/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:58:54,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:58:54,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:58:54,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:58:54,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:58:54,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:58:54,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:58:54,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:58:54,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:58:54,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:58:54,822 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:58:54,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:58:54,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:58:54,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:58:54,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:58:54,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:58:54,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:58:54,826 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:58:54,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:58:54,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:58:54,829 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:58:54,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:58:54,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:58:54,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:58:54,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:58:54,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:58:54,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:58:54,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:58:54,846 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:58:54,846 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:58:54,847 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:58:54,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:58:54,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:58:54,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:58:54,849 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:58:54,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:58:54,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:58:54,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:58:54,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:58:54,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:58:54,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:58:54,853 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 [2023-03-31 21:58:54,887 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:58:54,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:58:54,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:58:54,888 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:58:54,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:58:54,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:58:54,889 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:58:54,889 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:58:54,890 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:58:54,890 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:58:54,890 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:58:54,891 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:58:54,891 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:58:54,891 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:58:54,891 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:58:54,891 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:58:54,891 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:58:54,891 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:58:54,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:58:54,892 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:58:54,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:58:54,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:58:54,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:58:54,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:58:54,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:58:54,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:58:54,893 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:58:54,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:58:54,893 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:58:54,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:58:54,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:58:54,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:58:54,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:58:54,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:58:54,894 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:58:54,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:58:54,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:58:54,894 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:58:54,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:58:54,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:58:54,895 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:58:54,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:58:55,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:58:55,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:58:55,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:58:55,150 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:58:55,151 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:58:55,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label22.c [2023-03-31 21:58:56,362 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:58:56,790 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:58:56,790 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label22.c [2023-03-31 21:58:56,823 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b563a59c9/2ce4300d765145c1882567075ca69366/FLAG21004ec04 [2023-03-31 21:58:56,837 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b563a59c9/2ce4300d765145c1882567075ca69366 [2023-03-31 21:58:56,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:58:56,843 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:58:56,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:58:56,844 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:58:56,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:58:56,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:58:56" (1/1) ... [2023-03-31 21:58:56,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798d667a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:56, skipping insertion in model container [2023-03-31 21:58:56,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:58:56" (1/1) ... [2023-03-31 21:58:56,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:58:56,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:58:57,175 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/Problem12_label22.c[7880,7893] [2023-03-31 21:58:57,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:58:57,817 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:58:57,848 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/Problem12_label22.c[7880,7893] [2023-03-31 21:58:58,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:58:58,197 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:58:58,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:58 WrapperNode [2023-03-31 21:58:58,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:58:58,199 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:58:58,199 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:58:58,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:58:58,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:58" (1/1) ... [2023-03-31 21:58:58,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:58" (1/1) ... [2023-03-31 21:58:58,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:58" (1/1) ... [2023-03-31 21:58:58,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:58" (1/1) ... [2023-03-31 21:58:58,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:58" (1/1) ... [2023-03-31 21:58:58,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:58" (1/1) ... [2023-03-31 21:58:58,403 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:58" (1/1) ... [2023-03-31 21:58:58,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:58" (1/1) ... [2023-03-31 21:58:58,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:58:58,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:58:58,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:58:58,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:58:58,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:58" (1/1) ... [2023-03-31 21:58:58,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:58:58,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:58:58,478 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) [2023-03-31 21:58:58,492 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 [2023-03-31 21:58:58,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:58:58,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:58:58,513 