/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/loops-crafted-1/nested_delay_notd2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 22:24:45,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 22:24:45,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 22:24:45,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 22:24:45,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 22:24:45,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 22:24:45,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 22:24:45,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 22:24:45,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 22:24:45,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 22:24:45,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 22:24:45,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 22:24:45,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 22:24:45,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 22:24:45,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 22:24:45,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 22:24:45,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 22:24:45,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 22:24:45,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 22:24:45,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 22:24:45,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 22:24:45,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 22:24:45,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 22:24:45,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 22:24:45,153 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 22:24:45,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 22:24:45,156 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 22:24:45,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 22:24:45,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 22:24:45,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 22:24:45,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 22:24:45,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 22:24:45,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 22:24:45,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 22:24:45,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 22:24:45,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 22:24:45,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 22:24:45,196 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 22:24:45,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 22:24:45,197 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 22:24:45,197 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 22:24:45,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 22:24:45,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 22:24:45,198 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 22:24:45,198 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 22:24:45,198 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 22:24:45,198 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 22:24:45,199 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 22:24:45,199 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 22:24:45,199 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 22:24:45,199 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 22:24:45,199 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 22:24:45,199 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 22:24:45,199 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 22:24:45,200 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 22:24:45,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 22:24:45,200 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 22:24:45,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 22:24:45,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 22:24:45,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 22:24:45,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 22:24:45,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 22:24:45,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 22:24:45,201 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 22:24:45,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 22:24:45,201 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 22:24:45,201 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 22:24:45,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 22:24:45,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 22:24:45,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:24:45,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 22:24:45,202 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 22:24:45,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 22:24:45,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 22:24:45,202 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 22:24:45,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 22:24:45,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 22:24:45,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 22:24:45,203 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 22:24:45,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 22:24:45,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 22:24:45,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 22:24:45,444 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 22:24:45,444 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 22:24:45,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c [2023-04-02 22:24:46,622 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 22:24:46,780 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 22:24:46,781 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c [2023-04-02 22:24:46,785 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa62b81d3/3519c40e88074ad8a828ebf3b86cea1f/FLAGa346746da [2023-04-02 22:24:46,802 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa62b81d3/3519c40e88074ad8a828ebf3b86cea1f [2023-04-02 22:24:46,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 22:24:46,806 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 22:24:46,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 22:24:46,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 22:24:46,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 22:24:46,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:24:46" (1/1) ... [2023-04-02 22:24:46,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@95d7f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:46, skipping insertion in model container [2023-04-02 22:24:46,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 10:24:46" (1/1) ... [2023-04-02 22:24:46,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 22:24:46,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 22:24:46,984 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/loops-crafted-1/nested_delay_notd2.c[468,481] [2023-04-02 22:24:46,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:24:47,004 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 22:24:47,016 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/loops-crafted-1/nested_delay_notd2.c[468,481] [2023-04-02 22:24:47,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 22:24:47,034 INFO L208 MainTranslator]: Completed translation [2023-04-02 22:24:47,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:47 WrapperNode [2023-04-02 22:24:47,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 22:24:47,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 22:24:47,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 22:24:47,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 22:24:47,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:47" (1/1) ... [2023-04-02 22:24:47,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:47" (1/1) ... [2023-04-02 22:24:47,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:47" (1/1) ... [2023-04-02 22:24:47,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:47" (1/1) ... [2023-04-02 22:24:47,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:47" (1/1) ... [2023-04-02 22:24:47,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:47" (1/1) ... [2023-04-02 22:24:47,059 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:47" (1/1) ... [2023-04-02 22:24:47,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:47" (1/1) ... [2023-04-02 22:24:47,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 22:24:47,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 22:24:47,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 22:24:47,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 22:24:47,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:47" (1/1) ... [2023-04-02 22:24:47,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 22:24:47,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:24:47,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 22:24:47,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 22:24:47,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 22:24:47,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 