/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/array-tiling/pr3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:47:53,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:47:53,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:47:53,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:47:53,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:47:53,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:47:53,800 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:47:53,802 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:47:53,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:47:53,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:47:53,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:47:53,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:47:53,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:47:53,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:47:53,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:47:53,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:47:53,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:47:53,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:47:53,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:47:53,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:47:53,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:47:53,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:47:53,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:47:53,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:47:53,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 02:47:53,830 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:47:53,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:47:53,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:47:53,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:47:53,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:47:53,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:47:53,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:47:53,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:47:53,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:47:53,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:47:53,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:47:53,840 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 02:47:53,865 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:47:53,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:47:53,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:47:53,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:47:53,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:47:53,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:47:53,866 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:47:53,867 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:47:53,867 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:47:53,867 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:47:53,867 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:47:53,867 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:47:53,868 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:47:53,868 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:47:53,868 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:47:53,868 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:47:53,868 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:47:53,868 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:47:53,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:47:53,868 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:47:53,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:47:53,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:47:53,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:47:53,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:47:53,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:47:53,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:47:53,869 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:47:53,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:47:53,869 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:47:53,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:47:53,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:47:53,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:47:53,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:47:53,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:47:53,870 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:47:53,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:47:53,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:47:53,870 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:47:53,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:47:53,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:47:53,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:47:53,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:47:54,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:47:54,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:47:54,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:47:54,056 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:47:54,057 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:47:54,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr3.c [2023-04-01 02:47:55,141 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:47:55,277 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:47:55,278 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr3.c [2023-04-01 02:47:55,284 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f51b5b8f/58546f0bf5de45329ac38eb9413d96cc/FLAGef38f2750 [2023-04-01 02:47:55,296 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f51b5b8f/58546f0bf5de45329ac38eb9413d96cc [2023-04-01 02:47:55,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:47:55,299 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:47:55,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:47:55,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:47:55,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:47:55,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:47:55" (1/1) ... [2023-04-01 02:47:55,305 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@542d9806 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:55, skipping insertion in model container [2023-04-01 02:47:55,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:47:55" (1/1) ... [2023-04-01 02:47:55,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:47:55,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:47:55,443 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/pr3.c[394,407] [2023-04-01 02:47:55,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:47:55,469 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:47:55,479 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/pr3.c[394,407] [2023-04-01 02:47:55,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:47:55,495 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:47:55,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:55 WrapperNode [2023-04-01 02:47:55,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:47:55,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:47:55,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:47:55,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:47:55,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:55" (1/1) ... [2023-04-01 02:47:55,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:55" (1/1) ... [2023-04-01 02:47:55,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:55" (1/1) ... [2023-04-01 02:47:55,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:55" (1/1) ... [2023-04-01 02:47:55,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:55" (1/1) ... [2023-04-01 02:47:55,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:55" (1/1) ... [2023-04-01 02:47:55,516 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:55" (1/1) ... [2023-04-01 02:47:55,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:55" (1/1) ... [2023-04-01 02:47:55,517 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:47:55,518 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:47:55,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:47:55,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:47:55,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:55" (1/1) ... [2023-04-01 02:47:55,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:47:55,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:47:55,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 02:47:55,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 02:47:55,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:47:55,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:47:55,575 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:47:55,579 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 02:47:55,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:47:55,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:47:55,579 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:47:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:47:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:47:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:47:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 02:47:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:47:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:47:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:47:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:47:55,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:47:55,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:47:55,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:47:55,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:47:55,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:47:55,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:47:55,631 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:47:55,633 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:47:55,753 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:47:55,801 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:47:55,801 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 02:47:55,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:47:55 