/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-crafted/bAnd2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:50:18,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:50:18,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:50:18,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:50:18,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:50:18,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:50:18,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:50:18,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:50:18,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:50:18,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:50:18,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:50:18,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 02:50:18,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 02:50:18,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 02:50:18,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 02:50:18,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 02:50:18,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 02:50:18,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 02:50:18,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 02:50:18,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 02:50:18,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 02:50:18,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 02:50:18,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 02:50:18,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 02:50:18,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 02:50:18,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 02:50:18,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 02:50:18,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 02:50:18,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 02:50:18,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 02:50:18,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 02:50:18,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 02:50:18,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 02:50:18,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:50:18,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:50:18,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:50:18,844 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 02:50:18,878 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:50:18,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:50:18,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:50:18,879 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:50:18,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:50:18,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:50:18,880 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:50:18,880 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:50:18,880 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:50:18,880 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:50:18,881 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:50:18,881 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:50:18,881 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:50:18,882 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:50:18,882 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:50:18,882 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:50:18,882 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:50:18,882 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:50:18,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:50:18,883 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:50:18,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:50:18,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:50:18,884 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:50:18,884 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:50:18,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:50:18,884 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:50:18,884 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:50:18,885 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:50:18,885 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:50:18,885 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:50:18,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:50:18,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:50:18,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:50:18,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:50:18,886 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:50:18,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:50:18,886 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:50:18,886 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:50:18,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:50:18,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:50:18,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:50:18,887 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:50:19,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:50:19,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:50:19,126 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:50:19,127 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:50:19,128 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:50:19,129 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/bAnd2.i [2023-04-01 02:50:20,322 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:50:20,497 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:50:20,498 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/bAnd2.i [2023-04-01 02:50:20,503 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/370cd6afb/38924eed378f4c4fb52ac671bfca3efd/FLAGab516389b [2023-04-01 02:50:20,521 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/370cd6afb/38924eed378f4c4fb52ac671bfca3efd [2023-04-01 02:50:20,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:50:20,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:50:20,535 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:50:20,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:50:20,539 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:50:20,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:50:20" (1/1) ... [2023-04-01 02:50:20,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@756b045a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:50:20, skipping insertion in model container [2023-04-01 02:50:20,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:50:20" (1/1) ... [2023-04-01 02:50:20,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:50:20,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:50:20,685 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-crafted/bAnd2.i[1296,1309] [2023-04-01 02:50:20,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:50:20,696 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:50:20,712 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-crafted/bAnd2.i[1296,1309] [2023-04-01 02:50:20,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:50:20,725 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:50:20,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:50:20 WrapperNode [2023-04-01 02:50:20,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:50:20,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:50:20,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:50:20,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:50:20,735 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:50:20" (1/1) ... [2023-04-01 02:50:20,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:50:20" (1/1) ... [2023-04-01 02:50:20,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:50:20" (1/1) ... [2023-04-01 02:50:20,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:50:20" (1/1) ... [2023-04-01 02:50:20,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:50:20" (1/1) ... [2023-04-01 02:50:20,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:50:20" (1/1) ... [2023-04-01 02:50:20,752 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:50:20" (1/1) ... [2023-04-01 02:50:20,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:50:20" (1/1) ... [2023-04-01 02:50:20,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:50:20,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:50:20,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:50:20,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:50:20,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:50:20" (1/1) ... [2023-04-01 02:50:20,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:50:20,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:20,791 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 02:50:20,802 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 02:50:20,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:50:20,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:50:20,843 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:50:20,843 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2023-04-01 02:50:20,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:50:20,843 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:50:20,843 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:50:20,844 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 02:50:20,844 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 02:50:20,844 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:50:20,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:50:20,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:50:20,844 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2023-04-01 02:50:20,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:50:20,844 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:50:20,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 02:50:20,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:50:20,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:50:20,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:50:20,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:50:20,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:50:20,951 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:50:20,953 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:50:21,211 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:50:21,298 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:50:21,298 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 02:50:21,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:50:21 BoogieIcfgContainer [2023-04-01 02:50:21,307 