/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:59:01,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:59:01,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:59:01,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:59:01,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:59:01,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:59:01,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:59:01,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:59:01,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:59:01,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:59:01,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:59:01,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:59:01,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:59:01,785 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:59:01,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:59:01,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:59:01,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:59:01,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:59:01,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:59:01,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:59:01,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:59:01,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:59:01,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:59:01,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:59:01,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:59:01,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:59:01,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:59:01,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:59:01,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:59:01,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:59:01,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:59:01,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:59:01,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:59:01,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:59:01,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:59:01,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:59:01,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:59:01,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:59:01,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:59:01,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:59:01,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:59:01,817 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 21:59:01,846 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:59:01,847 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:59:01,847 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:59:01,847 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:59:01,848 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:59:01,848 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:59:01,848 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:59:01,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:59:01,849 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:59:01,849 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:59:01,849 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:59:01,850 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:59:01,850 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:59:01,850 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:59:01,850 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:59:01,850 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:59:01,850 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:59:01,850 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:59:01,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:59:01,851 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:59:01,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:59:01,851 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:59:01,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:59:01,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:59:01,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:59:01,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:59:01,852 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:59:01,852 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:59:01,852 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:59:01,852 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:59:01,852 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:59:01,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:59:01,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:59:01,853 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:59:01,853 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:59:01,853 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:59:01,853 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:59:01,853 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:59:01,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:59:01,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:59:01,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:59:01,853 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:59:02,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:59:02,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:59:02,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:59:02,061 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:59:02,061 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:59:02,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label24.c [2023-03-31 21:59:03,204 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:59:03,608 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:59:03,608 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label24.c [2023-03-31 21:59:03,636 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6f5ce94c/f28bf2f01e454e06bfbed88983fe9669/FLAG88484121b [2023-03-31 21:59:03,650 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6f5ce94c/f28bf2f01e454e06bfbed88983fe9669 [2023-03-31 21:59:03,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:59:03,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:59:03,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:59:03,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:59:03,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:59:03,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:59:03" (1/1) ... [2023-03-31 21:59:03,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56ddf70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:03, skipping insertion in model container [2023-03-31 21:59:03,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:59:03" (1/1) ... [2023-03-31 21:59:03,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:59:03,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:59:04,016 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label24.c[5810,5823] [2023-03-31 21:59:04,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:59:04,729 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:59:04,755 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label24.c[5810,5823] [2023-03-31 21:59:05,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:59:05,188 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:59:05,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:05 WrapperNode [2023-03-31 21:59:05,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:59:05,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:59:05,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:59:05,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:59:05,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:05" (1/1) ... [2023-03-31 21:59:05,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:05" (1/1) ... [2023-03-31 21:59:05,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:05" (1/1) ... [2023-03-31 21:59:05,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:05" (1/1) ... [2023-03-31 21:59:05,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:05" (1/1) ... [2023-03-31 21:59:05,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:05" (1/1) ... [2023-03-31 21:59:05,450 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:05" (1/1) ... [2023-03-31 21:59:05,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:05" (1/1) ... [2023-03-31 21:59:05,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:59:05,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:59:05,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:59:05,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:59:05,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:05" (1/1) ... [2023-03-31 21:59:05,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:59:05,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:59:05,530 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 21:59:05,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 21:59:05,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:59:05,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:59:05,568 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:59:05,568 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:59:05,568 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 21:59:05,568 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 21:59:05,568 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 21:59:05,568 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:59:05,568 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:59:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 21:59:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 21:59:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 21:59:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:59:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:59:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:59:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:59:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:59:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:59:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:59:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:59:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:59:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:59:05,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:59:05,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:59:05,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:59:05,655 