22:24:47,129 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 22:24:47,130 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 22:24:47,130 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 22:24:47,130 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 22:24:47,130 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 22:24:47,130 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 22:24:47,130 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 22:24:47,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 22:24:47,131 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 22:24:47,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 22:24:47,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 22:24:47,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 22:24:47,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 22:24:47,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 22:24:47,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 22:24:47,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 22:24:47,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 22:24:47,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 22:24:47,189 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 22:24:47,191 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 22:24:47,413 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 22:24:47,498 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 22:24:47,499 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-02 22:24:47,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:24:47 BoogieIcfgContainer [2023-04-02 22:24:47,501 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 22:24:47,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 22:24:47,503 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 22:24:47,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 22:24:47,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 10:24:46" (1/3) ... [2023-04-02 22:24:47,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffbdb5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:24:47, skipping insertion in model container [2023-04-02 22:24:47,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 10:24:47" (2/3) ... [2023-04-02 22:24:47,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffbdb5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 10:24:47, skipping insertion in model container [2023-04-02 22:24:47,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 10:24:47" (3/3) ... [2023-04-02 22:24:47,509 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_delay_notd2.c [2023-04-02 22:24:47,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 22:24:47,528 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 22:24:47,581 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 22:24:47,587 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;@33e8333b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 22:24:47,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 22:24:47,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 22:24:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-02 22:24:47,600 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:24:47,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:24:47,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:24:47,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:24:47,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1065726219, now seen corresponding path program 1 times [2023-04-02 22:24:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:24:47,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932569426] [2023-04-02 22:24:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:24:47,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:24:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:24:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:24:47,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:24:47,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932569426] [2023-04-02 22:24:47,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932569426] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 22:24:47,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 22:24:47,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 22:24:47,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893863501] [2023-04-02 22:24:47,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 22:24:47,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 22:24:47,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:24:48,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 22:24:48,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:24:48,030 INFO L87 Difference]: Start difference. First operand has 21 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:24:48,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:24:48,112 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2023-04-02 22:24:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 22:24:48,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-04-02 22:24:48,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:24:48,120 INFO L225 Difference]: With dead ends: 32 [2023-04-02 22:24:48,120 INFO L226 Difference]: Without dead ends: 20 [2023-04-02 22:24:48,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-04-02 22:24:48,126 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:24:48,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 23 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:24:48,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-02 22:24:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2023-04-02 22:24:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:24:48,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-04-02 22:24:48,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2023-04-02 22:24:48,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:24:48,159 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-04-02 22:24:48,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 22:24:48,160 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-04-02 22:24:48,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 22:24:48,161 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:24:48,161 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:24:48,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 22:24:48,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:24:48,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:24:48,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1088035662, now seen corresponding path program 1 times [2023-04-02 22:24:48,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:24:48,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701304357] [2023-04-02 22:24:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:24:48,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:24:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:24:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:24:48,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:24:48,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701304357] [2023-04-02 22:24:48,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701304357] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:24:48,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137297569] [2023-04-02 22:24:48,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:24:48,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:24:48,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:24:48,329 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:24:48,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 22:24:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:24:48,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 22:24:48,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:24:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:24:48,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:24:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:24:48,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137297569] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:24:48,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [397566343] [2023-04-02 22:24:48,587 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 22:24:48,588 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:24:48,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:24:48,597 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:24:48,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:24:48,711 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 16 for LOIs [2023-04-02 22:24:49,365 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 125 for LOIs [2023-04-02 22:24:49,379 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 26 for LOIs [2023-04-02 22:24:49,386 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 22:24:49,402 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:24:49,886 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '209#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:24:49,886 