/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/Problem15_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:10:53,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:10:53,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:10:53,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:10:53,794 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:10:53,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:10:53,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:10:53,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:10:53,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:10:53,810 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:10:53,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:10:53,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:10:53,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:10:53,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:10:53,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:10:53,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:10:53,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:10:53,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:10:53,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:10:53,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:10:53,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:10:53,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:10:53,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:10:53,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:10:53,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:10:53,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:10:53,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:10:53,839 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:10:53,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:10:53,840 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:10:53,840 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:10:53,841 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:10:53,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:10:53,843 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:10:53,844 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:10:53,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:10:53,844 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:10:53,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:10:53,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:10:53,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:10:53,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:10:53,847 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 22:10:53,877 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:10:53,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:10:53,878 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:10:53,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:10:53,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:10:53,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:10:53,879 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:10:53,879 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:10:53,880 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:10:53,880 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:10:53,880 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:10:53,881 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:10:53,881 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:10:53,881 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:10:53,881 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:10:53,881 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:10:53,881 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:10:53,882 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:10:53,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:10:53,882 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:10:53,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:10:53,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:10:53,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:10:53,883 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:10:53,883 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:10:53,883 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:10:53,884 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:10:53,884 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:10:53,884 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:10:53,884 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:10:53,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:10:53,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:10:53,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:10:53,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:10:53,885 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:10:53,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:10:53,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:10:53,885 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:10:53,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:10:53,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:10:53,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:10:53,886 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:10:54,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:10:54,104 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:10:54,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:10:54,108 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:10:54,108 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:10:54,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label07.c [2023-03-31 22:10:55,369 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:10:55,683 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:10:55,683 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label07.c [2023-03-31 22:10:55,713 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a0f68226/a684db7fcb214d3cbb3c41f5f325acc5/FLAG5914c4ba3 [2023-03-31 22:10:55,728 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a0f68226/a684db7fcb214d3cbb3c41f5f325acc5 [2023-03-31 22:10:55,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:10:55,731 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:10:55,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:10:55,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:10:55,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:10:55,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:10:55" (1/1) ... [2023-03-31 22:10:55,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b3786fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:55, skipping insertion in model container [2023-03-31 22:10:55,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:10:55" (1/1) ... [2023-03-31 22:10:55,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:10:55,814 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:10:56,010 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/Problem15_label07.c[1469,1482] [2023-03-31 22:10:56,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:10:56,459 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:10:56,477 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/Problem15_label07.c[1469,1482] [2023-03-31 22:10:56,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:10:56,764 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:10:56,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:56 WrapperNode [2023-03-31 22:10:56,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:10:56,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:10:56,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:10:56,767 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:10:56,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:56" (1/1) ... [2023-03-31 22:10:56,778 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:56" (1/1) ... [2023-03-31 22:10:56,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:56" (1/1) ... [2023-03-31 22:10:56,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:56" (1/1) ... [2023-03-31 22:10:56,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:56" (1/1) ... [2023-03-31 22:10:56,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:56" (1/1) ... [2023-03-31 22:10:56,920 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:56" (1/1) ... [2023-03-31 22:10:56,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:56" (1/1) ... [2023-03-31 22:10:56,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:10:56,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:10:56,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:10:56,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:10:56,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:56" (1/1) ... [2023-03-31 22:10:56,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:10:56,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:10:56,982 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 22:10:57,001 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 22:10:57,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:10:57,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:10:57,032 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:10:57,032 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:10:57,033 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:10:57,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:10:57,033 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:10:57,033 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:10:57,033 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:10:57,033 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:10:57,033 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:10:57,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:10:57,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:10:57,033 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:10:57,033 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:10:57,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:10:57,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:10:57,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:10:57,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:10:57,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:10:57,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:10:57,094 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:10:57,096 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:10:59,622 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:11:00,402 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:11:00,402 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:11:00,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:11:00 BoogieIcfgContainer [2023-03-31 22:11:00,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:11:00,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:11:00,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:11:00,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:11:00,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:10:55" (1/3) ... [2023-03-31 