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:50:21,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:50:21,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:50:21,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:50:21,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:50:20" (1/3) ... [2023-04-01 02:50:21,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22be8440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:50:21, skipping insertion in model container [2023-04-01 02:50:21,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:50:20" (2/3) ... [2023-04-01 02:50:21,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22be8440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:50:21, skipping insertion in model container [2023-04-01 02:50:21,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:50:21" (3/3) ... [2023-04-01 02:50:21,315 INFO L112 eAbstractionObserver]: Analyzing ICFG bAnd2.i [2023-04-01 02:50:21,330 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:50:21,331 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:50:21,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:50:21,398 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;@3602d52c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:50:21,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:50:21,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 02:50:21,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 02:50:21,408 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:21,409 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:21,409 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:21,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:21,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1394842051, now seen corresponding path program 1 times [2023-04-01 02:50:21,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:21,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603004582] [2023-04-01 02:50:21,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:21,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 02:50:21,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:21,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603004582] [2023-04-01 02:50:21,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603004582] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:50:21,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:50:21,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:50:21,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138253211] [2023-04-01 02:50:21,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:50:21,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:50:21,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:21,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:50:21,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:50:21,776 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:50:21,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:21,822 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-04-01 02:50:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:50:21,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-04-01 02:50:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:21,831 INFO L225 Difference]: With dead ends: 41 [2023-04-01 02:50:21,831 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 02:50:21,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:50:21,836 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:21,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:50:21,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 02:50:21,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 02:50:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:50:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-04-01 02:50:21,872 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2023-04-01 02:50:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:21,873 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-04-01 02:50:21,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:50:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-04-01 02:50:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 02:50:21,876 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:21,877 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:21,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:50:21,877 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:21,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:21,878 INFO L85 PathProgramCache]: Analyzing trace with hash -2104731495, now seen corresponding path program 1 times [2023-04-01 02:50:21,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:21,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057531775] [2023-04-01 02:50:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:21,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 02:50:22,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:22,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057531775] [2023-04-01 02:50:22,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057531775] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:50:22,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934644280] [2023-04-01 02:50:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:22,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:22,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:22,037 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 02:50:22,040 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 02:50:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:22,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 02:50:22,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:22,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 02:50:22,186 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:50:22,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934644280] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:50:22,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:50:22,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 02:50:22,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882657390] [2023-04-01 02:50:22,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:50:22,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:50:22,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:22,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:50:22,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:50:22,197 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:50:22,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:22,224 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2023-04-01 02:50:22,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:50:22,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-04-01 02:50:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:22,226 INFO L225 Difference]: With dead ends: 33 [2023-04-01 02:50:22,227 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 02:50:22,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:50:22,231 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:22,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:50:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 02:50:22,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-04-01 02:50:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:50:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-04-01 02:50:22,256 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2023-04-01 02:50:22,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:22,256 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-04-01 02:50:22,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:50:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-04-01 02:50:22,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 02:50:22,258 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:22,258 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:22,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 02:50:22,465 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 02:50:22,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:22,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:22,466 INFO L85 PathProgramCache]: Analyzing trace with hash 56768948, now seen corresponding path program 1 times [2023-04-01 02:50:22,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:22,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971704512] [2023-04-01 02:50:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:22,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:50:22,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:22,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971704512] [2023-04-01 02:50:22,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971704512] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:50:22,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874051114] [2023-04-01 02:50:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:22,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:22,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:22,603 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 02:50:22,606 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 02:50:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:22,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 02:50:22,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 02:50:22,710 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 02:50:22,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874051114] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:50:22,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 02:50:22,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 02:50:22,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129417278] [2023-04-01 02:50:22,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:50:22,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:50:22,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:22,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:50:22,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:50:22,712 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:50:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:22,732 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2023-04-01 02:50:22,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:50:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2023-04-01 02:50:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:22,733 INFO L225 Difference]: With dead ends: 31 [2023-04-01 02:50:22,733 