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:24:49,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:24:49,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-04-02 22:24:49,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413064787] [2023-04-02 22:24:49,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:24:49,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-02 22:24:49,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:24:49,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-02 22:24:49,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2023-04-02 22:24:49,890 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 22:24:49,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:24:49,946 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-04-02 22:24:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 22:24:49,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 16 [2023-04-02 22:24:49,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:24:49,947 INFO L225 Difference]: With dead ends: 33 [2023-04-02 22:24:49,947 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 22:24:49,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-04-02 22:24:49,949 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:24:49,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 30 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:24:49,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 22:24:49,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-04-02 22:24:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:24:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-02 22:24:49,954 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2023-04-02 22:24:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:24:49,955 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-02 22:24:49,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 22:24:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-02 22:24:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 22:24:49,955 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:24:49,956 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:24:49,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 22:24:50,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:24:50,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:24:50,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:24:50,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1070129867, now seen corresponding path program 2 times [2023-04-02 22:24:50,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:24:50,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591818592] [2023-04-02 22:24:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:24:50,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:24:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:24:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:24:50,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:24:50,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591818592] [2023-04-02 22:24:50,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591818592] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:24:50,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561720323] [2023-04-02 22:24:50,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:24:50,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:24:50,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:24:50,333 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:24:50,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 22:24:50,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 22:24:50,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:24:50,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 22:24:50,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:24:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:24:50,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:24:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:24:50,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561720323] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:24:50,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [942674145] [2023-04-02 22:24:50,552 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 22:24:50,552 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:24:50,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:24:50,552 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:24:50,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:24:50,599 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 16 for LOIs [2023-04-02 22:24:50,934 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 125 for LOIs [2023-04-02 22:24:50,937 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 26 for LOIs [2023-04-02 22:24:50,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 22:24:50,947 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:24:51,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '445#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:24:51,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:24:51,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:24:51,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-04-02 22:24:51,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246419923] [2023-04-02 22:24:51,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:24:51,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-02 22:24:51,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:24:51,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-02 22:24:51,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2023-04-02 22:24:51,407 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 22:24:51,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:24:51,527 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2023-04-02 22:24:51,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-02 22:24:51,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 19 [2023-04-02 22:24:51,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:24:51,528 INFO L225 Difference]: With dead ends: 42 [2023-04-02 22:24:51,529 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 22:24:51,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2023-04-02 22:24:51,530 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 22:24:51,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 37 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 22:24:51,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 22:24:51,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-04-02 22:24:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.1) internal successors, (22), 21 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 22:24:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-04-02 22:24:51,536 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 19 [2023-04-02 22:24:51,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:24:51,536 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-04-02 22:24:51,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 4 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-02 22:24:51,537 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-04-02 22:24:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 22:24:51,537 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:24:51,537 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:24:51,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 22:24:51,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-02 22:24:51,745 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:24:51,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:24:51,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1875954027, now seen corresponding path program 3 times [2023-04-02 22:24:51,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:24:51,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065522191] [2023-04-02 22:24:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:24:51,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:24:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:24:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:24:51,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:24:51,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065522191] [2023-04-02 22:24:51,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065522191] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:24:51,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145225354] [2023-04-02 22:24:51,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:24:51,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:24:51,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:24:51,980 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:24:52,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 22:24:52,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:24:52,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:24:52,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-02 22:24:52,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:24:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:24:53,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:24:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 