/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/Problem17_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:27:32,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:27:32,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:27:32,641 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:27:32,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:27:32,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:27:32,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:27:32,645 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:27:32,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:27:32,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:27:32,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:27:32,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:27:32,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:27:32,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:27:32,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:27:32,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:27:32,652 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:27:32,653 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:27:32,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:27:32,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:27:32,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:27:32,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:27:32,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:27:32,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:27:32,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:27:32,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:27:32,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:27:32,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:27:32,664 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:27:32,665 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:27:32,665 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:27:32,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:27:32,667 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:27:32,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:27:32,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:27:32,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:27:32,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:27:32,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:27:32,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:27:32,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:27:32,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:27:32,677 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 10:27:32,706 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:27:32,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:27:32,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:27:32,707 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:27:32,707 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:27:32,708 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:27:32,708 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:27:32,708 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:27:32,708 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:27:32,708 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:27:32,708 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:27:32,708 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:27:32,712 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:27:32,712 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:27:32,712 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:27:32,712 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:27:32,712 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:27:32,712 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:27:32,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:27:32,713 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:27:32,713 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:27:32,713 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:27:32,713 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:27:32,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:27:32,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:27:32,714 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:27:32,714 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:27:32,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:27:32,715 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:27:32,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:27:32,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:27:32,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:27:32,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:27:32,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:27:32,716 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:27:32,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:27:32,717 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:27:32,717 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:27:32,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:27:32,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:27:32,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:27:32,717 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:27:32,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:27:32,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:27:32,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:27:32,976 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:27:32,976 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:27:32,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label47.c [2023-04-01 10:27:34,103 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:27:34,484 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:27:34,485 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label47.c [2023-04-01 10:27:34,508 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ebd5dfd/0f894aaf5ccb40fea38a32c3132d6de9/FLAG7fb18b195 [2023-04-01 10:27:34,523 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ebd5dfd/0f894aaf5ccb40fea38a32c3132d6de9 [2023-04-01 10:27:34,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:27:34,528 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:27:34,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:27:34,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:27:34,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:27:34,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:27:34" (1/1) ... [2023-04-01 10:27:34,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7889c9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:34, skipping insertion in model container [2023-04-01 10:27:34,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:27:34" (1/1) ... [2023-04-01 10:27:34,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:27:34,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:27:34,874 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/Problem17_label47.c[6608,6621] [2023-04-01 10:27:35,305 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:27:35,316 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:27:35,341 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/Problem17_label47.c[6608,6621] [2023-04-01 10:27:35,538 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:27:35,553 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:27:35,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:35 WrapperNode [2023-04-01 10:27:35,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:27:35,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:27:35,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:27:35,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:27:35,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:35" (1/1) ... [2023-04-01 10:27:35,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:35" (1/1) ... [2023-04-01 10:27:35,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:35" (1/1) ... [2023-04-01 10:27:35,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:35" (1/1) ... [2023-04-01 10:27:35,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:35" (1/1) ... [2023-04-01 10:27:35,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:35" (1/1) ... [2023-04-01 10:27:35,695 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:35" (1/1) ... [2023-04-01 10:27:35,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:35" (1/1) ... [2023-04-01 10:27:35,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:27:35,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:27:35,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:27:35,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:27:35,733 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:35" (1/1) ... [2023-04-01 10:27:35,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:27:35,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:27:35,766 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 10:27:35,784 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 10:27:35,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:27:35,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:27:35,803 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:27:35,803 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:27:35,803 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:27:35,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:27:35,803 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:27:35,803 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:27:35,803 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:27:35,803 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:27:35,803 