/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:07:30,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:07:30,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:07:30,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:07:30,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:07:30,648 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:07:30,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:07:30,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:07:30,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:07:30,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:07:30,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:07:30,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:07:30,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:07:30,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:07:30,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:07:30,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:07:30,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:07:30,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:07:30,660 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:07:30,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:07:30,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:07:30,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:07:30,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:07:30,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:07:30,675 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 10:07:30,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:07:30,678 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:07:30,679 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:07:30,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:07:30,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:07:30,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:07:30,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:07:30,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:07:30,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:07:30,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:07:30,693 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:07:30,695 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 10:07:30,726 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:07:30,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:07:30,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:07:30,727 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:07:30,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:07:30,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:07:30,728 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:07:30,728 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:07:30,728 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:07:30,728 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:07:30,728 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:07:30,728 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:07:30,732 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:07:30,732 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:07:30,732 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:07:30,732 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:07:30,732 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:07:30,733 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:07:30,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:07:30,733 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:07:30,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:07:30,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:07:30,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:07:30,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:07:30,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:07:30,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:07:30,735 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:07:30,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:07:30,736 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:07:30,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:07:30,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:07:30,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:07:30,736 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:07:30,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:07:30,737 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:07:30,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:07:30,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:07:30,738 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:07:30,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:07:30,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:07:30,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:07:30,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:07:30,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:07:30,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:07:30,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:07:30,998 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:07:30,999 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:07:31,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label14.c [2023-04-01 10:07:32,165 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:07:32,570 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:07:32,571 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label14.c [2023-04-01 10:07:32,606 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c787f4825/50a14e70c51642c2ae956a2d27a6c614/FLAG6eafc4a36 [2023-04-01 10:07:32,621 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c787f4825/50a14e70c51642c2ae956a2d27a6c614 [2023-04-01 10:07:32,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:07:32,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:07:32,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:07:32,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:07:32,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:07:32,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:07:32" (1/1) ... [2023-04-01 10:07:32,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2984c1f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:32, skipping insertion in model container [2023-04-01 10:07:32,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:07:32" (1/1) ... [2023-04-01 10:07:32,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:07:32,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:07:32,986 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/eca-rers2012/Problem13_label14.c[5911,5924] [2023-04-01 10:07:33,786 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:07:33,798 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:07:33,826 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/eca-rers2012/Problem13_label14.c[5911,5924] [2023-04-01 10:07:34,281 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:07:34,306 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:07:34,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:34 WrapperNode [2023-04-01 10:07:34,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:07:34,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:07:34,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:07:34,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:07:34,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:34" (1/1) ... [2023-04-01 10:07:34,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:34" (1/1) ... [2023-04-01 10:07:34,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:34" (1/1) ... [2023-04-01 10:07:34,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:34" (1/1) ... [2023-04-01 10:07:34,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:34" (1/1) ... [2023-04-01 10:07:34,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:34" (1/1) ... [2023-04-01 10:07:34,605 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:34" (1/1) ... [2023-04-01 10:07:34,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:34" (1/1) ... [2023-04-01 10:07:34,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:07:34,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:07:34,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:07:34,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:07:34,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:34" (1/1) ... [2023-04-01 10:07:34,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:07:34,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:07:34,790 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 10:07:34,810 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 10:07:34,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:07:34,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:07:34,872 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:07:34,872 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:07:34,873 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:07:34,873 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:07:34,873 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:07:34,873 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:07:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:07:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:07:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:07:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:07:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:07:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:07:34,873 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:07:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:07:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:07:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:07:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:07:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:07:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:07:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:07:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:07:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:07:34,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:07:34,963 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:07:34,965 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:07:39,847 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:07:42,847 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:07:42,847 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:07:42,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:07:42 BoogieIcfgContainer [2023-04-01 10:07:42,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:07:42,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:07:42,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:07:42,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:07:42,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:07:32" (1/3) ... [2023-04-01 10:07:42,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729ca455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:07:42, skipping insertion in model container [2023-04-01 10:07:42,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:34" (2/3) ... [2023-04-01 10:07:42,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729ca455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:07:42, skipping insertion in model container [2023-04-01 10:07:42,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:07:42" (3/3) ... [2023-04-01 10:07:42,857 