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:58:58,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:58:58,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 21:58:58,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 21:58:58,513 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 21:58:58,513 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:58:58,513 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:58:58,513 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 21:58:58,513 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 21:58:58,561 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 21:58:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:58:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:58:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:58:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:58:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:58:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:58:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:58:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:58:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:58:58,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:58:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:58:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:58:58,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:58:58,648 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:58:58,653 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:59:02,077 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:59:02,634 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:59:02,634 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:59:02,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:59:02 BoogieIcfgContainer [2023-03-31 21:59:02,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:59:02,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:59:02,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:59:02,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:59:02,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:58:56" (1/3) ... [2023-03-31 21:59:02,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3cbaf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:59:02, skipping insertion in model container [2023-03-31 21:59:02,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:58:58" (2/3) ... [2023-03-31 21:59:02,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b3cbaf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:59:02, skipping insertion in model container [2023-03-31 21:59:02,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:59:02" (3/3) ... [2023-03-31 21:59:02,645 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label22.c [2023-03-31 21:59:02,661 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:59:02,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:59:02,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:59:02,720 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;@75bd6d29, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:59:02,721 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:59:02,727 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) [2023-03-31 21:59:02,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 21:59:02,733 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:02,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:59:02,734 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:02,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:02,738 INFO L85 PathProgramCache]: Analyzing trace with hash 636351300, now seen corresponding path program 1 times [2023-03-31 21:59:02,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:02,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240906366] [2023-03-31 21:59:02,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:02,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:59:03,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:03,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240906366] [2023-03-31 21:59:03,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240906366] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:59:03,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:59:03,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:59:03,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308017166] [2023-03-31 21:59:03,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:59:03,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:59:03,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:59:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:59:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:59:03,111 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) [2023-03-31 21:59:06,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:59:06,364 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 21:59:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:59:06,369 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 [2023-03-31 21:59:06,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:59:06,397 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 21:59:06,398 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 21:59:06,407 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 [2023-03-31 21:59:06,412 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 738 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2090 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 2090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:59:06,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 112 Invalid, 3055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 2090 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 21:59:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 21:59:06,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-03-31 21:59:06,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.9348148148148148) internal successors, (2612), 1350 states have internal predecessors, (2612), 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) [2023-03-31 21:59:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2635 transitions. [2023-03-31 21:59:06,535 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2635 transitions. Word has length 11 [2023-03-31 21:59:06,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:59:06,536 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2635 transitions. [2023-03-31 21:59:06,536 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) [2023-03-31 21:59:06,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2635 transitions. [2023-03-31 21:59:06,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 21:59:06,538 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:06,538 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] [2023-03-31 21:59:06,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:59:06,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:06,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1446385695, now seen corresponding path program 1 times [2023-03-31 21:59:06,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:06,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395234309] [2023-03-31 21:59:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:06,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:06,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:59:06,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:06,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395234309] [2023-03-31 21:59:06,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395234309] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:59:06,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:59:06,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:59:06,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453585116] [2023-03-31 21:59:06,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:59:06,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:59:06,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:59:06,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:59:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:59:06,780 INFO L87 Difference]: Start difference. First operand 1368 states and 2635 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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) [2023-03-31 21:59:11,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:59:11,011 INFO L93 Difference]: Finished difference Result 4148 states and 8004 transitions. [2023-03-31 21:59:11,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:59:11,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 29 [2023-03-31 21:59:11,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:59:11,027 INFO L225 Difference]: With dead ends: 4148 [2023-03-31 21:59:11,028 INFO L226 Difference]: Without dead ends: 2785 [2023-03-31 21:59:11,037 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 [2023-03-31 21:59:11,039 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2807 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3802 mSolverCounterSat, 886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2807 