORE_CALL_3| 1))))) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:51:49,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:51:49,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:51:49,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 8] total 22 [2023-04-01 08:51:49,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821695457] [2023-04-01 08:51:49,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:51:49,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 08:51:49,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:51:49,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 08:51:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1271, Unknown=2, NotChecked=0, Total=1406 [2023-04-01 08:51:49,906 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 22 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 08:51:50,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:51:50,727 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-04-01 08:51:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 08:51:50,727 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 18 [2023-04-01 08:51:50,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:51:50,729 INFO L225 Difference]: With dead ends: 35 [2023-04-01 08:51:50,729 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 08:51:50,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=260, Invalid=2090, Unknown=2, NotChecked=0, Total=2352 [2023-04-01 08:51:50,731 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 08:51:50,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 114 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 08:51:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 08:51:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2023-04-01 08:51:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 08:51:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-04-01 08:51:50,741 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 18 [2023-04-01 08:51:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:51:50,741 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-04-01 08:51:50,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 08:51:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-04-01 08:51:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 08:51:50,742 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:51:50,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:51:50,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 08:51:50,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:50,948 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:51:50,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:51:50,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1073744985, now seen corresponding path program 1 times [2023-04-01 08:51:50,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:51:50,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037396533] [2023-04-01 08:51:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:50,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:51:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:51,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:51:51,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037396533] [2023-04-01 08:51:51,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037396533] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:51:51,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653462154] [2023-04-01 08:51:51,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:51:51,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:51:51,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:51:51,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:51:51,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 08:51:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:51:51,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 42 conjunts are in the unsatisfiable core [2023-04-01 08:51:51,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:51:52,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:51:52,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2023-04-01 08:51:52,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 115 [2023-04-01 08:51:52,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 133 [2023-04-01 08:51:52,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 214 [2023-04-01 08:51:52,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 25 [2023-04-01 08:51:52,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 65 [2023-04-01 08:51:52,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 65 [2023-04-01 08:51:52,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2023-04-01 08:51:52,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 36 [2023-04-01 08:51:52,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 34 [2023-04-01 08:51:52,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 53 [2023-04-01 08:51:52,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 36 [2023-04-01 08:51:52,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:52,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 58 [2023-04-01 08:51:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:52,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:51:52,930 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:51:52,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 53 [2023-04-01 08:51:53,168 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 08:51:53,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 460 treesize of output 424 [2023-04-01 08:51:53,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-04-01 08:51:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 08:51:53,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653462154] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:51:53,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2113879989] [2023-04-01 08:51:53,249 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 08:51:53,249 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:51:53,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:51:53,249 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:51:53,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:51:53,337 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 79 for LOIs [2023-04-01 08:51:57,038 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 123 for LOIs [2023-04-01 08:51:57,159 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-04-01 08:51:57,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:51:57,174 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:51:59,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '563#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_23| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_23| (Array Int Int)) (v_main_~i~0_BEFORE_CALL_20 Int) (|v_main_~#volArray~0.base_BEFORE_CALL_25| Int) (|v_old(#length)_BEFORE_CALL_23| (Array Int Int))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 1) 0) 48) (< v_main_~i~0_BEFORE_CALL_20 ~CELLCOUNT~0) (= 6 (select |v_old(#length)_BEFORE_CALL_23| 2)) (= (select |v_old(#valid)_BEFORE_CALL_23| |v_main_~#volArray~0.base_BEFORE_CALL_25|) 0) (= 12 (select |v_old(#length)_BEFORE_CALL_23| 3)) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_25| 1)) (not (= 3 |v_main_~#volArray~0.base_BEFORE_CALL_25|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 4) 99) (= (select |v_old(#valid)_BEFORE_CALL_23| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_23| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 1) 1) 0) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_25| 0)) (= 114 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 1)) (not (= (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_25|) (* v_main_~i~0_BEFORE_CALL_20 4)) 0)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_23| 1) |v_old(#length)_BEFORE_CALL_23|)) (not (= |v_old(#valid)_BEFORE_CALL_23| (select |v_old(#memory_int)_BEFORE_CALL_23| 1))) (not (= |v_old(#valid)_BEFORE_CALL_23| |v_old(#length)_BEFORE_CALL_23|)) (not (= 2 |v_main_~#volArray~0.base_BEFORE_CALL_25|)) (= 46 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 3)) (not (= |v_old(#valid)_BEFORE_CALL_23| (select |v_old(#memory_int)_BEFORE_CALL_23| 2))) (= 52 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 2)) (= 112 (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 0)) (not (= |#StackHeapBarrier| |v_main_~#volArray~0.base_BEFORE_CALL_25|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_23| 2) 5) 0) (not (= (select |v_old(#memory_int)_BEFORE_CALL_23| 2) |v_old(#length)_BEFORE_CALL_23|)) (= (select |v_old(#valid)_BEFORE_CALL_23| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_23| 3) 1) (not (= (select |v_old(#memory_int)_BEFORE_CALL_23| 2) (select |v_old(#memory_int)_BEFORE_CALL_23| 1))) (= (select |v_old(#length)_BEFORE_CALL_23| 1) 2))) (= (mod ~CELLCOUNT~0 4) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:51:59,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:51:59,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:51:59,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 9] total 26 [2023-04-01 08:51:59,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344628290] [2023-04-01 08:51:59,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:51:59,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 08:51:59,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:51:59,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 08:51:59,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1636, Unknown=2, NotChecked=0, Total=1806 [2023-04-01 08:51:59,413 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 26 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 7 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 08:52:00,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:52:00,460 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2023-04-01 08:52:00,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 08:52:00,461 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 7 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 25 [2023-04-01 08:52:00,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:52:00,462 INFO L225 Difference]: With dead ends: 40 [2023-04-01 08:52:00,462 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 08:52:00,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=354, Invalid=2836, Unknown=2, NotChecked=0, Total=3192 [2023-04-01 08:52:00,463 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 88 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 08:52:00,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 144 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 08:52:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 08:52:00,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2023-04-01 08:52:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 08:52:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-04-01 08:52:00,473 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 25 [2023-04-01 08:52:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:52:00,473 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-04-01 08:52:00,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 7 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 08:52:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-04-01 08:52:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 08:52:00,474 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:52:00,474 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:52:00,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 08:52:00,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 08:52:00,675 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:52:00,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:52:00,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1600541447, now seen corresponding path program 2 times [2023-04-01 08:52:00,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:52:00,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884992654] [2023-04-01 08:52:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:00,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:52:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:52:01,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:52:01,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884992654] [2023-04-01 08:52:01,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884992654] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:52:01,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019288515] [2023-04-01 08:52:01,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:52:01,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:01,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:52:01,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:52:01,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 08:52:01,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 08:52:01,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:52:01,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 08:52:01,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:52:01,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:52:01,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 42 [2023-04-01 08:52:01,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 100 [2023-04-01 08:52:01,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 87 [2023-04-01 08:52:01,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 88 [2023-04-01 08:52:01,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2023-04-01 08:52:01,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 08:52:01,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 31 [2023-04-01 08:52:01,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2023-04-01 08:52:01,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-04-01 08:52:01,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 08:52:09,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 45 [2023-04-01 08:52:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 08:52:09,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:52:12,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:52:12,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 53 [2023-04-01 08:52:12,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 164 [2023-04-01 08:52:12,110 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 08:52:12,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 140 treesize of output 124 [2023-04-01 08:52:12,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-04-01 08:52:12,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 08:52:12,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019288515] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:52:12,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1220784499] [2023-04-01 08:52:12,153 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 08:52:12,153 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:52:12,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:52:12,154 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:52:12,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:52:12,207 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 79 for LOIs [2023-04-01 08:52:15,641 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 123 for LOIs [2023-04-01 08:52:15,777 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-04-01 08:52:15,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:52:15,791 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:52:27,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '936#(and (= (mod ~CELLCOUNT~0 4) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (not (= |#StackHeapBarrier| 0)) (= |#NULL.offset| 0) (exists ((|v_old(#memory_int)_BEFORE_CALL_45| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_45| (Array Int Int)) (|v_main_~#volArray~0.base_BEFORE_CALL_51| Int) (v_main_~i~0_BEFORE_CALL_43 Int) (|v_old(#length)_BEFORE_CALL_45| (Array Int