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 02:50:22,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 02:50:22,735 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:22,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:50:22,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 02:50:22,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 02:50:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:50:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-04-01 02:50:22,745 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-04-01 02:50:22,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:22,746 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-04-01 02:50:22,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 02:50:22,747 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-04-01 02:50:22,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 02:50:22,747 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:22,747 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:22,759 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 02:50:22,954 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 02:50:22,955 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:22,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:22,955 INFO L85 PathProgramCache]: Analyzing trace with hash -876765341, now seen corresponding path program 1 times [2023-04-01 02:50:22,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:22,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539966654] [2023-04-01 02:50:22,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:22,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 02:50:23,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:23,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539966654] [2023-04-01 02:50:23,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539966654] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:50:23,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128482590] [2023-04-01 02:50:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:23,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:23,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:23,062 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 02:50:23,065 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 02:50:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:23,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:50:23,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 02:50:23,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:50:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 02:50:23,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128482590] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:50:23,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039925329] [2023-04-01 02:50:23,252 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:50:23,252 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:50:23,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:50:23,260 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:50:23,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:50:23,357 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:50:24,273 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 19 for LOIs [2023-04-01 02:50:24,519 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:50:24,529 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:50:25,740 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '631#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:50:25,741 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:50:25,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:50:25,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:50:25,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910513828] [2023-04-01 02:50:25,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:50:25,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:50:25,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:25,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:50:25,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:50:25,743 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:25,781 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2023-04-01 02:50:25,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:50:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 29 [2023-04-01 02:50:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:25,801 INFO L225 Difference]: With dead ends: 40 [2023-04-01 02:50:25,801 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 02:50:25,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:50:25,803 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:25,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:50:25,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 02:50:25,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-04-01 02:50:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:50:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-04-01 02:50:25,807 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2023-04-01 02:50:25,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:25,807 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-04-01 02:50:25,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:25,808 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-04-01 02:50:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 02:50:25,808 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:25,808 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:25,850 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 02:50:26,014 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 02:50:26,014 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:26,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:26,015 INFO L85 PathProgramCache]: Analyzing trace with hash -566132467, now seen corresponding path program 2 times [2023-04-01 02:50:26,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:26,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225115705] [2023-04-01 02:50:26,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:26,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:50:26,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:26,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225115705] [2023-04-01 02:50:26,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225115705] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:50:26,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381417234] [2023-04-01 02:50:26,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:50:26,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:26,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:26,086 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 02:50:26,108 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 02:50:26,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 02:50:26,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:50:26,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:50:26,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:50:26,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:50:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-04-01 02:50:26,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381417234] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:50:26,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [951278567] [2023-04-01 02:50:26,195 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:50:26,195 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:50:26,195 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:50:26,195 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:50:26,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:50:26,218 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:50:26,708 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 19 for LOIs [2023-04-01 02:50:26,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:50:26,944 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:50:28,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '950#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:50:28,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:50:28,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:50:28,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:50:28,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024925661] [2023-04-01 02:50:28,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:50:28,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:50:28,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:28,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:50:28,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:50:28,059 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:28,088 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-04-01 02:50:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:50:28,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 32 [2023-04-01 02:50:28,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:28,090 INFO L225 Difference]: With dead ends: 42 [2023-04-01 02:50:28,090 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 02:50:28,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=399, Unknown=8, NotChecked=0, Total=506 [2023-04-01 02:50:28,092 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:28,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:50:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 02:50:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 02:50:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:50:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-01 02:50:28,096 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2023-04-01 02:50:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:28,096 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-01 02:50:28,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-01 02:50:28,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 02:50:28,099 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:28,099 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:28,109 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 02:50:28,305 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 02:50:28,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:28,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:28,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1093951224, now seen corresponding path program 3 times [2023-04-01 02:50:28,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:28,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555444322] [2023-04-01 