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:27:35,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:27:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:27:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:27:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:27:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:27:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:27:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:27:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:27:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:27:35,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:27:35,885 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:27:35,887 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:27:38,951 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:27:48,007 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:27:48,007 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:27:48,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:27:48 BoogieIcfgContainer [2023-04-01 10:27:48,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:27:48,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:27:48,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:27:48,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:27:48,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:27:34" (1/3) ... [2023-04-01 10:27:48,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22be1010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:27:48, skipping insertion in model container [2023-04-01 10:27:48,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:27:35" (2/3) ... [2023-04-01 10:27:48,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22be1010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:27:48, skipping insertion in model container [2023-04-01 10:27:48,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:27:48" (3/3) ... [2023-04-01 10:27:48,017 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label47.c [2023-04-01 10:27:48,037 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:27:48,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:27:48,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:27:48,084 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;@6baccf09, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:27:48,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:27:48,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:27:48,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:27:48,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:27:48,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:27:48,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:27:48,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:27:48,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2084309015, now seen corresponding path program 1 times [2023-04-01 10:27:48,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:27:48,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531120611] [2023-04-01 10:27:48,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:27:48,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:27:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:27:48,403 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 10:27:48,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:27:48,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531120611] [2023-04-01 10:27:48,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531120611] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:27:48,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:27:48,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:27:48,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877200622] [2023-04-01 10:27:48,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:27:48,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:27:48,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:27:48,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:27:48,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:27:48,443 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 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 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 10:27:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:27:50,066 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:27:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:27:50,071 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 10:27:50,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:27:50,083 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:27:50,083 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:27:50,088 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 10:27:50,091 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 237 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:27:50,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 169 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 10:27:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:27:50,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 10:27:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.6296296296296295) internal successors, (748), 459 states have internal predecessors, (748), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 10:27:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 759 transitions. [2023-04-01 10:27:50,146 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 759 transitions. Word has length 11 [2023-04-01 10:27:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:27:50,146 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 759 transitions. [2023-04-01 10:27:50,147 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 10:27:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 759 transitions. [2023-04-01 10:27:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 10:27:50,148 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:27:50,148 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 10:27:50,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:27:50,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:27:50,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:27:50,149 INFO L85 PathProgramCache]: Analyzing trace with hash -262818171, now seen corresponding path program 1 times [2023-04-01 10:27:50,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:27:50,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746729888] [2023-04-01 10:27:50,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:27:50,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:27:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:27:50,349 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 10:27:50,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:27:50,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746729888] [2023-04-01 10:27:50,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746729888] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:27:50,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:27:50,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:27:50,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598554714] [2023-04-01 10:27:50,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:27:50,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:27:50,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:27:50,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:27:50,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:27:50,353 INFO L87 Difference]: Start difference. First operand 469 states and 759 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 10:27:52,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:27:52,229 INFO L93 Difference]: Finished difference Result 1416 states and 2311 transitions. [2023-04-01 10:27:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:27:52,230 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 10:27:52,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:27:52,236 INFO L225 Difference]: With dead ends: 1416 [2023-04-01 10:27:52,237 INFO L226 Difference]: Without dead ends: 952 [2023-04-01 10:27:52,238 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 10:27:52,240 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 736 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:27:52,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 46 Invalid, 1746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 1281 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 10:27:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2023-04-01 10:27:52,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 706. [2023-04-01 10:27:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 689 states have (on average 1.4238026124818577) internal successors, (981), 692 states have internal predecessors, (981), 7 states have call successors, (7), 7 states have call predecessors, (7), 9 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2023-04-01 10:27:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1007 transitions. [2023-04-01 10:27:52,283 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1007 transitions. Word has length 23 [2023-04-01 10:27:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:27:52,284 INFO L495 AbstractCegarLoop]: Abstraction has 706 states and 1007 transitions. [2023-04-01 10:27:52,284 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 10:27:52,284 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1007 transitions. [2023-04-01 10:27:52,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 10:27:52,285 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:27:52,285 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] [2023-04-01 10:27:52,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:27:52,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:27:52,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:27:52,286 INFO L85 PathProgramCache]: Analyzing trace with hash 546211255, now seen corresponding path program 1 times [2023-04-01 10:27:52,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:27:52,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557756431] [2023-04-01 