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:59:05,656 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:59:09,149 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:59:09,700 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:59:09,700 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:59:09,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:59:09 BoogieIcfgContainer [2023-03-31 21:59:09,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:59:09,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:59:09,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:59:09,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:59:09,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:59:03" (1/3) ... [2023-03-31 21:59:09,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b81a60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:59:09, skipping insertion in model container [2023-03-31 21:59:09,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:59:05" (2/3) ... [2023-03-31 21:59:09,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b81a60a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:59:09, skipping insertion in model container [2023-03-31 21:59:09,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:59:09" (3/3) ... [2023-03-31 21:59:09,713 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label24.c [2023-03-31 21:59:09,728 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:59:09,728 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:59:09,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:59:09,850 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;@4e127b71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:59:09,851 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:59:09,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 21:59:09,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 21:59:09,865 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:09,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:59:09,866 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:09,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:09,871 INFO L85 PathProgramCache]: Analyzing trace with hash 636343809, now seen corresponding path program 1 times [2023-03-31 21:59:09,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:09,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68717216] [2023-03-31 21:59:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:09,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:59:10,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:10,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68717216] [2023-03-31 21:59:10,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68717216] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:59:10,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:59:10,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:59:10,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409293365] [2023-03-31 21:59:10,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:59:10,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:59:10,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:59:10,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:59:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:59:10,233 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:59:13,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:59:13,380 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 21:59:13,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:59:13,382 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 21:59:13,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:59:13,402 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 21:59:13,402 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 21:59:13,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:59:13,413 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 789 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 2876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-03-31 21:59:13,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 155 Invalid, 2876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-03-31 21:59:13,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 21:59:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1357. [2023-03-31 21:59:13,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1339 states have (on average 1.9066467513069454) internal successors, (2553), 1339 states have internal predecessors, (2553), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-03-31 21:59:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2576 transitions. [2023-03-31 21:59:13,513 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2576 transitions. Word has length 11 [2023-03-31 21:59:13,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:59:13,514 INFO L495 AbstractCegarLoop]: Abstraction has 1357 states and 2576 transitions. [2023-03-31 21:59:13,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:59:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2576 transitions. [2023-03-31 21:59:13,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 21:59:13,516 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:13,516 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] [2023-03-31 21:59:13,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:59:13,516 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:13,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:13,517 INFO L85 PathProgramCache]: Analyzing trace with hash -547324044, now seen corresponding path program 1 times [2023-03-31 21:59:13,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:13,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039429515] [2023-03-31 21:59:13,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:13,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:13,754 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 21:59:13,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:13,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039429515] [2023-03-31 21:59:13,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039429515] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:59:13,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:59:13,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:59:13,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818514249] [2023-03-31 21:59:13,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:59:13,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:59:13,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:59:13,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:59:13,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:59:13,758 INFO L87 Difference]: Start difference. First operand 1357 states and 2576 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:59:17,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:59:17,792 INFO L93 Difference]: Finished difference Result 4113 states and 7854 transitions. [2023-03-31 21:59:17,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:59:17,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-03-31 21:59:17,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:59:17,810 INFO L225 Difference]: With dead ends: 4113 [2023-03-31 21:59:17,811 INFO L226 Difference]: Without dead ends: 2761 [2023-03-31 21:59:17,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:59:17,825 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2449 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 4106 mSolverCounterSat, 889 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2449 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 4995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 889 IncrementalHoareTripleChecker+Valid, 4106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-03-31 21:59:17,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2449 Valid, 108 Invalid, 4995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [889 Valid, 4106 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-03-31 21:59:17,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2023-03-31 21:59:17,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2723. [2023-03-31 21:59:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2723 states, 2681 states have (on average 1.7582991421111525) internal successors, (4714), 2685 states have internal predecessors, (4714), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (74), 22 states have call predecessors, (74), 14 states have call successors, (74) [2023-03-31 21:59:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2723 states to 2723 states and 4803 transitions. [2023-03-31 21:59:17,939 INFO L78 Accepts]: Start accepts. Automaton has 2723 states and 4803 transitions. Word has length 25 [2023-03-31 21:59:17,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:59:17,940 INFO L495 AbstractCegarLoop]: Abstraction has 2723 states and 4803 transitions. [2023-03-31 21:59:17,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:59:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 2723 states and 4803 transitions. [2023-03-31 21:59:17,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-31 21:59:17,941 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:17,941 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] [2023-03-31 21:59:17,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:59:17,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:17,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:17,942 INFO L85 PathProgramCache]: Analyzing trace with hash -215679216, now seen corresponding path program 1 times [2023-03-31 21:59:17,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:17,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303455436] [2023-03-31 21:59:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:17,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:59:18,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:18,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303455436] [2023-03-31 21:59:18,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303455436] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:59:18,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257601953] [2023-03-31 