/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/Problem19_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:31:43,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:31:43,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:31:43,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:31:43,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:31:43,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:31:43,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:31:43,851 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:31:43,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:31:43,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:31:43,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:31:43,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:31:43,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:31:43,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:31:43,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:31:43,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:31:43,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:31:43,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:31:43,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:31:43,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:31:43,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:31:43,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:31:43,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:31:43,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:31:43,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:31:43,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:31:43,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:31:43,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:31:43,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:31:43,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:31:43,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:31:43,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:31:43,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:31:43,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:31:43,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:31:43,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:31:43,883 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 22:31:43,905 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:31:43,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:31:43,906 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:31:43,906 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:31:43,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:31:43,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:31:43,907 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:31:43,907 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:31:43,907 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:31:43,907 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:31:43,907 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:31:43,908 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:31:43,908 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:31:43,908 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:31:43,908 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:31:43,908 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:31:43,908 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:31:43,908 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:31:43,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:31:43,909 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:31:43,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:31:43,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:31:43,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:31:43,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:31:43,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:31:43,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:31:43,910 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:31:43,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:31:43,910 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:31:43,910 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:31:43,910 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:31:43,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:31:43,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:31:43,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:31:43,911 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:31:43,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:31:43,911 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:31:43,911 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:31:43,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:31:43,911 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:31:43,911 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:31:43,911 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:31:44,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:31:44,117 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:31:44,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:31:44,120 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:31:44,120 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:31:44,121 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label33.c [2023-03-31 22:31:45,049 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:31:45,515 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:31:45,516 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label33.c [2023-03-31 22:31:45,550 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dbc4cb62/c01bb3066ce14971994c3a4a93eaa65a/FLAGabe32ca98 [2023-03-31 22:31:45,676 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dbc4cb62/c01bb3066ce14971994c3a4a93eaa65a [2023-03-31 22:31:45,678 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:31:45,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:31:45,682 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:31:45,682 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:31:45,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:31:45,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:31:45" (1/1) ... [2023-03-31 22:31:45,686 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ee63c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:45, skipping insertion in model container [2023-03-31 22:31:45,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:31:45" (1/1) ... [2023-03-31 22:31:45,693 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:31:45,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:31:46,030 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/Problem19_label33.c[5530,5543] [2023-03-31 22:31:46,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:31:46,860 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:31:46,886 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/Problem19_label33.c[5530,5543] [2023-03-31 22:31:47,555 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:31:47,587 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:31:47,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:47 WrapperNode [2023-03-31 22:31:47,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:31:47,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:31:47,589 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:31:47,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:31:47,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:47" (1/1) ... [2023-03-31 22:31:47,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:47" (1/1) ... [2023-03-31 22:31:47,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:47" (1/1) ... [2023-03-31 22:31:47,676 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:47" (1/1) ... [2023-03-31 22:31:47,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:47" (1/1) ... [2023-03-31 22:31:47,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:47" (1/1) ... [2023-03-31 22:31:47,839 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:47" (1/1) ... [2023-03-31 22:31:47,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:47" (1/1) ... [2023-03-31 22:31:47,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:31:47,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:31:47,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:31:47,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:31:47,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:47" (1/1) ... [2023-03-31 22:31:47,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:31:47,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:31:47,970 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 22:31:48,039 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 22:31:48,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:31:48,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:31:48,085 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:31:48,085 