10:27:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:27:52,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:27:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:27:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:27:52,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:27:52,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557756431] [2023-04-01 10:27:52,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557756431] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:27:52,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695342725] [2023-04-01 10:27:52,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:27:52,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:27:52,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:27:52,554 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 10:27:52,555 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 10:27:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:27:52,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 10:27:52,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:27:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:27:53,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:27:53,341 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 10:27:53,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695342725] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 10:27:53,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 10:27:53,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-04-01 10:27:53,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178788335] [2023-04-01 10:27:53,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:27:53,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 10:27:53,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:27:53,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 10:27:53,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-04-01 10:27:53,347 INFO L87 Difference]: Start difference. First operand 706 states and 1007 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 10:27:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:27:55,913 INFO L93 Difference]: Finished difference Result 2100 states and 3034 transitions. [2023-04-01 10:27:55,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:27:55,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 26 [2023-04-01 10:27:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:27:55,920 INFO L225 Difference]: With dead ends: 2100 [2023-04-01 10:27:55,920 INFO L226 Difference]: Without dead ends: 1399 [2023-04-01 10:27:55,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-04-01 10:27:55,922 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 732 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:27:55,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 29 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 10:27:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2023-04-01 10:27:55,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1168. [2023-04-01 10:27:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1145 states have (on average 1.4637554585152839) internal successors, (1676), 1148 states have internal predecessors, (1676), 10 states have call successors, (10), 10 states have call predecessors, (10), 12 states have return successors, (40), 9 states have call predecessors, (40), 9 states have call successors, (40) [2023-04-01 10:27:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1726 transitions. [2023-04-01 10:27:55,968 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1726 transitions. Word has length 26 [2023-04-01 10:27:55,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:27:55,968 INFO L495 AbstractCegarLoop]: Abstraction has 1168 states and 1726 transitions. [2023-04-01 10:27:55,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 10:27:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1726 transitions. [2023-04-01 10:27:55,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 10:27:55,970 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:27:55,970 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] [2023-04-01 10:27:55,979 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 10:27:56,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:27:56,176 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:27:56,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:27:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash 939461861, now seen corresponding path program 1 times [2023-04-01 10:27:56,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:27:56,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071306631] [2023-04-01 10:27:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:27:56,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:27:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:27:56,267 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 10:27:56,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:27:56,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071306631] [2023-04-01 10:27:56,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071306631] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:27:56,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:27:56,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:27:56,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969212060] [2023-04-01 10:27:56,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:27:56,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:27:56,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:27:56,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:27:56,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:27:56,270 INFO L87 Difference]: Start difference. First operand 1168 states and 1726 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:27:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:27:57,827 INFO L93 Difference]: Finished difference Result 3021 states and 4655 transitions. [2023-04-01 10:27:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:27:57,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2023-04-01 10:27:57,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:27:57,837 INFO L225 Difference]: With dead ends: 3021 [2023-04-01 10:27:57,837 INFO L226 Difference]: Without dead ends: 1858 [2023-04-01 10:27:57,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 10:27:57,845 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 269 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:27:57,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 347 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 10:27:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2023-04-01 10:27:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1835. [2023-04-01 10:27:57,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 1805 states have (on average 1.4166204986149584) internal successors, (2557), 1809 states have internal predecessors, (2557), 13 states have call successors, (13), 13 states have call predecessors, (13), 16 states have return successors, (71), 12 states have call predecessors, (71), 12 states have call successors, (71) [2023-04-01 10:27:57,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2641 transitions. [2023-04-01 10:27:57,902 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2641 transitions. Word has length 39 [2023-04-01 10:27:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:27:57,903 INFO L495 AbstractCegarLoop]: Abstraction has 1835 states and 2641 transitions. [2023-04-01 10:27:57,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:27:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2641 transitions. [2023-04-01 10:27:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 10:27:57,911 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:27:57,912 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-04-01 10:27:57,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:27:57,912 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:27:57,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:27:57,914 INFO L85 PathProgramCache]: Analyzing trace with hash -635397639, now seen corresponding path program 1 times [2023-04-01 10:27:57,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:27:57,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312087983] [2023-04-01 10:27:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:27:57,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:27:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:27:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 10:27:58,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:27:58,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312087983] [2023-04-01 10:27:58,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312087983] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:27:58,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:27:58,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:27:58,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236617954] [2023-04-01 10:27:58,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:27:58,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:27:58,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:27:58,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:27:58,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:27:58,133 INFO L87 Difference]: Start difference. First operand 1835 states and 2641 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:27:59,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:27:59,740 INFO L93 Difference]: Finished difference Result 4839 states and 7181 transitions. [2023-04-01 10:27:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:27:59,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2023-04-01 10:27:59,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:27:59,764 