22:11:00,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83d75dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:11:00, skipping insertion in model container [2023-03-31 22:11:00,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:10:56" (2/3) ... [2023-03-31 22:11:00,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83d75dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:11:00, skipping insertion in model container [2023-03-31 22:11:00,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:11:00" (3/3) ... [2023-03-31 22:11:00,415 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label07.c [2023-03-31 22:11:00,442 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:11:00,442 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:11:00,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:11:00,507 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;@18c4d22f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:11:00,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:11:00,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:11:00,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:11:00,519 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:00,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:11:00,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:00,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:00,526 INFO L85 PathProgramCache]: Analyzing trace with hash 271502074, now seen corresponding path program 1 times [2023-03-31 22:11:00,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:00,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559213255] [2023-03-31 22:11:00,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:00,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:00,811 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 22:11:00,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:00,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559213255] [2023-03-31 22:11:00,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559213255] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:11:00,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:11:00,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:11:00,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406248665] [2023-03-31 22:11:00,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:00,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:11:00,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:00,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:11:00,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:11:00,854 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:11:02,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:02,414 INFO L93 Difference]: Finished difference Result 720 states and 1390 transitions. [2023-03-31 22:11:02,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:11:02,419 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 22:11:02,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:02,431 INFO L225 Difference]: With dead ends: 720 [2023-03-31 22:11:02,431 INFO L226 Difference]: Without dead ends: 473 [2023-03-31 22:11:02,436 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 22:11:02,439 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 248 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:02,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 177 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-03-31 22:11:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-03-31 22:11:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2023-03-31 22:11:02,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 461 states have (on average 1.596529284164859) internal successors, (736), 461 states have internal predecessors, (736), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-03-31 22:11:02,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 749 transitions. [2023-03-31 22:11:02,530 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 749 transitions. Word has length 11 [2023-03-31 22:11:02,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:02,530 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 749 transitions. [2023-03-31 22:11:02,532 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 22:11:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 749 transitions. [2023-03-31 22:11:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 22:11:02,534 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:02,534 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] [2023-03-31 22:11:02,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:11:02,535 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:02,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:02,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1394878520, now seen corresponding path program 1 times [2023-03-31 22:11:02,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:02,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970470146] [2023-03-31 22:11:02,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:02,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:02,754 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 22:11:02,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970470146] [2023-03-31 22:11:02,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970470146] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:11:02,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:11:02,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:11:02,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835413269] [2023-03-31 22:11:02,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:02,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:11:02,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:02,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:11:02,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:11:02,759 INFO L87 Difference]: Start difference. First operand 473 states and 749 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 22:11:05,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:05,342 INFO L93 Difference]: Finished difference Result 1426 states and 2281 transitions. [2023-03-31 22:11:05,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:11:05,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-03-31 22:11:05,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:05,349 INFO L225 Difference]: With dead ends: 1426 [2023-03-31 22:11:05,351 INFO L226 Difference]: Without dead ends: 958 [2023-03-31 22:11:05,353 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 22:11:05,354 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 671 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:05,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 55 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1785 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-03-31 22:11:05,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2023-03-31 22:11:05,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 940. [2023-03-31 22:11:05,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 916 states have (on average 1.4912663755458515) internal successors, (1366), 924 states have internal predecessors, (1366), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2023-03-31 22:11:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1406 transitions. [2023-03-31 22:11:05,410 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1406 transitions. Word has length 31 [2023-03-31 22:11:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:05,410 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1406 transitions. [2023-03-31 22:11:05,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 22:11:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1406 transitions. [2023-03-31 22:11:05,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 22:11:05,412 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:05,412 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] [2023-03-31 22:11:05,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:11:05,412 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:05,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1157620816, now seen corresponding path program 1 times [2023-03-31 22:11:05,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:05,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079267390] [2023-03-31 22:11:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:05,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:05,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:05,699 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 22:11:05,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:05,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079267390] [2023-03-31 22:11:05,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079267390] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:11:05,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:11:05,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:11:05,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957834400] [2023-03-31 22:11:05,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:05,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:11:05,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:05,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:11:05,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:11:05,705 INFO L87 Difference]: Start difference. First operand 940 states and 1406 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:07,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:07,711 INFO L93 Difference]: Finished difference Result 2858 states and 4368 transitions. [2023-03-31 22:11:07,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:11:07,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2023-03-31 22:11:07,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:07,720 INFO L225 Difference]: With dead ends: 2858 [2023-03-31 22:11:07,721 INFO L226 Difference]: Without dead ends: 1923 [2023-03-31 22:11:07,731 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 22:11:07,734 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:07,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-03-31 22:11:07,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2023-03-31 22:11:07,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1666. [2023-03-31 22:11:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1616 states have (on average 1.3422029702970297) internal successors, (2169), 1640 states have internal predecessors, (2169), 13 states have call successors, (13), 13 states have call predecessors, (13), 36 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) [2023-03-31 22:11:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2264 transitions. [2023-03-31 22:11:07,808 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2264 transitions. Word has length 35 [2023-03-31 22:11:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:07,808 