21:59:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:18,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:59:18,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:59:18,205 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:59:18,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:59:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:18,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:59:18,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:59:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:59:18,350 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:59:18,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257601953] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:59:18,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:59:18,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-03-31 21:59:18,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903631054] [2023-03-31 21:59:18,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:59:18,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:59:18,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:59:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:59:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-03-31 21:59:18,356 INFO L87 Difference]: Start difference. First operand 2723 states and 4803 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:59:21,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:59:21,280 INFO L93 Difference]: Finished difference Result 8149 states and 14600 transitions. [2023-03-31 21:59:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:59:21,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-03-31 21:59:21,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:59:21,311 INFO L225 Difference]: With dead ends: 8149 [2023-03-31 21:59:21,311 INFO L226 Difference]: Without dead ends: 5431 [2023-03-31 21:59:21,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-03-31 21:59:21,319 INFO L413 NwaCegarLoop]: 1167 mSDtfsCounter, 686 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-03-31 21:59:21,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1195 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-03-31 21:59:21,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2023-03-31 21:59:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 5428. [2023-03-31 21:59:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5352 states have (on average 1.6429372197309418) internal successors, (8793), 5360 states have internal predecessors, (8793), 27 states have call successors, (27), 27 states have call predecessors, (27), 48 states have return successors, (281), 40 states have call predecessors, (281), 26 states have call successors, (281) [2023-03-31 21:59:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 9101 transitions. [2023-03-31 21:59:21,461 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 9101 transitions. Word has length 27 [2023-03-31 21:59:21,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:59:21,462 INFO L495 AbstractCegarLoop]: Abstraction has 5428 states and 9101 transitions. [2023-03-31 21:59:21,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 21:59:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 9101 transitions. [2023-03-31 21:59:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-31 21:59:21,465 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:21,465 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] [2023-03-31 21:59:21,475 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 21:59:21,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:59:21,672 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:21,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:21,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1537321700, now seen corresponding path program 1 times [2023-03-31 21:59:21,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:21,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806367746] [2023-03-31 21:59:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:21,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:59:21,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:21,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806367746] [2023-03-31 21:59:21,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806367746] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:59:21,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:59:21,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:59:21,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665338548] [2023-03-31 21:59:21,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:59:21,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:59:21,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:59:21,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:59:21,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:59:21,857 INFO L87 Difference]: Start difference. First operand 5428 states and 9101 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:59:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:59:25,679 INFO L93 Difference]: Finished difference Result 16572 states and 28805 transitions. [2023-03-31 21:59:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:59:25,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-03-31 21:59:25,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:59:25,742 INFO L225 Difference]: With dead ends: 16572 [2023-03-31 21:59:25,742 INFO L226 Difference]: Without dead ends: 11149 [2023-03-31 21:59:25,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:59:25,764 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2670 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 4013 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2670 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 4683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-03-31 21:59:25,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2670 Valid, 91 Invalid, 4683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4013 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-03-31 21:59:25,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11149 states. [2023-03-31 21:59:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11149 to 8400. [2023-03-31 21:59:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8400 states, 8200 states have (on average 1.5396341463414633) internal successors, (12625), 8243 states have internal predecessors, (12625), 41 states have call successors, (41), 41 states have call predecessors, (41), 158 states have return successors, (960), 115 states have call predecessors, (960), 40 states have call successors, (960) [2023-03-31 21:59:26,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8400 states to 8400 states and 13626 transitions. [2023-03-31 21:59:26,061 INFO L78 Accepts]: Start accepts. Automaton has 8400 states and 13626 transitions. Word has length 37 [2023-03-31 21:59:26,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:59:26,062 INFO L495 AbstractCegarLoop]: Abstraction has 8400 states and 13626 transitions. [2023-03-31 21:59:26,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 21:59:26,062 INFO L276 IsEmpty]: Start isEmpty. Operand 8400 states and 13626 transitions. [2023-03-31 21:59:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 21:59:26,068 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:59:26,069 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:59:26,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 21:59:26,069 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:59:26,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:59:26,069 INFO L85 PathProgramCache]: Analyzing trace with hash 674701891, now seen corresponding path program 1 times [2023-03-31 21:59:26,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:59:26,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603361639] [2023-03-31 21:59:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:26,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:59:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:59:26,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:59:26,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603361639] [2023-03-31 21:59:26,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603361639] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:59:26,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885357693] [2023-03-31 21:59:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:59:26,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:59:26,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:59:26,261 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:59:26,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:59:26,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:59:26,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:59:26,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:59:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:59:26,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:59:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:59:26,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885357693] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:59:26,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1984689988] [2023-03-31 21:59:26,544 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 21:59:26,544 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:59:26,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:59:26,551 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:59:26,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:59:26,701 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-03-31 21:59:26,860 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2023-03-31 21:59:27,057 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2023-03-31 21:59:27,622 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 49 for LOIs [2023-03-31 21:59:27,789 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2023-03-31 21:59:29,358 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2023-03-31 21:59:30,022 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 70304 conjuctions. This might take some time... [2023-03-31 21:59:43,664 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1984 conjuctions. [2023-03-31 21:59:55,905 WARN L223 SmtUtils]: Spent 5.33s on a formula simplification that was a NOOP. DAG size: 419 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)