BoogieIcfgContainer [2023-04-01 02:47:55,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:47:55,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:47:55,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:47:55,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:47:55,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:47:55" (1/3) ... [2023-04-01 02:47:55,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314ff535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:47:55, skipping insertion in model container [2023-04-01 02:47:55,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:47:55" (2/3) ... [2023-04-01 02:47:55,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@314ff535 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:47:55, skipping insertion in model container [2023-04-01 02:47:55,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:47:55" (3/3) ... [2023-04-01 02:47:55,808 INFO L112 eAbstractionObserver]: Analyzing ICFG pr3.c [2023-04-01 02:47:55,819 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:47:55,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:47:55,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:47:55,857 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;@bf5b235, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:47:55,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:47:55,859 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 02:47:55,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 02:47:55,864 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:47:55,864 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 02:47:55,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:47:55,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:47:55,868 INFO L85 PathProgramCache]: Analyzing trace with hash -962607903, now seen corresponding path program 1 times [2023-04-01 02:47:55,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:47:55,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539955820] [2023-04-01 02:47:55,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:55,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:47:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:47:56,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:47:56,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539955820] [2023-04-01 02:47:56,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539955820] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:47:56,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:47:56,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 02:47:56,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684642727] [2023-04-01 02:47:56,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:47:56,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 02:47:56,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:47:56,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 02:47:56,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:47:56,362 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 02:47:56,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:47:56,440 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2023-04-01 02:47:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 02:47:56,442 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 02:47:56,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:47:56,446 INFO L225 Difference]: With dead ends: 50 [2023-04-01 02:47:56,447 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 02:47:56,448 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 02:47:56,452 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 02:47:56,453 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 02:47:56,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 02:47:56,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 02:47:56,496 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 02:47:56,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-01 02:47:56,497 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2023-04-01 02:47:56,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:47:56,497 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-01 02:47:56,498 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 02:47:56,498 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-01 02:47:56,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 02:47:56,498 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:47:56,498 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 02:47:56,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:47:56,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:47:56,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:47:56,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1389346453, now seen corresponding path program 1 times [2023-04-01 02:47:56,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:47:56,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158748415] [2023-04-01 02:47:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:56,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:47:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:47:57,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:47:57,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158748415] [2023-04-01 02:47:57,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158748415] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:47:57,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136412659] [2023-04-01 02:47:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:47:57,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:47:57,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:47:57,112 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:47:57,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:47:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:47:57,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-01 02:47:57,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:47:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:47:57,448 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 02:47:57,594 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 99 treesize of output 97 [2023-04-01 02:47:57,603 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 02:47:57,670 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 92 treesize of output 140 [2023-04-01 02:47:57,681 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 39 treesize of output 172 [2023-04-01 02:47:57,751 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 116 treesize of output 98 [2023-04-01 02:47:57,766 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 90 treesize of output 81 [2023-04-01 02:47:57,787 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 116 treesize of output 98 [2023-04-01 02:47:57,801 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 90 treesize of output 81 [2023-04-01 02:47:57,824 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 116 treesize of output 98 [2023-04-01 02:47:57,837 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 90 treesize of output 81 [2023-04-01 02:47:57,882 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 33 treesize of output 1 [2023-04-01 02:47:57,902 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 29 treesize of output 1 [2023-04-01 02:47:57,909 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 44 treesize of output 25 [2023-04-01 02:47:57,922 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 42 treesize of output 23 [2023-04-01 02:47:57,949 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 29 treesize of output 9 [2023-04-01 02:47:57,954 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 5 treesize of output 3 [2023-04-01 02:47:58,094 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 65 treesize of output 45 [2023-04-01 02:47:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:47:58,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:47:58,228 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:47:58,229 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 02:47:58,458 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 02:47:58,459 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 420 treesize of output 400 [2023-04-01 02:47:58,481 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 02:47:58,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:47:58,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136412659] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:47:58,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1882623190] [2023-04-01 02:47:58,520 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 02:47:58,520 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:47:58,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:47:58,524 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:47:58,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:47:58,564 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 02:47:58,737 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 65 for LOIs [2023-04-01 02:47:58,761 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 02:47:58,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:47:58,768 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:03,740 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '258#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_main_~#volArray~0.base_BEFORE_CALL_3| Int)) (and (not (= (select (select |#memory_int| |v_main_~#volArray~0.base_BEFORE_CALL_3|) 0) 0)) (<= 3 (+ |v_main_~#volArray~0.base_BEFORE_CALL_3| |#StackHeapBarrier|)) (<= ~CELLCOUNT~0 (+ 2147483645 |v_main_~#volArray~0.base_BEFORE_CALL_3|)) (<= (+ |#StackHeapBarrier| 1) |v_main_~#volArray~0.base_BEFORE_CALL_3|) (<= 2 |v_main_~#volArray~0.base_BEFORE_CALL_3|) (<= 4 (+ |v_main_~#volArray~0.base_BEFORE_CALL_3| ~CELLCOUNT~0)))) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:03,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:03,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:03,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 8] total 22 [2023-04-01 02:48:03,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289171615] [2023-04-01 02:48:03,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:03,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-04-01 