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label14.c [2023-04-01 10:07:42,874 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:07:42,874 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:07:42,938 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:07:42,946 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;@6b02482e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:07:42,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:07:42,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:07:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:07:42,961 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:07:42,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:07:42,962 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:07:42,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:07:42,966 INFO L85 PathProgramCache]: Analyzing trace with hash -330931148, now seen corresponding path program 1 times [2023-04-01 10:07:42,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:07:42,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6937969] [2023-04-01 10:07:42,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:07:42,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:07:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:07:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:07:43,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:07:43,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6937969] [2023-04-01 10:07:43,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6937969] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:07:43,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:07:43,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:07:43,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459080435] [2023-04-01 10:07:43,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:07:43,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:07:43,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:07:43,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:07:43,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:07:43,475 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:07:47,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:07:47,248 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:07:47,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:07:47,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:07:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:07:47,277 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:07:47,277 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:07:47,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 10:07:47,292 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 735 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:07:47,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 178 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 10:07:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:07:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-04-01 10:07:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1347 states have (on average 1.8574610244988865) internal successors, (2502), 1347 states have internal predecessors, (2502), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 10:07:47,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2525 transitions. [2023-04-01 10:07:47,424 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2525 transitions. Word has length 11 [2023-04-01 10:07:47,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:07:47,425 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2525 transitions. [2023-04-01 10:07:47,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:07:47,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2525 transitions. [2023-04-01 10:07:47,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:07:47,427 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:07:47,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:07:47,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:07:47,428 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:07:47,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:07:47,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2020125523, now seen corresponding path program 1 times [2023-04-01 10:07:47,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:07:47,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945860045] [2023-04-01 10:07:47,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:07:47,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:07:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:07:47,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:07:47,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:07:47,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945860045] [2023-04-01 10:07:47,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945860045] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:07:47,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:07:47,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:07:47,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162859671] [2023-04-01 10:07:47,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:07:47,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:07:47,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:07:47,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:07:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:07:47,637 INFO L87 Difference]: Start difference. First operand 1365 states and 2525 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:07:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:07:52,191 INFO L93 Difference]: Finished difference Result 4150 states and 7698 transitions. [2023-04-01 10:07:52,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:07:52,192 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-01 10:07:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:07:52,207 INFO L225 Difference]: With dead ends: 4150 [2023-04-01 10:07:52,208 INFO L226 Difference]: Without dead ends: 2790 [2023-04-01 10:07:52,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:07:52,220 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2455 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3743 mSolverCounterSat, 1165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1165 IncrementalHoareTripleChecker+Valid, 3743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:07:52,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2455 Valid, 109 Invalid, 4908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1165 Valid, 3743 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-04-01 10:07:52,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-04-01 10:07:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2749. [2023-04-01 10:07:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2702 states have (on average 1.5906735751295338) internal successors, (4298), 2708 states have internal predecessors, (4298), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (79), 25 states have call predecessors, (79), 14 states have call successors, (79) [2023-04-01 10:07:52,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 4392 transitions. [2023-04-01 10:07:52,325 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 4392 transitions. Word has length 21 [2023-04-01 10:07:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:07:52,325 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 4392 transitions. [2023-04-01 10:07:52,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:07:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 4392 transitions. [2023-04-01 10:07:52,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 10:07:52,326 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:07:52,326 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:07:52,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:07:52,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:07:52,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:07:52,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1383374281, now seen corresponding path program 1 times [2023-04-01 10:07:52,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:07:52,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52669445] [2023-04-01 10:07:52,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:07:52,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:07:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:07:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:07:52,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:07:52,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52669445] [2023-04-01 10:07:52,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52669445] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:07:52,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:07:52,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:07:52,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605468298] [2023-04-01 10:07:52,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:07:52,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:07:52,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:07:52,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:07:52,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:07:52,521 INFO L87 Difference]: Start difference. First operand 2749 states and 4392 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:07:57,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:07:57,723 INFO L93 Difference]: Finished difference Result 8429 states and 13621 transitions. [2023-04-01 10:07:57,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:07:57,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-04-01 10:07:57,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:07:57,759 INFO L225 Difference]: With dead ends: 8429 [2023-04-01 10:07:57,759 INFO L226 Difference]: Without dead ends: 5685 [2023-04-01 10:07:57,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:07:57,774 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2178 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2178 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 4872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:07:57,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2178 Valid, 134 Invalid, 5731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-04-01 10:07:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2023-04-01 10:07:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5634. [2023-04-01 10:07:57,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5490 states have (on average 1.3936247723132968) internal successors, (7651), 5522 states have internal predecessors, (7651), 27 states have call successors, (27), 27 states have call predecessors, (27), 116 states have return successors, (373), 84 states have call predecessors, (373), 26 states have call successors, (373) [2023-04-01 10:07:57,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 8051 transitions. [2023-04-01 10:07:57,965 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 8051 transitions. Word has length 23 [2023-04-01 10:07:57,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:07:57,966 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 8051 transitions. [2023-04-01 10:07:57,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:07:57,967 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 8051 transitions. [2023-04-01 