22:24:55,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145225354] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:24:55,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709009947] [2023-04-02 22:24:55,573 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 22:24:55,573 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:24:55,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:24:55,574 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:24:55,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:24:55,601 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 16 for LOIs [2023-04-02 22:24:55,846 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 125 for LOIs [2023-04-02 22:24:55,850 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 26 for LOIs [2023-04-02 22:24:55,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 22:24:55,857 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:24:56,584 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '778#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:24:56,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:24:56,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:24:56,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 44 [2023-04-02 22:24:56,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789521575] [2023-04-02 22:24:56,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:24:56,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-04-02 22:24:56,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:24:56,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-04-02 22:24:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=2777, Unknown=0, NotChecked=0, Total=3192 [2023-04-02 22:24:56,587 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 44 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 22:24:58,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:24:58,942 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2023-04-02 22:24:58,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-02 22:24:58,943 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-04-02 22:24:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:24:58,944 INFO L225 Difference]: With dead ends: 84 [2023-04-02 22:24:58,944 INFO L226 Difference]: Without dead ends: 65 [2023-04-02 22:24:58,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2734 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1415, Invalid=8287, Unknown=0, NotChecked=0, Total=9702 [2023-04-02 22:24:58,948 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 74 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 22:24:58,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 128 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 22:24:58,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-04-02 22:24:58,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2023-04-02 22:24:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 22:24:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2023-04-02 22:24:58,965 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 25 [2023-04-02 22:24:58,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:24:58,965 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2023-04-02 22:24:58,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 22:24:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2023-04-02 22:24:58,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-04-02 22:24:58,967 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:24:58,967 INFO L195 NwaCegarLoop]: trace histogram [34, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:24:58,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 22:24:59,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:24:59,173 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:24:59,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:24:59,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1091525759, now seen corresponding path program 1 times [2023-04-02 22:24:59,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:24:59,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314798080] [2023-04-02 22:24:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:24:59,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:24:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:24:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 306 proven. 66 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2023-04-02 22:24:59,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:24:59,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314798080] [2023-04-02 22:24:59,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314798080] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:24:59,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960404055] [2023-04-02 22:24:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:24:59,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:24:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:24:59,550 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:24:59,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 22:24:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:24:59,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 22:24:59,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:24:59,843 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 302 proven. 66 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-04-02 22:24:59,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:25:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 306 proven. 66 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2023-04-02 22:25:00,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960404055] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:25:00,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [209915775] [2023-04-02 22:25:00,065 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 22:25:00,065 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:25:00,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:25:00,065 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:25:00,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:25:00,091 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 16 for LOIs [2023-04-02 22:25:01,321 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 82 for LOIs [2023-04-02 22:25:01,404 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 26 for LOIs [2023-04-02 22:25:01,407 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 22:25:01,412 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:25:02,502 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1551#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:25:02,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:25:02,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:25:02,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2023-04-02 22:25:02,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912196180] [2023-04-02 22:25:02,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:25:02,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-02 22:25:02,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:25:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-02 22:25:02,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=1861, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 22:25:02,506 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 22:25:02,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:25:02,783 INFO L93 Difference]: Finished difference Result 128 states and 163 transitions. [2023-04-02 22:25:02,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 22:25:02,784 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 63 [2023-04-02 22:25:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:25:02,786 INFO L225 Difference]: With dead ends: 128 [2023-04-02 22:25:02,786 INFO L226 Difference]: Without dead ends: 88 [2023-04-02 22:25:02,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=789, Invalid=2517, Unknown=0, NotChecked=0, Total=3306 [2023-04-02 22:25:02,788 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 22:25:02,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 51 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 22:25:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-02 22:25:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-04-02 22:25:02,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 22:25:02,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2023-04-02 22:25:02,808 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 63 [2023-04-02 22:25:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:25:02,808 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2023-04-02 22:25:02,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 22:25:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2023-04-02 22:25:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-02 22:25:02,810 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:25:02,810 INFO L195 NwaCegarLoop]: trace histogram [60, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:25:02,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 22:25:03,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:25:03,016 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:25:03,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:25:03,016 INFO L85 PathProgramCache]: Analyzing trace with hash 800969589, now seen corresponding path program 2 times [2023-04-02 22:25:03,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:25:03,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193409733] [2023-04-02 22:25:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:25:03,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:25:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:25:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1967 backedges. 