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:31:48,085 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:31:48,086 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:31:48,086 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:31:48,086 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-31 22:31:48,086 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-31 22:31:48,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:31:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:31:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:31:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:31:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:31:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-31 22:31:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-31 22:31:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:31:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:31:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:31:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:31:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:31:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:31:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:31:48,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:31:48,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:31:48,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:31:48,088 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:31:48,088 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:31:48,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:31:48,187 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:31:48,189 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:31:54,021 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:32:07,991 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:32:07,992 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:32:07,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:32:07 BoogieIcfgContainer [2023-03-31 22:32:07,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:32:07,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:32:07,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:32:08,001 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:32:08,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:31:45" (1/3) ... [2023-03-31 22:32:08,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fab9205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:32:08, skipping insertion in model container [2023-03-31 22:32:08,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:31:47" (2/3) ... [2023-03-31 22:32:08,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fab9205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:32:08, skipping insertion in model container [2023-03-31 22:32:08,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:32:07" (3/3) ... [2023-03-31 22:32:08,003 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label33.c [2023-03-31 22:32:08,035 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:32:08,036 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:32:08,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:32:08,127 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;@2b289665, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:32:08,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:32:08,135 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 22:32:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:32:08,140 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:08,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:32:08,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:08,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:08,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1235900899, now seen corresponding path program 1 times [2023-03-31 22:32:08,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:08,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480573926] [2023-03-31 22:32:08,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:08,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:08,474 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 22:32:08,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:08,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480573926] [2023-03-31 22:32:08,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480573926] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:08,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:08,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:32:08,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754493286] [2023-03-31 22:32:08,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:08,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:32:08,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:08,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:32:08,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:32:08,503 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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 22:32:13,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:32:13,536 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-03-31 22:32:13,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:32:13,555 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 22:32:13,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:32:13,577 INFO L225 Difference]: With dead ends: 3418 [2023-03-31 22:32:13,577 INFO L226 Difference]: Without dead ends: 2271 [2023-03-31 22:32:13,585 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 22:32:13,589 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1265 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 4581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:32:13,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 737 Invalid, 4581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1219 Valid, 3362 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-03-31 22:32:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-03-31 22:32:13,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-03-31 22:32:13,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.6464556397681676) internal successors, (3693), 2243 states have internal predecessors, (3693), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-03-31 22:32:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3728 transitions. [2023-03-31 22:32:13,719 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3728 transitions. Word has length 11 [2023-03-31 22:32:13,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:32:13,719 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 3728 transitions. [2023-03-31 22:32:13,719 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 22:32:13,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3728 transitions. [2023-03-31 22:32:13,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:32:13,720 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:13,720 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:32:13,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:32:13,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:13,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:13,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1881857474, now seen corresponding path program 1 times [2023-03-31 22:32:13,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:13,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903514216] [2023-03-31 22:32:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:13,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:13,881 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 22:32:13,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:13,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903514216] [2023-03-31 22:32:13,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903514216] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:13,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:13,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:32:13,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019170478] [2023-03-31 22:32:13,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:13,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:32:13,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:13,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:32:13,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:32:13,883 INFO L87 Difference]: Start difference. First operand 2269 states and 3728 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:32:23,217 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 [] [2023-03-31 22:32:23,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:32:23,478 INFO L93 Difference]: Finished difference Result 6943 states and 11442 transitions. [2023-03-31 22:32:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:32:23,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-03-31 