02:48:03,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:03,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-04-01 02:48:03,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1270, Unknown=2, NotChecked=0, Total=1406 [2023-04-01 02:48:03,744 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 02:48:04,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:04,273 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-04-01 02:48:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 02:48:04,273 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 02:48:04,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:04,275 INFO L225 Difference]: With dead ends: 35 [2023-04-01 02:48:04,275 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 02:48:04,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=263, Invalid=2087, Unknown=2, NotChecked=0, Total=2352 [2023-04-01 02:48:04,276 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:04,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 114 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:48:04,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 02:48:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2023-04-01 02:48:04,283 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 02:48:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-04-01 02:48:04,283 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 18 [2023-04-01 02:48:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:04,283 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-04-01 02:48:04,283 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 02:48:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-04-01 02:48:04,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 02:48:04,284 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:04,284 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 02:48:04,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:48:04,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:04,485 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:04,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1626788474, now seen corresponding path program 1 times [2023-04-01 02:48:04,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:04,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455763065] [2023-04-01 02:48:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:04,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:04,943 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 02:48:04,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:04,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455763065] [2023-04-01 02:48:04,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455763065] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:04,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853450209] [2023-04-01 02:48:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:04,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:04,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:04,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:48:04,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:48:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:05,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-01 02:48:05,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:05,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:48:05,164 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 02:48:05,221 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 76 [2023-04-01 02:48:05,226 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 87 [2023-04-01 02:48:05,231 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 14 treesize of output 18 [2023-04-01 02:48:05,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:48:05,239 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 28 [2023-04-01 02:48:05,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:48:05,257 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 28 [2023-04-01 02:48:05,296 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 23 treesize of output 14 [2023-04-01 02:48:05,306 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 02:48:05,527 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 65 treesize of output 45 [2023-04-01 02:48:05,565 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 02:48:05,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:05,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:48:05,660 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 02:48:05,724 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 180 treesize of output 159 [2023-04-01 02:48:05,733 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 02:48:05,733 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 119 treesize of output 95 [2023-04-01 02:48:05,748 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 13 treesize of output 4 [2023-04-01 02:48:05,779 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 02:48:05,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853450209] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:05,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211722591] [2023-04-01 02:48:05,781 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 02:48:05,781 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:05,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:05,781 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:05,781 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:05,822 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 02:48:06,146 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2023-04-01 02:48:06,152 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 02:48:06,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:48:06,159 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:12,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '563#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:12,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:12,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:12,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 9] total 26 [2023-04-01 02:48:12,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672435436] [2023-04-01 02:48:12,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:12,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 02:48:12,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:12,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 02:48:12,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1560, Unknown=4, NotChecked=0, Total=1722 [2023-04-01 02:48:12,255 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 02:48:23,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:23,364 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2023-04-01 02:48:23,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 02:48:23,365 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 02:48:23,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:23,367 INFO L225 Difference]: With dead ends: 39 [2023-04-01 02:48:23,367 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 02:48:23,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=318, Invalid=2640, Unknown=12, NotChecked=0, Total=2970 [2023-04-01 02:48:23,368 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 84 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:23,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 144 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:48:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 02:48:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-04-01 02:48:23,374 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 02:48:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-04-01 02:48:23,374 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 25 [2023-04-01 02:48:23,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:23,375 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-04-01 02:48:23,375 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 02:48:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-04-01 02:48:23,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 02:48:23,375 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:23,375 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 02:48:23,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:48:23,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 02:48:23,581 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:23,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:23,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1559444853, now seen corresponding path program 2 times [2023-04-01 02:48:23,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:23,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779577480] [2023-04-01 02:48:23,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:23,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:23,851 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 02:48:23,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:23,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779577480] [2023-04-01 02:48:23,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779577480] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:23,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103038152] [2023-04-01 02:48:23,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:48:23,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:23,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:23,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:48:23,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:48:23,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:48:23,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:48:23,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 02:48:23,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:24,017 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 0 case distinctions, treesize of input 35 treesize of output 42 [2023-04-01 02:48:24,027 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 18 treesize of output 7 [2023-04-01 02:48:24,033 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 02:48:24,155 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 37 [2023-04-01 02:48:24,190 