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 4688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 3802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:59:11,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2807 Valid, 101 Invalid, 4688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 3802 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-03-31 21:59:11,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-03-31 21:59:11,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2755. [2023-03-31 21:59:11,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2713 states have (on average 1.6973829708809436) internal successors, (4605), 2717 states have internal predecessors, (4605), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-03-31 21:59:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4682 transitions. [2023-03-31 21:59:11,184 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4682 transitions. Word has length 29 [2023-03-31 21:59:11,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:59:11,185 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4682 transitions. [2023-03-31 21:59:11,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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) [2023-03-31 21:59:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4682 transitions. [2023-03-31 21:59:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 21:59:11,187 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:11,187 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:59:11,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:59:11,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:11,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:11,188 INFO L85 PathProgramCache]: Analyzing trace with hash 728764166, now seen corresponding path program 1 times [2023-03-31 21:59:11,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:11,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252802620] [2023-03-31 21:59:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:11,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:59:11,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:11,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252802620] [2023-03-31 21:59:11,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252802620] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:59:11,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115458194] [2023-03-31 21:59:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:11,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:59:11,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:59:11,453 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) [2023-03-31 21:59:11,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:59:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:11,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:59:11,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:59:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:59:11,660 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:59:11,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115458194] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:59:11,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:59:11,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:59:11,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447808273] [2023-03-31 21:59:11,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:59:11,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:59:11,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:59:11,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:59:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:59:11,662 INFO L87 Difference]: Start difference. First operand 2755 states and 4682 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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) [2023-03-31 21:59:16,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:59:16,143 INFO L93 Difference]: Finished difference Result 8445 states and 14563 transitions. [2023-03-31 21:59:16,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:59:16,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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 43 [2023-03-31 21:59:16,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:59:16,176 INFO L225 Difference]: With dead ends: 8445 [2023-03-31 21:59:16,176 INFO L226 Difference]: Without dead ends: 5695 [2023-03-31 21:59:16,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-03-31 21:59:16,184 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2314 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4335 mSolverCounterSat, 975 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 975 IncrementalHoareTripleChecker+Valid, 4335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-03-31 21:59:16,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2314 Valid, 95 Invalid, 5310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [975 Valid, 4335 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-03-31 21:59:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5695 states. [2023-03-31 21:59:16,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5695 to 5583. [2023-03-31 21:59:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5583 states, 5460 states have (on average 1.491941391941392) internal successors, (8146), 5483 states have internal predecessors, (8146), 27 states have call successors, (27), 27 states have call predecessors, (27), 95 states have return successors, (350), 72 states have call predecessors, (350), 26 states have call successors, (350) [2023-03-31 21:59:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5583 states to 5583 states and 8523 transitions. [2023-03-31 21:59:16,362 INFO L78 Accepts]: Start accepts. Automaton has 5583 states and 8523 transitions. Word has length 43 [2023-03-31 21:59:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:59:16,363 INFO L495 AbstractCegarLoop]: Abstraction has 5583 states and 8523 transitions. [2023-03-31 21:59:16,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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) [2023-03-31 21:59:16,363 INFO L276 IsEmpty]: Start isEmpty. Operand 5583 states and 8523 transitions. [2023-03-31 21:59:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 21:59:16,367 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:16,367 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] [2023-03-31 21:59:16,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 21:59:16,573 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 [2023-03-31 21:59:16,573 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:16,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:16,574 INFO L85 PathProgramCache]: Analyzing trace with hash -538186050, now seen corresponding path program 1 times [2023-03-31 21:59:16,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:16,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466465068] [2023-03-31 21:59:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:16,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:16,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:59:16,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:16,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466465068] [2023-03-31 21:59:16,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466465068] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:59:16,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:59:16,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:59:16,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59069328] [2023-03-31 21:59:16,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:59:16,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:59:16,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:59:16,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:59:16,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:59:16,735 INFO L87 Difference]: Start difference. First operand 5583 states and 8523 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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) [2023-03-31 21:59:21,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:59:21,151 INFO L93 Difference]: Finished difference Result 17084 states and 27298 transitions. [2023-03-31 21:59:21,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:59:21,153 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 42 [2023-03-31 21:59:21,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:59:21,207 INFO L225 Difference]: With dead ends: 17084 [2023-03-31 21:59:21,207 INFO L226 Difference]: Without dead ends: 11506 [2023-03-31 21:59:21,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:59:21,231 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2079 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4739 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2079 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 5448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 4739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-03-31 