02:50:28,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:28,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-04-01 02:50:28,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:28,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555444322] [2023-04-01 02:50:28,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555444322] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:50:28,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442854342] [2023-04-01 02:50:28,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:50:28,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:28,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:28,434 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 02:50:28,437 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 02:50:28,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:50:28,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:50:28,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:50:28,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 02:50:28,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:50:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-04-01 02:50:28,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442854342] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:50:28,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065695381] [2023-04-01 02:50:28,621 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:50:28,621 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:50:28,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:50:28,622 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:50:28,622 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:50:28,669 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:50:29,134 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 19 for LOIs [2023-04-01 02:50:29,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:50:29,305 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:50:30,396 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1340#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:50:30,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:50:30,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:50:30,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-04-01 02:50:30,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851227579] [2023-04-01 02:50:30,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:50:30,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 02:50:30,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:30,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 02:50:30,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=713, Unknown=8, NotChecked=0, Total=870 [2023-04-01 02:50:30,399 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 02:50:30,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:30,435 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-04-01 02:50:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 02:50:30,435 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 41 [2023-04-01 02:50:30,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:30,436 INFO L225 Difference]: With dead ends: 53 [2023-04-01 02:50:30,436 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 02:50:30,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=149, Invalid=713, Unknown=8, NotChecked=0, Total=870 [2023-04-01 02:50:30,437 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:30,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:50:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 02:50:30,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-01 02:50:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:50:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-04-01 02:50:30,442 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 41 [2023-04-01 02:50:30,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:30,442 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-04-01 02:50:30,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-04-01 02:50:30,443 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-04-01 02:50:30,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 02:50:30,443 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:30,443 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:30,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 02:50:30,650 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 02:50:30,650 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:30,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:30,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1976105629, now seen corresponding path program 4 times [2023-04-01 02:50:30,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:30,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536749524] [2023-04-01 02:50:30,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:30,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 02:50:30,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:30,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536749524] [2023-04-01 02:50:30,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536749524] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:50:30,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055593616] [2023-04-01 02:50:30,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:50:30,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:30,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:30,996 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 02:50:30,999 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 02:50:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:31,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 02:50:31,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 02:50:31,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:50:31,288 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 02:50:31,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055593616] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:50:31,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [549991175] [2023-04-01 02:50:31,290 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:50:31,290 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:50:31,290 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:50:31,290 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:50:31,290 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:50:31,320 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:50:31,780 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 19 for LOIs [2023-04-01 02:50:31,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:50:31,940 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:50:32,960 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1819#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:50:32,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:50:32,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:50:32,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 02:50:32,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542633912] [2023-04-01 02:50:32,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:50:32,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 02:50:32,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:32,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 02:50:32,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1254, Unknown=8, NotChecked=0, Total=1640 [2023-04-01 02:50:32,964 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:33,004 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2023-04-01 02:50:33,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 02:50:33,005 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-04-01 02:50:33,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:33,006 INFO L225 Difference]: With dead ends: 66 [2023-04-01 02:50:33,006 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 02:50:33,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=378, Invalid=1254, Unknown=8, NotChecked=0, Total=1640 [2023-04-01 02:50:33,007 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:33,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:50:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 02:50:33,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 02:50:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:50:33,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-04-01 02:50:33,013 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 48 [2023-04-01 02:50:33,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:33,013 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-04-01 02:50:33,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-04-01 02:50:33,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 02:50:33,014 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:33,014 INFO L195 NwaCegarLoop]: trace histogram [22, 12, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:33,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 02:50:33,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:33,217 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:33,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:33,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1857902051, now seen corresponding path program 5 times [2023-04-01 02:50:33,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:33,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399125871] [2023-04-01 02:50:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:33,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2023-04-01 02:50:33,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:33,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399125871] [2023-04-01 02:50:33,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399125871] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:50:33,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126628839] [2023-04-01 02:50:33,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:50:33,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:33,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:33,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:50:33,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 02:50:33,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:50:33,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:50:33,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:50:33,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:34,027 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-04-01 