Int))) (and (= (select |v_old(#valid)_BEFORE_CALL_45| 2) 1) (not (= |v_old(#length)_BEFORE_CALL_45| (select |v_old(#memory_int)_BEFORE_CALL_45| 2))) (not (= 3 |v_main_~#volArray~0.base_BEFORE_CALL_51|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 1) 0) 48) (not (= 0 (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_51|) (* v_main_~i~0_BEFORE_CALL_43 4)))) (= (select |v_old(#length)_BEFORE_CALL_45| 3) 12) (not (= |v_old(#valid)_BEFORE_CALL_45| |v_old(#length)_BEFORE_CALL_45|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 2) 3) 46) (< v_main_~i~0_BEFORE_CALL_43 ~CELLCOUNT~0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 2) 4) 99) (= (select |v_old(#length)_BEFORE_CALL_45| 2) 6) (not (= (select |v_old(#memory_int)_BEFORE_CALL_45| 1) |v_old(#length)_BEFORE_CALL_45|)) (not (= |v_old(#valid)_BEFORE_CALL_45| (select |v_old(#memory_int)_BEFORE_CALL_45| 1))) (not (= (select |v_old(#memory_int)_BEFORE_CALL_45| 1) (select |v_old(#memory_int)_BEFORE_CALL_45| 2))) (= 2 (select |v_old(#length)_BEFORE_CALL_45| 1)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 2) 5) 0) (= 112 (select (select |v_old(#memory_int)_BEFORE_CALL_45| 2) 0)) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_51| 1)) (not (= |#StackHeapBarrier| |v_main_~#volArray~0.base_BEFORE_CALL_51|)) (not (= 2 |v_main_~#volArray~0.base_BEFORE_CALL_51|)) (= (select |v_old(#valid)_BEFORE_CALL_45| 1) 1) (= (select (select |v_old(#memory_int)_BEFORE_CALL_45| 1) 1) 0) (= 114 (select (select |v_old(#memory_int)_BEFORE_CALL_45| 2) 1)) (= (select |v_old(#valid)_BEFORE_CALL_45| 3) 1) (not (= |v_old(#valid)_BEFORE_CALL_45| (select |v_old(#memory_int)_BEFORE_CALL_45| 2))) (= (select |v_old(#valid)_BEFORE_CALL_45| 0) 0) (= 52 (select (select |v_old(#memory_int)_BEFORE_CALL_45| 2) 2)) (= (select |v_old(#valid)_BEFORE_CALL_45| |v_main_~#volArray~0.base_BEFORE_CALL_51|) 0) (not (= |v_main_~#volArray~0.base_BEFORE_CALL_51| 0)))) (= |#NULL.base| 0))' at error location [2023-04-01 08:52:27,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:52:27,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:52:27,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 10] total 27 [2023-04-01 08:52:27,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501928693] [2023-04-01 08:52:27,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:52:27,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 08:52:27,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:52:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 08:52:27,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1724, Unknown=9, NotChecked=0, Total=1892 [2023-04-01 08:52:27,503 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 10 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-04-01 08:52:29,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:52:29,092 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-04-01 08:52:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 08:52:29,093 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 10 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 32 [2023-04-01 08:52:29,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:52:29,094 INFO L225 Difference]: With dead ends: 49 [2023-04-01 08:52:29,094 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 08:52:29,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=373, Invalid=3278, Unknown=9, NotChecked=0, Total=3660 [2023-04-01 08:52:29,096 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 08:52:29,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 164 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 08:52:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 08:52:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2023-04-01 08:52:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 08:52:29,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2023-04-01 08:52:29,109 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 32 [2023-04-01 08:52:29,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:52:29,109 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2023-04-01 08:52:29,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 10 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-04-01 08:52:29,109 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2023-04-01 08:52:29,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 08:52:29,110 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:52:29,110 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:52:29,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 08:52:29,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:29,316 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:52:29,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:52:29,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1855048857, now seen corresponding path program 3 times [2023-04-01 08:52:29,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:52:29,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963269099] [2023-04-01 08:52:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:52:29,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:52:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:52:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:52:29,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:52:29,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963269099] [2023-04-01 08:52:29,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963269099] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:52:29,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619047013] [2023-04-01 08:52:29,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:52:29,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:52:29,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:52:29,861 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 08:52:29,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 08:52:29,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:52:29,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:52:29,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2023-04-01 08:52:29,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:52:29,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 08:52:29,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2023-04-01 08:52:29,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-04-01 08:52:30,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 45 [2023-04-01 08:52:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 08:52:30,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:52:30,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 08:52:30,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 53 [2023-04-01 08:52:30,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2023-04-01 08:52:30,651 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 08:52:30,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 41 treesize of output 33 [2023-04-01 08:52:30,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-04-01 08:52:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 08:52:30,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619047013] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:52:30,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [374471954] [2023-04-01 08:52:30,679 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 08:52:30,679 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:52:30,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:52:30,680 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:52:30,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:52:30,720 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 79 for LOIs [2023-04-01 08:52:33,464 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 123 for LOIs [2023-04-01 08:52:33,594 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 94 for LOIs [2023-04-01 08:52:33,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 08:52:33,611 INFO L180 IcfgInterpreter]: Interpretation finished