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 02:48:24,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:24,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:48:24,298 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 02:48:24,329 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 02:48:24,329 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 24 treesize of output 12 [2023-04-01 02:48:24,335 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 02:48:24,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-04-01 02:48:24,353 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 02:48:24,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103038152] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:24,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [955077108] [2023-04-01 02:48:24,355 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 02:48:24,355 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:24,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:24,355 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:24,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:24,379 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 02:48:24,749 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2023-04-01 02:48:24,754 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 02:48:24,757 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:48:24,761 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:25,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '928#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:25,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:25,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:25,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 10] total 24 [2023-04-01 02:48:25,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879051615] [2023-04-01 02:48:25,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:25,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 02:48:25,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:25,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 02:48:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 02:48:25,775 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 10 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2023-04-01 02:48:26,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:26,483 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-04-01 02:48:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 02:48:26,484 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 10 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 32 [2023-04-01 02:48:26,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:26,485 INFO L225 Difference]: With dead ends: 49 [2023-04-01 02:48:26,485 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 02:48:26,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=291, Invalid=2571, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 02:48:26,486 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 90 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:26,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 170 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 02:48:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 02:48:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2023-04-01 02:48:26,493 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 02:48:26,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2023-04-01 02:48:26,494 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 32 [2023-04-01 02:48:26,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:26,494 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2023-04-01 02:48:26,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 10 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2023-04-01 02:48:26,494 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2023-04-01 02:48:26,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 02:48:26,495 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:26,495 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 02:48:26,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:48:26,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:26,702 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:26,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:26,703 INFO L85 PathProgramCache]: Analyzing trace with hash -816001702, now seen corresponding path program 3 times [2023-04-01 02:48:26,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:26,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033031942] [2023-04-01 02:48:26,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:26,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:26,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:26,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033031942] [2023-04-01 02:48:26,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033031942] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:26,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981948261] [2023-04-01 02:48:26,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:48:26,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:26,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:26,909 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:48:26,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:48:26,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:48:26,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:48:26,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 02:48:26,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:27,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:27,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981948261] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:27,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [745301503] [2023-04-01 02:48:27,299 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 02:48:27,299 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:27,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:27,300 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:27,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:27,322 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 02:48:27,615 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2023-04-01 02:48:27,621 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 02:48:27,623 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:48:27,627 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:28,568 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1363#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:28,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:28,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:28,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-04-01 02:48:28,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823136291] [2023-04-01 02:48:28,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:28,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 02:48:28,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:28,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 02:48:28,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1405, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 02:48:28,570 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 14 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 02:48:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:28,895 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2023-04-01 02:48:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 02:48:28,896 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 14 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 39 [2023-04-01 02:48:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:28,897 INFO L225 Difference]: With dead ends: 74 [2023-04-01 02:48:28,897 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 02:48:28,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 02:48:28,899 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 75 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:28,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 66 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:48:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 02:48:28,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-04-01 02:48:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 02:48:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2023-04-01 02:48:28,906 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2023-04-01 02:48:28,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:28,906 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2023-04-01 02:48:28,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 14 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 02:48:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2023-04-01 02:48:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 02:48:28,907 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:28,907 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:28,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 02:48:29,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:29,112 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:29,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:29,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1860494948, now seen corresponding path program 4 times [2023-04-01 02:48:29,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:29,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146812083] [2023-04-01 02:48:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:29,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:29,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:29,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146812083] [2023-04-01 02:48:29,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146812083] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:29,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221197797] [2023-04-01 02:48:29,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:48:29,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:29,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:29,749 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:48:29,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 