02:50:34,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:50:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2023-04-01 02:50:34,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126628839] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:50:34,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1533318379] [2023-04-01 02:50:34,121 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:50:34,121 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:50:34,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:50:34,122 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:50:34,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:50:34,145 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:50:34,541 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 19 for LOIs [2023-04-01 02:50:34,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:50:34,695 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:50:35,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2430#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:50:35,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:50:35,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:50:35,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-04-01 02:50:35,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693304123] [2023-04-01 02:50:35,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:50:35,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 02:50:35,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:35,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 02:50:35,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2099, Unknown=8, NotChecked=0, Total=2550 [2023-04-01 02:50:35,906 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:35,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:35,984 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2023-04-01 02:50:35,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-04-01 02:50:35,985 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 60 [2023-04-01 02:50:35,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:35,985 INFO L225 Difference]: With dead ends: 73 [2023-04-01 02:50:35,986 INFO L226 Difference]: Without dead ends: 54 [2023-04-01 02:50:35,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=443, Invalid=2099, Unknown=8, NotChecked=0, Total=2550 [2023-04-01 02:50:35,987 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:35,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:50:35,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-04-01 02:50:35,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-04-01 02:50:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:50:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-04-01 02:50:35,994 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 60 [2023-04-01 02:50:35,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:35,994 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-04-01 02:50:35,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:35,994 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-04-01 02:50:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 02:50:35,995 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:35,995 INFO L195 NwaCegarLoop]: trace histogram [30, 23, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:36,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 02:50:36,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:36,201 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:36,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:36,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1917987815, now seen corresponding path program 6 times [2023-04-01 02:50:36,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:36,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433611534] [2023-04-01 02:50:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:36,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:50:37,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:37,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433611534] [2023-04-01 02:50:37,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433611534] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:50:37,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706500118] [2023-04-01 02:50:37,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:50:37,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:37,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:37,085 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:50:37,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 02:50:37,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:50:37,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:50:37,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 02:50:37,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:50:37,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:50:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:50:37,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706500118] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:50:37,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020981390] [2023-04-01 02:50:37,994 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:50:37,994 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:50:37,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:50:37,995 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:50:37,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:50:38,014 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:50:38,397 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 19 for LOIs [2023-04-01 02:50:38,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:50:38,554 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:50:39,728 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3199#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:50:39,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:50:39,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:50:39,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-04-01 02:50:39,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969787117] [2023-04-01 02:50:39,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:50:39,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-01 02:50:39,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:39,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-01 02:50:39,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1353, Invalid=3061, Unknown=8, NotChecked=0, Total=4422 [2023-04-01 02:50:39,733 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:39,800 INFO L93 Difference]: Finished difference Result 104 states and 136 transitions. [2023-04-01 02:50:39,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-04-01 02:50:39,801 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 79 [2023-04-01 02:50:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:39,802 INFO L225 Difference]: With dead ends: 104 [2023-04-01 02:50:39,803 INFO L226 Difference]: Without dead ends: 79 [2023-04-01 02:50:39,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1353, Invalid=3061, Unknown=8, NotChecked=0, Total=4422 [2023-04-01 02:50:39,808 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:39,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:50:39,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-04-01 02:50:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-04-01 02:50:39,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:50:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2023-04-01 02:50:39,823 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 79 [2023-04-01 02:50:39,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:39,823 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2023-04-01 02:50:39,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:39,823 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2023-04-01 02:50:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-01 02:50:39,824 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:39,824 INFO L195 NwaCegarLoop]: trace histogram [48, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:39,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 02:50:40,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-04-01 02:50:40,025 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:40,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:40,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1644461443, now seen corresponding path program 7 times [2023-04-01 02:50:40,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:40,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782083224] [2023-04-01 02:50:40,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:40,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:50:42,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:42,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782083224] [2023-04-01 02:50:42,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782083224] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:50:42,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58895108] [2023-04-01 02:50:42,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:50:42,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:42,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:42,401 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:50:42,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 02:50:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:42,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 50 conjunts are in the unsatisfiable core [2023-04-01 02:50:42,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:50:42,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:50:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:50:45,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58895108] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:50:45,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1503328182] [2023-04-01 02:50:45,116 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:50:45,116 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:50:45,116 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:50:45,116 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:50:45,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:50:45,134 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:50:45,488 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 19 for LOIs [2023-04-01 02:50:45,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:50:45,620 