22:32:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:32:23,503 INFO L225 Difference]: With dead ends: 6943 [2023-03-31 22:32:23,503 INFO L226 Difference]: Without dead ends: 4679 [2023-03-31 22:32:23,510 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 22:32:23,511 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 4036 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6593 mSolverCounterSat, 1794 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1794 IncrementalHoareTripleChecker+Valid, 6593 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:32:23,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4036 Valid, 181 Invalid, 8388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1794 Valid, 6593 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2023-03-31 22:32:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2023-03-31 22:32:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4607. [2023-03-31 22:32:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4531 states have (on average 1.414036636504083) internal successors, (6407), 4537 states have internal predecessors, (6407), 23 states have call successors, (23), 23 states have call predecessors, (23), 52 states have return successors, (137), 46 states have call predecessors, (137), 22 states have call successors, (137) [2023-03-31 22:32:23,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 6567 transitions. [2023-03-31 22:32:23,644 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 6567 transitions. Word has length 21 [2023-03-31 22:32:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:32:23,645 INFO L495 AbstractCegarLoop]: Abstraction has 4607 states and 6567 transitions. [2023-03-31 22:32:23,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:32:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 6567 transitions. [2023-03-31 22:32:23,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:32:23,646 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:23,646 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:32:23,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:32:23,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:23,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:23,647 INFO L85 PathProgramCache]: Analyzing trace with hash 854249065, now seen corresponding path program 1 times [2023-03-31 22:32:23,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:23,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123652768] [2023-03-31 22:32:23,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:23,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:23,902 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 22:32:23,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:23,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123652768] [2023-03-31 22:32:23,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123652768] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:23,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:23,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:32:23,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561266101] [2023-03-31 22:32:23,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:23,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:32:23,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:23,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:32:23,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:32:23,905 INFO L87 Difference]: Start difference. First operand 4607 states and 6567 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) [2023-03-31 22:32:30,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:32:30,496 INFO L93 Difference]: Finished difference Result 14148 states and 20540 transitions. [2023-03-31 22:32:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:32:30,522 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 [2023-03-31 22:32:30,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:32:30,564 INFO L225 Difference]: With dead ends: 14148 [2023-03-31 22:32:30,564 INFO L226 Difference]: Without dead ends: 9546 [2023-03-31 22:32:30,571 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 22:32:30,590 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 3495 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7164 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 8265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 7164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:32:30,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 175 Invalid, 8265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 7164 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-03-31 22:32:30,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2023-03-31 22:32:30,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8592. [2023-03-31 22:32:30,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8362 states have (on average 1.4227457546041617) internal successors, (11897), 8395 states have internal predecessors, (11897), 40 states have call successors, (40), 40 states have call predecessors, (40), 189 states have return successors, (602), 156 states have call predecessors, (602), 39 states have call successors, (602) [2023-03-31 22:32:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 12539 transitions. [2023-03-31 22:32:30,887 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 12539 transitions. Word has length 23 [2023-03-31 22:32:30,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:32:30,888 INFO L495 AbstractCegarLoop]: Abstraction has 8592 states and 12539 transitions. [2023-03-31 22:32:30,888 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) [2023-03-31 22:32:30,888 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 12539 transitions. [2023-03-31 22:32:30,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 22:32:30,889 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:30,889 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] [2023-03-31 22:32:30,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:32:30,889 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:30,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:30,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1269456735, now seen corresponding path program 1 times [2023-03-31 22:32:30,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:30,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824357756] [2023-03-31 22:32:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:30,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:31,050 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 22:32:31,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:31,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824357756] [2023-03-31 22:32:31,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824357756] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:31,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:32:31,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:32:31,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898506618] [2023-03-31 22:32:31,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:31,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:32:31,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:31,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:32:31,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:32:31,052 INFO L87 Difference]: Start difference. First operand 8592 states and 12539 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 22:32:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:32:37,920 INFO L93 Difference]: Finished difference Result 26245 states and 39095 transitions. [2023-03-31 22:32:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:32:37,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 33 [2023-03-31 22:32:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:32:37,980 INFO L225 Difference]: With dead ends: 26245 [2023-03-31 22:32:37,980 INFO L226 Difference]: Without dead ends: 17658 [2023-03-31 22:32:37,998 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 22:32:38,003 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 5995 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6471 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5995 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 7174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 6471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:32:38,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5995 Valid, 147 Invalid, 7174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 6471 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-03-31 22:32:38,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17658 states. [2023-03-31 22:32:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17658 to 17126. [2023-03-31 22:32:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17126 states, 16569 states have (on average 1.3635705232663407) internal successors, (22593), 16669 states have internal predecessors, (22593), 76 states have call successors, (76), 76 states have call predecessors, (76), 480 states have return successors, (1564), 380 states have call predecessors, (1564), 75 states have call successors, (1564) [2023-03-31 22:32:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17126 states to 17126 states and 24233 transitions. [2023-03-31 22:32:38,454 INFO L78 Accepts]: Start accepts. Automaton has 17126 states and 24233 transitions. Word has length 33 [2023-03-31 22:32:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:32:38,454 INFO L495 AbstractCegarLoop]: Abstraction has 17126 states and 24233 transitions. [2023-03-31 22:32:38,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 22:32:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 17126 states and 24233 transitions. [2023-03-31 22:32:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 22:32:38,455 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:38,456 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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 22:32:38,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:32:38,456 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:38,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1537117270, now seen corresponding path program 1 times [2023-03-31 22:32:38,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:38,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804301335] [2023-03-31 22:32:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:38,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:32:38,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:38,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804301335] [2023-03-31 22:32:38,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804301335] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:32:38,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260951047] [2023-03-31 22:32:38,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:38,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:32:38,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:32:38,664 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 22:32:38,671 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 22:32:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:38,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:32:38,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:32:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:32:38,877 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:32:38,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260951047] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:32:38,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:32:38,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:32:38,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966658030] [2023-03-31 22:32:38,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:32:38,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:32:38,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:32:38,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:32:38,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:32:38,881 INFO L87 Difference]: Start difference. First operand 17126 states and 24233 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 22:32:45,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:32:45,725 INFO L93 Difference]: Finished difference Result 46953 states and 69710 transitions. [2023-03-31 22:32:45,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:32:45,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 60 [2023-03-31 22:32:45,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:32:45,873 INFO L225 Difference]: With dead ends: 46953 [2023-03-31 22:32:45,873 INFO L226 Difference]: Without dead ends: 29832 [2023-03-31 22:32:45,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:32:45,903 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 3504 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 5917 mSolverCounterSat, 3178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3504 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 9095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3178 IncrementalHoareTripleChecker+Valid, 5917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:32:45,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3504 Valid, 135 Invalid, 9095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3178 Valid, 5917 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2023-03-31 22:32:45,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29832 states. [2023-03-31 22:32:46,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29832 to 29383. [2023-03-31 22:32:46,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29383 states, 28350 states have (on average 1.3067372134038802) internal successors, (37046), 28547 states have internal predecessors, (37046), 126 states have call successors, (126), 126 states have call predecessors, (126), 906 states have return successors, (3790), 709 states have call predecessors, (3790), 125 states have call successors, (3790) [2023-03-31 22:32:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29383 states to 29383 states and 40962 transitions. [2023-03-31 22:32:46,518 INFO L78 Accepts]: Start accepts. Automaton has 29383 states and 40962 transitions. Word has length 60 [2023-03-31 22:32:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:32:46,519 INFO L495 AbstractCegarLoop]: Abstraction has 29383 states and 40962 transitions. [2023-03-31 22:32:46,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 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 22:32:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 29383 states and 40962 transitions. [2023-03-31 22:32:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-03-31 22:32:46,531 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:32:46,531 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2023-03-31 22:32:46,549 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 22:32:46,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:32:46,736 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:32:46,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:32:46,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1880386637, now seen corresponding path program 1 times [2023-03-31 22:32:46,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:32:46,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86734988] [2023-03-31 22:32:46,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:46,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:32:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 56 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 22:32:47,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:32:47,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86734988] [2023-03-31 22:32:47,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86734988] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:32:47,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864610256] [2023-03-31 22:32:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:32:47,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:32:47,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:32:47,117 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 22:32:47,118 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 22:32:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:32:47,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:32:47,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:32:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:32:47,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:32:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 56 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-31 22:32:47,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864610256] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:32:47,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [746893188] [2023-03-31 22:32:47,568 INFO L159 IcfgInterpreter]: Started Sifa with 171 locations of interest [2023-03-31 22:32:47,568 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:32:47,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:32:47,574 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:32:47,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:32:47,691 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2023-03-31 22:32:47,959 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 35 [2023-03-31 22:32:48,095 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8168 conjuctions. This might take some time... [2023-03-31 22:32:48,270 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 66 conjuctions. [2023-03-31 22:32:48,305 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 26