10:07:57,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 10:07:57,968 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:07:57,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:07:57,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:07:57,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:07:57,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:07:57,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1705089906, now seen corresponding path program 1 times [2023-04-01 10:07:57,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:07:57,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550618538] [2023-04-01 10:07:57,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:07:57,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:07:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:07:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:07:58,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:07:58,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550618538] [2023-04-01 10:07:58,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550618538] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:07:58,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518925893] [2023-04-01 10:07:58,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:07:58,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:07:58,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:07:58,201 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 10:07:58,225 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 10:07:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:07:58,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:07:58,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:07:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:07:58,570 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:07:58,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518925893] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:07:58,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:07:58,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:07:58,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712795815] [2023-04-01 10:07:58,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:07:58,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:07:58,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:07:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:07:58,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:07:58,572 INFO L87 Difference]: Start difference. First operand 5634 states and 8051 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:08:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:02,844 INFO L93 Difference]: Finished difference Result 17148 states and 25308 transitions. [2023-04-01 10:08:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:08:02,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2023-04-01 10:08:02,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:02,897 INFO L225 Difference]: With dead ends: 17148 [2023-04-01 10:08:02,898 INFO L226 Difference]: Without dead ends: 11519 [2023-04-01 10:08:02,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:08:02,918 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 1062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1062 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:02,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1062 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 10:08:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2023-04-01 10:08:03,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 10645. [2023-04-01 10:08:03,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10645 states, 10328 states have (on average 1.2570681642137878) internal successors, (12983), 10410 states have internal predecessors, (12983), 49 states have call successors, (49), 49 states have call predecessors, (49), 267 states have return successors, (1161), 185 states have call predecessors, (1161), 48 states have call successors, (1161) [2023-04-01 10:08:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10645 states to 10645 states and 14193 transitions. [2023-04-01 10:08:03,216 INFO L78 Accepts]: Start accepts. Automaton has 10645 states and 14193 transitions. Word has length 41 [2023-04-01 10:08:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:03,216 INFO L495 AbstractCegarLoop]: Abstraction has 10645 states and 14193 transitions. [2023-04-01 10:08:03,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:08:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 10645 states and 14193 transitions. [2023-04-01 10:08:03,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 10:08:03,224 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:03,225 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:08:03,236 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 10:08:03,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:08:03,436 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:03,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:03,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1226417352, now seen corresponding path program 1 times [2023-04-01 10:08:03,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:03,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965873624] [2023-04-01 10:08:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:03,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:08:03,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:03,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965873624] [2023-04-01 10:08:03,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965873624] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:08:03,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:08:03,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 10:08:03,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700618184] [2023-04-01 10:08:03,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:03,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:08:03,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:03,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:08:03,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:08:03,865 INFO L87 Difference]: Start difference. First operand 10645 states and 14193 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:08:09,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:09,793 INFO L93 Difference]: Finished difference Result 29219 states and 41948 transitions. [2023-04-01 10:08:09,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:08:09,794 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2023-04-01 10:08:09,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:09,860 INFO L225 Difference]: With dead ends: 29219 [2023-04-01 10:08:09,861 INFO L226 Difference]: Without dead ends: 18964 [2023-04-01 10:08:09,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:08:09,882 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 6229 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 3278 mSolverCounterSat, 3133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6234 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 6411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3133 IncrementalHoareTripleChecker+Valid, 3278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:09,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6234 Valid, 74 Invalid, 6411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3133 Valid, 3278 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-04-01 10:08:09,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18964 states. [2023-04-01 10:08:10,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18964 to 16863. [2023-04-01 10:08:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16863 states, 16411 states have (on average 1.2274084455548109) internal successors, (20143), 16523 states have internal predecessors, (20143), 80 states have call successors, (80), 80 states have call predecessors, (80), 371 states have return successors, (2593), 259 states have call predecessors, (2593), 79 states have call successors, (2593) [2023-04-01 10:08:10,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16863 states to 16863 states and 22816 transitions. [2023-04-01 10:08:10,269 INFO L78 Accepts]: Start accepts. Automaton has 16863 states and 22816 transitions. Word has length 70 [2023-04-01 10:08:10,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:10,271 INFO L495 AbstractCegarLoop]: Abstraction has 16863 states and 22816 transitions. [2023-04-01 10:08:10,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:08:10,272 INFO L276 IsEmpty]: Start isEmpty. Operand 16863 states and 22816 transitions. [2023-04-01 10:08:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-04-01 10:08:10,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:10,286 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:08:10,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:08:10,287 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:10,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash 544882996, now seen corresponding path program 1 times [2023-04-01 10:08:10,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:10,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696613708] [2023-04-01 10:08:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:10,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 10:08:10,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:10,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696613708] [2023-04-01 10:08:10,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696613708] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:08:10,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869238819] [2023-04-01 10:08:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:10,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:08:10,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:08:10,617 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 10:08:10,627 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 10:08:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:10,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:08:10,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:08:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 10:08:11,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:08:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 10:08:11,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869238819] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:08:11,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1255037325] [2023-04-01 10:08:11,604 INFO L159 IcfgInterpreter]: Started Sifa with 99 locations of interest [2023-04-01 10:08:11,604 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:08:11,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:08:11,611 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:08:11,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:08:11,881 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 81 for LOIs [2023-04-01 10:08:12,304 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 35 [2023-04-01 10:08:12,446 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7140 conjuctions. This might take some time... [2023-04-01 10:08:12,575 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 65 conjuctions. [2023-04-01 10:08:19,654 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 26