6 proven. 1960 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 22:25:12,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:25:12,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193409733] [2023-04-02 22:25:12,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193409733] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:25:12,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657095531] [2023-04-02 22:25:12,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 22:25:12,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:25:12,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:25:12,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:25:12,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 22:25:13,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-04-02 22:25:13,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:25:13,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 159 conjunts are in the unsatisfiable core [2023-04-02 22:25:13,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:25:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1967 backedges. 18 proven. 1764 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2023-04-02 22:25:22,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 22:25:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1967 backedges. 161 proven. 1802 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 22:25:46,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657095531] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 22:25:46,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1108039981] [2023-04-02 22:25:46,043 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 22:25:46,043 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 22:25:46,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 22:25:46,043 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 22:25:46,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 22:25:46,065 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 16 for LOIs [2023-04-02 22:25:46,945 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 82 for LOIs [2023-04-02 22:25:47,011 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 26 for LOIs [2023-04-02 22:25:47,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-02 22:25:47,017 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 22:25:49,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2706#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 22:25:49,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 22:25:49,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 22:25:49,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 51, 73] total 192 [2023-04-02 22:25:49,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930826236] [2023-04-02 22:25:49,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 22:25:49,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2023-04-02 22:25:49,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 22:25:49,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2023-04-02 22:25:49,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4914, Invalid=37315, Unknown=1, NotChecked=0, Total=42230 [2023-04-02 22:25:49,048 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 192 states, 186 states have (on average 1.075268817204301) internal successors, (200), 187 states have internal predecessors, (200), 11 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-02 22:26:41,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 22:26:41,590 INFO L93 Difference]: Finished difference Result 246 states and 265 transitions. [2023-04-02 22:26:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2023-04-02 22:26:41,590 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 186 states have (on average 1.075268817204301) internal successors, (200), 187 states have internal predecessors, (200), 11 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) Word has length 89 [2023-04-02 22:26:41,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 22:26:41,592 INFO L225 Difference]: With dead ends: 246 [2023-04-02 22:26:41,592 INFO L226 Difference]: Without dead ends: 188 [2023-04-02 22:26:41,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49578 ImplicationChecksByTransitivity, 71.7s TimeCoverageRelationStatistics Valid=19851, Invalid=115199, Unknown=6, NotChecked=0, Total=135056 [2023-04-02 22:26:41,603 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 364 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 4886 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 5128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 4886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-02 22:26:41,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 206 Invalid, 5128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 4886 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-02 22:26:41,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-04-02 22:26:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2023-04-02 22:26:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 168 states have (on average 1.0416666666666667) internal successors, (175), 169 states have internal predecessors, (175), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 22:26:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 194 transitions. [2023-04-02 22:26:41,660 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 194 transitions. Word has length 89 [2023-04-02 22:26:41,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 22:26:41,661 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 194 transitions. [2023-04-02 22:26:41,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 186 states have (on average 1.075268817204301) internal successors, (200), 187 states have internal predecessors, (200), 11 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2023-04-02 22:26:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 194 transitions. [2023-04-02 22:26:41,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-04-02 22:26:41,664 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 22:26:41,664 INFO L195 NwaCegarLoop]: trace histogram [140, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 22:26:41,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 22:26:41,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:26:41,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 22:26:41,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 22:26:41,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1279263243, now seen corresponding path program 3 times [2023-04-02 22:26:41,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 22:26:41,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655759515] [2023-04-02 22:26:41,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 22:26:41,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 22:26:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 22:27:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10845 backedges. 17 proven. 10372 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2023-04-02 22:27:21,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 22:27:21,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655759515] [2023-04-02 22:27:21,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655759515] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 22:27:21,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866508791] [2023-04-02 22:27:21,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 22:27:21,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 22:27:21,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 22:27:21,784 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 22:27:21,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 22:27:21,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 22:27:21,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 22:27:21,949 WARN L260 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 492 conjunts are in the unsatisfiable core [2023-04-02 22:27:21,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 22:27:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10845 backedges. 32 proven. 10785 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-02 22:27:54,063 INFO L327 TraceCheckSpWp]: Computing backward predicates...