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:50:47,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4280#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:50:47,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:50:47,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:50:47,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-04-01 02:50:47,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971829402] [2023-04-01 02:50:47,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:50:47,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-04-01 02:50:47,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:47,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-04-01 02:50:47,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5128, Invalid=8436, Unknown=8, NotChecked=0, Total=13572 [2023-04-01 02:50:47,095 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:47,215 INFO L93 Difference]: Finished difference Result 154 states and 211 transitions. [2023-04-01 02:50:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-04-01 02:50:47,216 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 104 [2023-04-01 02:50:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:47,217 INFO L225 Difference]: With dead ends: 154 [2023-04-01 02:50:47,217 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 02:50:47,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2730 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5128, Invalid=8436, Unknown=8, NotChecked=0, Total=13572 [2023-04-01 02:50:47,221 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:47,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 106 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:50:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 02:50:47,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-04-01 02:50:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 121 states have (on average 1.024793388429752) internal successors, (124), 121 states have internal predecessors, (124), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:50:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2023-04-01 02:50:47,230 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 104 [2023-04-01 02:50:47,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:47,230 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2023-04-01 02:50:47,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:47,231 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2023-04-01 02:50:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-04-01 02:50:47,233 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:47,233 INFO L195 NwaCegarLoop]: trace histogram [98, 30, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:47,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 02:50:47,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 02:50:47,446 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:47,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:47,446 INFO L85 PathProgramCache]: Analyzing trace with hash -681633213, now seen corresponding path program 8 times [2023-04-01 02:50:47,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:47,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404752843] [2023-04-01 02:50:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:47,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:50:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2023-04-01 02:50:53,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:50:53,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404752843] [2023-04-01 02:50:53,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404752843] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:50:53,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224457376] [2023-04-01 02:50:53,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:50:53,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:50:53,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:50:53,805 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:50:53,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 02:50:53,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:50:53,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:50:53,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 02:50:53,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:50:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 246 proven. 3 refuted. 0 times theorem prover too weak. 5139 trivial. 0 not checked. [2023-04-01 02:50:54,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:50:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5388 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5385 trivial. 0 not checked. [2023-04-01 02:50:54,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224457376] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:50:54,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770663304] [2023-04-01 02:50:54,234 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-04-01 02:50:54,234 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:50:54,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:50:54,235 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:50:54,235 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:50:54,253 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-01 02:50:54,640 INFO L197 IcfgInterpreter]: Interpreting procedure bAnd with input of size 19 for LOIs [2023-04-01 02:50:54,758 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 02:50:54,762 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:50:56,733 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5867#(and (<= 1 |#StackHeapBarrier|) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (or (not (= main_~ret~0 main_~ret2~0)) (not (= main_~ret~0 main_~ret5~0))) (<= 0 (+ main_~ret5~0 2147483648)) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= |main_~#x~0.offset| 0) (<= 1000 main_~i~1) (= |#NULL.offset| 0) (<= 999 main_~i~2) (<= (+ |#StackHeapBarrier| 1) |main_~#x~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 02:50:56,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:50:56,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:50:56,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 5, 5] total 107 [2023-04-01 02:50:56,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060278947] [2023-04-01 02:50:56,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:50:56,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2023-04-01 02:50:56,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:50:56,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2023-04-01 02:50:56,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5155, Invalid=9843, Unknown=8, NotChecked=0, Total=15006 [2023-04-01 02:50:56,739 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:56,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:50:56,887 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2023-04-01 02:50:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-04-01 02:50:56,889 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 154 [2023-04-01 02:50:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:50:56,890 INFO L225 Difference]: With dead ends: 159 [2023-04-01 02:50:56,890 INFO L226 Difference]: Without dead ends: 134 [2023-04-01 02:50:56,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5155, Invalid=9843, Unknown=8, NotChecked=0, Total=15006 [2023-04-01 02:50:56,892 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:50:56,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 121 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:50:56,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-04-01 02:50:56,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-04-01 02:50:56,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 02:50:56,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2023-04-01 02:50:56,901 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 154 [2023-04-01 02:50:56,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:50:56,901 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2023-04-01 02:50:56,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.1775700934579438) internal successors, (126), 107 states have internal predecessors, (126), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 02:50:56,902 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2023-04-01 02:50:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-04-01 02:50:56,903 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:50:56,903 INFO L195 NwaCegarLoop]: trace histogram [99, 30, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:50:56,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 02:50:57,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-04-01 02:50:57,109 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:50:57,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:50:57,109 INFO L85 PathProgramCache]: Analyzing trace with hash 294533593, now seen corresponding path program 9 times [2023-04-01 02:50:57,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:50:57,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21976848] [2023-04-01 02:50:57,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:50:57,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:50:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:51:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-04-01 02:51:02,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:51:02,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21976848] [2023-04-01 02:51:02,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21976848] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:51:02,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265832126] [2023-04-01 02:51:02,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:51:02,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:51:02,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:51:02,836 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:51:02,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 02:51:03,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:51:03,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:51:03,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 101 conjunts are in the unsatisfiable core [2023-04-01 02:51:03,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:51:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5505 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-04-01 02:51:03,321 INFO L327 TraceCheckSpWp]: Computing backward predicates...