21:59:21,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2079 Valid, 102 Invalid, 5448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 4739 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-03-31 21:59:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11506 states. [2023-03-31 21:59:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11506 to 11063. [2023-03-31 21:59:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11063 states, 10731 states have (on average 1.3301649426894044) internal successors, (14274), 10821 states have internal predecessors, (14274), 51 states have call successors, (51), 51 states have call predecessors, (51), 280 states have return successors, (1406), 190 states have call predecessors, (1406), 50 states have call successors, (1406) [2023-03-31 21:59:21,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11063 states to 11063 states and 15731 transitions. [2023-03-31 21:59:21,582 INFO L78 Accepts]: Start accepts. Automaton has 11063 states and 15731 transitions. Word has length 42 [2023-03-31 21:59:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:59:21,583 INFO L495 AbstractCegarLoop]: Abstraction has 11063 states and 15731 transitions. [2023-03-31 21:59:21,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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) [2023-03-31 21:59:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 11063 states and 15731 transitions. [2023-03-31 21:59:21,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-03-31 21:59:21,589 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:21,589 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 21:59:21,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:59:21,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:21,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:21,589 INFO L85 PathProgramCache]: Analyzing trace with hash -139717709, now seen corresponding path program 1 times [2023-03-31 21:59:21,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:21,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814893206] [2023-03-31 21:59:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:21,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:59:21,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:21,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814893206] [2023-03-31 21:59:21,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814893206] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:59:21,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769476999] [2023-03-31 21:59:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:21,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:59:21,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:59:21,839 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) [2023-03-31 21:59:21,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:59:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:21,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:59:21,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:59:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:59:22,069 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:59:22,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769476999] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:59:22,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:59:22,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:59:22,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463713475] [2023-03-31 21:59:22,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:59:22,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:59:22,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:59:22,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:59:22,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:59:22,071 INFO L87 Difference]: Start difference. First operand 11063 states and 15731 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-03-31 21:59:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:59:25,797 INFO L93 Difference]: Finished difference Result 28698 states and 43618 transitions. [2023-03-31 21:59:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:59:25,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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 80 [2023-03-31 21:59:25,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:59:25,871 INFO L225 Difference]: With dead ends: 28698 [2023-03-31 21:59:25,872 INFO L226 Difference]: Without dead ends: 17640 [2023-03-31 21:59:25,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-03-31 21:59:25,966 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2068 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4063 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 5009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 4063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-03-31 21:59:25,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2068 Valid, 86 Invalid, 5009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 4063 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-03-31 21:59:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17640 states. [2023-03-31 21:59:26,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17640 to 16650. [2023-03-31 21:59:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16650 states, 16138 states have (on average 1.3326930226793903) internal successors, (21507), 16283 states have internal predecessors, (21507), 76 states have call successors, (76), 76 states have call predecessors, (76), 435 states have return successors, (3154), 290 states have call predecessors, (3154), 75 states have call successors, (3154) [2023-03-31 21:59:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16650 states to 16650 states and 24737 transitions. [2023-03-31 21:59:26,394 INFO L78 Accepts]: Start accepts. Automaton has 16650 states and 24737 transitions. Word has length 80 [2023-03-31 21:59:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:59:26,396 INFO L495 AbstractCegarLoop]: Abstraction has 16650 states and 24737 transitions. [2023-03-31 21:59:26,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 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) [2023-03-31 21:59:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 16650 states and 24737 transitions. [2023-03-31 21:59:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-03-31 21:59:26,398 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:26,399 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 21:59:26,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 21:59:26,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:59:26,605 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:26,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:26,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1611260930, now seen corresponding path program 1 times [2023-03-31 21:59:26,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:26,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594993696] [2023-03-31 21:59:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:26,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:26,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:59:26,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:26,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594993696] [2023-03-31 21:59:26,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594993696] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:59:26,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848823584] [2023-03-31 21:59:26,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:26,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:59:26,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:59:26,809 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) [2023-03-31 21:59:26,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 21:59:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:26,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:59:26,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:59:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:59:27,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:59:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:59:27,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848823584] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:59:27,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1265378617] [2023-03-31 21:59:27,234 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-03-31 21:59:27,235 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:59:27,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:59:27,241 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:59:27,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:59:27,388 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-03-31 21:59:27,705 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 58 [2023-03-31 21:59:28,439 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 46 for LOIs [2023-03-31 21:59:28,654 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 58