INFO L225 Difference]: With dead ends: 4839 [2023-04-01 10:27:59,764 INFO L226 Difference]: Without dead ends: 3009 [2023-04-01 10:27:59,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 10:27:59,771 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 235 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:27:59,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 220 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 10:27:59,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2023-04-01 10:27:59,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 2739. [2023-04-01 10:27:59,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2739 states, 2698 states have (on average 1.4558932542624166) internal successors, (3928), 2705 states have internal predecessors, (3928), 17 states have call successors, (17), 17 states have call predecessors, (17), 23 states have return successors, (153), 16 states have call predecessors, (153), 16 states have call successors, (153) [2023-04-01 10:27:59,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4098 transitions. [2023-04-01 10:27:59,851 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4098 transitions. Word has length 55 [2023-04-01 10:27:59,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:27:59,853 INFO L495 AbstractCegarLoop]: Abstraction has 2739 states and 4098 transitions. [2023-04-01 10:27:59,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:27:59,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4098 transitions. [2023-04-01 10:27:59,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-04-01 10:27:59,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:27:59,857 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:27:59,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:27:59,858 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:27:59,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:27:59,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1417649836, now seen corresponding path program 1 times [2023-04-01 10:27:59,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:27:59,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645397693] [2023-04-01 10:27:59,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:27:59,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:27:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:28:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:28:01,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:28:01,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645397693] [2023-04-01 10:28:01,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645397693] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:28:01,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770798747] [2023-04-01 10:28:01,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:28:01,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:28:01,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:28:01,722 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 10:28:01,766 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 10:28:01,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:28:01,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 10:28:01,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:28:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 10:28:02,235 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:28:02,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770798747] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:28:02,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:28:02,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-04-01 10:28:02,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609277100] [2023-04-01 10:28:02,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:28:02,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 10:28:02,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:28:02,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 10:28:02,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-04-01 10:28:02,237 INFO L87 Difference]: Start difference. First operand 2739 states and 4098 transitions. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 6 states have internal predecessors, (116), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:28:07,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 10:28:09,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:28:09,290 INFO L93 Difference]: Finished difference Result 7136 states and 10573 transitions. [2023-04-01 10:28:09,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 10:28:09,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 6 states have internal predecessors, (116), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 145 [2023-04-01 10:28:09,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:28:09,310 INFO L225 Difference]: With dead ends: 7136 [2023-04-01 10:28:09,311 INFO L226 Difference]: Without dead ends: 4402 [2023-04-01 10:28:09,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-04-01 10:28:09,320 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 844 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 3236 mSolverCounterSat, 507 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 3744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 3236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:28:09,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 83 Invalid, 3744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 3236 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2023-04-01 10:28:09,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4402 states. [2023-04-01 10:28:09,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4402 to 3624. [2023-04-01 10:28:09,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3557 states have (on average 1.3666010683159966) internal successors, (4861), 3581 states have internal predecessors, (4861), 22 states have call successors, (22), 22 states have call predecessors, (22), 44 states have return successors, (250), 20 states have call predecessors, (250), 21 states have call successors, (250) [2023-04-01 10:28:09,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 5133 transitions. [2023-04-01 10:28:09,433 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 5133 transitions. Word has length 145 [2023-04-01 10:28:09,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:28:09,433 INFO L495 AbstractCegarLoop]: Abstraction has 3624 states and 5133 transitions. [2023-04-01 10:28:09,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 6 states have internal predecessors, (116), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:28:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 5133 transitions. [2023-04-01 10:28:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-04-01 10:28:09,441 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:28:09,442 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2023-04-01 10:28:09,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 10:28:09,647 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,SelfDestructingSolverStorable5 [2023-04-01 10:28:09,648 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:28:09,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:28:09,648 INFO L85 PathProgramCache]: Analyzing trace with hash 783157252, now seen corresponding path program 1 times [2023-04-01 10:28:09,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:28:09,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621079417] [2023-04-01 10:28:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:28:09,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:28:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:28:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 45 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-04-01 10:28:10,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:28:10,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621079417] [2023-04-01 10:28:10,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621079417] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:28:10,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836826303] [2023-04-01 10:28:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:28:10,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:28:10,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:28:10,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:28:10,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 10:28:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:28:10,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 10:28:10,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:28:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 81 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:28:10,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:28:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 23 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:28:10,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836826303] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:28:10,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [553067935] [2023-04-01 10:28:10,863 INFO L159 IcfgInterpreter]: Started Sifa with 113 locations of interest [2023-04-01 10:28:10,863 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:28:10,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:28:10,870 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:28:10,870 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:28:11,207 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 82 for LOIs [2023-04-01 10:28:11,640 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 38 [2023-04-01 10:28:12,773 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 19662 conjuctions. This might take some time... [2023-04-01 10:28:13,601 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 606 conjuctions.