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2264 transitions. [2023-03-31 22:11:07,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2264 transitions. [2023-03-31 22:11:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-03-31 22:11:07,818 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:07,819 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:11:07,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:11:07,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:07,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1421941139, now seen corresponding path program 1 times [2023-03-31 22:11:07,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:07,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517732265] [2023-03-31 22:11:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:07,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:11:08,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:08,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517732265] [2023-03-31 22:11:08,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517732265] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:11:08,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481671276] [2023-03-31 22:11:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:08,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:11:08,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:11:08,381 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 22:11:08,392 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 22:11:08,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:08,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 22:11:08,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:11:08,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:11:08,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:11:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:11:09,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481671276] provided 1 perfect and 1 imperfect interpolant sequences [2023-03-31 22:11:09,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-03-31 22:11:09,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 7 [2023-03-31 22:11:09,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370046671] [2023-03-31 22:11:09,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:09,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 22:11:09,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:09,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 22:11:09,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:11:09,248 INFO L87 Difference]: Start difference. First operand 1666 states and 2264 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:11,329 INFO L93 Difference]: Finished difference Result 4958 states and 6876 transitions. [2023-03-31 22:11:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 22:11:11,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 152 [2023-03-31 22:11:11,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:11,351 INFO L225 Difference]: With dead ends: 4958 [2023-03-31 22:11:11,351 INFO L226 Difference]: Without dead ends: 3297 [2023-03-31 22:11:11,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:11:11,361 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 348 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:11,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 35 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-03-31 22:11:11,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3297 states. [2023-03-31 22:11:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3297 to 2508. [2023-03-31 22:11:11,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2433 states have (on average 1.3571722153719687) internal successors, (3302), 2470 states have internal predecessors, (3302), 19 states have call successors, (19), 19 states have call predecessors, (19), 55 states have return successors, (235), 18 states have call predecessors, (235), 18 states have call successors, (235) [2023-03-31 22:11:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3556 transitions. [2023-03-31 22:11:11,445 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3556 transitions. Word has length 152 [2023-03-31 22:11:11,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:11,447 INFO L495 AbstractCegarLoop]: Abstraction has 2508 states and 3556 transitions. [2023-03-31 22:11:11,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:11:11,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3556 transitions. [2023-03-31 22:11:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-03-31 22:11:11,450 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:11,451 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:11:11,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:11:11,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:11:11,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:11,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:11,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2116014487, now seen corresponding path program 1 times [2023-03-31 22:11:11,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:11,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243412380] [2023-03-31 22:11:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:11,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-03-31 22:11:11,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:11,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243412380] [2023-03-31 22:11:11,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243412380] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:11:11,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:11:11,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:11:11,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092194169] [2023-03-31 22:11:11,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:11:11,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:11:11,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:11:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:11:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:11:11,954 INFO L87 Difference]: Start difference. First operand 2508 states and 3556 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:11:13,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:11:13,411 INFO L93 Difference]: Finished difference Result 6174 states and 9111 transitions. [2023-03-31 22:11:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:11:13,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 173 [2023-03-31 22:11:13,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:11:13,436 INFO L225 Difference]: With dead ends: 6174 [2023-03-31 22:11:13,436 INFO L226 Difference]: Without dead ends: 3671 [2023-03-31 22:11:13,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:11:13,446 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 228 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:11:13,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 429 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 22:11:13,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2023-03-31 22:11:13,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3420. [2023-03-31 22:11:13,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3330 states have (on average 1.2936936936936938) internal successors, (4308), 3372 states have internal predecessors, (4308), 24 states have call successors, (24), 24 states have call predecessors, (24), 65 states have return successors, (335), 23 states have call predecessors, (335), 23 states have call successors, (335) [2023-03-31 22:11:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 4667 transitions. [2023-03-31 22:11:13,535 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 4667 transitions. Word has length 173 [2023-03-31 22:11:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:11:13,537 INFO L495 AbstractCegarLoop]: Abstraction has 3420 states and 4667 transitions. [2023-03-31 22:11:13,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 22:11:13,537 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 4667 transitions. [2023-03-31 22:11:13,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-03-31 22:11:13,539 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:11:13,539 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:11:13,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:11:13,539 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:11:13,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:11:13,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1104529409, now seen corresponding path program 1 times [2023-03-31 22:11:13,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:11:13,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095860123] [2023-03-31 22:11:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:13,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:11:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:13,886 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:11:13,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095860123] [2023-03-31 22:11:13,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095860123] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:11:13,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707275162] [2023-03-31 22:11:13,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:11:13,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:11:13,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:11:13,888 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 22:11:13,915 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 22:11:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:11:14,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:11:14,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:11:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:14,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:11:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:11:14,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707275162] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:11:14,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [176400395] [2023-03-31 22:11:14,225 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-03-31 22:11:14,226 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:11:14,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:11:14,233 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:11:14,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:11:14,362 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-03-31 22:11:14,830 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 57 [2023-03-31 22:11:15,370 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 7772 conjuctions. This might take some time... [2023-03-31 22:11:15,523 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 58 conjuctions. [2023-03-31 22:11:16,681 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 42 for LOIs [2023-03-31 22:11:20,243 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 57