02:48:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:29,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 46 conjunts are in the unsatisfiable core [2023-04-01 02:48:29,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:30,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:48:30,001 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 02:48:30,078 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 78 [2023-04-01 02:48:30,083 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 85 [2023-04-01 02:48:30,087 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 56 treesize of output 76 [2023-04-01 02:48:30,093 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 24 treesize of output 14 [2023-04-01 02:48:30,116 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 31 treesize of output 16 [2023-04-01 02:48:30,124 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 34 treesize of output 20 [2023-04-01 02:48:30,140 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 23 treesize of output 14 [2023-04-01 02:48:30,152 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 69 treesize of output 73 [2023-04-01 02:48:30,160 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 20 treesize of output 9 [2023-04-01 02:48:30,162 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 9 treesize of output 7 [2023-04-01 02:48:30,174 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 43 treesize of output 33 [2023-04-01 02:48:30,587 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 65 treesize of output 45 [2023-04-01 02:48:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:30,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:48:30,797 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:48:30,797 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 02:48:30,875 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:48:30,876 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 4 case distinctions, treesize of input 117 treesize of output 135 [2023-04-01 02:48:30,900 INFO L321 Elim1Store]: treesize reduction 13, result has 75.5 percent of original size [2023-04-01 02:48:30,900 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 4 case distinctions, treesize of input 39 treesize of output 68 [2023-04-01 02:48:30,941 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 56 treesize of output 41 [2023-04-01 02:48:30,958 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 56 treesize of output 41 [2023-04-01 02:48:30,978 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 02:48:30,980 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 02:48:30,991 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 35 treesize of output 23 [2023-04-01 02:48:30,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 23 treesize of output 1 [2023-04-01 02:48:31,009 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 11 treesize of output 4 [2023-04-01 02:48:31,014 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 02:48:31,025 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 02:48:31,025 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 4 case distinctions, treesize of input 57 treesize of output 83 [2023-04-01 02:48:31,034 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 02:48:31,037 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 02:48:31,049 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 02:48:31,057 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 116 treesize of output 104 [2023-04-01 02:48:31,061 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 02:48:31,062 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 72 treesize of output 45 [2023-04-01 02:48:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 02:48:31,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221197797] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:48:31,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1311355324] [2023-04-01 02:48:31,135 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-04-01 02:48:31,135 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:48:31,136 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:48:31,136 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:48:31,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:48:31,163 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 22 for LOIs [2023-04-01 02:48:31,465 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 24 for LOIs [2023-04-01 02:48:31,471 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 38 for LOIs [2023-04-01 02:48:31,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-01 02:48:31,479 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:48:34,243 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1844#(and (<= 1 |#StackHeapBarrier|) (<= 2 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:48:34,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:48:34,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:48:34,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 12] total 35 [2023-04-01 02:48:34,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51771392] [2023-04-01 02:48:34,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:48:34,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 02:48:34,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:48:34,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 02:48:34,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=2345, Unknown=2, NotChecked=0, Total=2550 [2023-04-01 02:48:34,245 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 35 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 13 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-01 02:48:36,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 02:48:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:48:38,977 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-04-01 02:48:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 02:48:38,978 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 13 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 40 [2023-04-01 02:48:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:48:38,978 INFO L225 Difference]: With dead ends: 58 [2023-04-01 02:48:38,978 INFO L226 Difference]: Without dead ends: 56 [2023-04-01 02:48:38,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 72 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=490, Invalid=4336, Unknown=4, NotChecked=0, Total=4830 [2023-04-01 02:48:38,980 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 100 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 77 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 02:48:38,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 224 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 465 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 02:48:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-04-01 02:48:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2023-04-01 02:48:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 02:48:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-04-01 02:48:39,002 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 40 [2023-04-01 02:48:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:48:39,002 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-04-01 02:48:39,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 13 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2023-04-01 02:48:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-04-01 02:48:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 02:48:39,003 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:48:39,003 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:48:39,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 02:48:39,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:39,203 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:48:39,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:48:39,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1468420961, now seen corresponding path program 5 times [2023-04-01 02:48:39,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:48:39,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922509490] [2023-04-01 02:48:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:48:39,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:48:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:48:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 02:48:39,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:48:39,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922509490] [2023-04-01 02:48:39,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922509490] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:48:39,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704128611] [2023-04-01 02:48:39,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:48:39,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:48:39,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:48:39,761 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:48:39,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 02:48:39,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 02:48:39,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:48:39,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 02:48:39,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:48:40,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 02:48:40,031 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 02:48:40,060 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 75 treesize of output 73 [2023-04-01 02:48:40,064 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 02:48:40,082 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 02:48:40,095 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 95 [2023-04-01 02:48:40,100 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 28 treesize of output 58 [2023-04-01 02:48:40,165 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 27 treesize of output 16 [2023-04-01 02:48:40,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 1 [2023-04-01 02:48:40,179 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 18 treesize of output 7 [2023-04-01 02:48:40,182 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