/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 OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem18_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:29:11,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:29:11,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:29:11,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:29:11,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:29:11,874 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:29:11,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:29:11,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:29:11,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:29:11,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:29:11,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:29:11,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:29:11,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:29:11,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:29:11,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:29:11,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:29:11,889 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:29:11,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:29:11,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:29:11,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:29:11,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:29:11,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:29:11,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:29:11,902 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:29:11,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:29:11,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:29:11,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:29:11,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:29:11,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:29:11,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:29:11,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:29:11,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:29:11,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:29:11,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:29:11,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:29:11,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:29:11,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:29:11,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:29:11,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:29:11,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:29:11,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:29:11,916 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:29:11,938 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:29:11,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:29:11,938 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:29:11,939 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:29:11,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:29:11,939 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:29:11,939 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:29:11,939 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:29:11,940 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:29:11,940 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:29:11,940 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:29:11,940 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:29:11,940 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:29:11,940 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:29:11,941 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:29:11,941 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:29:11,941 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:29:11,941 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:29:11,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:29:11,941 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:29:11,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:29:11,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:29:11,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:29:11,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:29:11,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:29:11,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:29:11,942 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:29:11,942 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:29:11,942 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:29:11,942 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:29:11,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:29:11,943 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:29:11,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:29:11,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:29:11,943 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:29:11,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:29:11,943 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:29:11,943 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:29:11,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:29:11,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:29:11,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:29:11,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:29:12,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:29:12,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:29:12,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:29:12,175 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:29:12,175 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:29:12,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label57.c [2023-04-01 04:29:13,216 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:29:13,494 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:29:13,494 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label57.c [2023-04-01 04:29:13,513 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acb85c9a1/3a9955ae7d9442218eab41c530febeff/FLAG11c4a94f1 [2023-04-01 04:29:13,527 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/acb85c9a1/3a9955ae7d9442218eab41c530febeff [2023-04-01 04:29:13,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:29:13,530 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:29:13,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:29:13,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:29:13,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:29:13,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:29:13" (1/1) ... [2023-04-01 04:29:13,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20c3fba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:13, skipping insertion in model container [2023-04-01 04:29:13,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:29:13" (1/1) ... [2023-04-01 04:29:13,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:29:13,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:29:13,762 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/Problem18_label57.c[1255,1268] [2023-04-01 04:29:14,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:29:14,253 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:29:14,262 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/Problem18_label57.c[1255,1268] [2023-04-01 04:29:14,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:29:14,467 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:29:14,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:14 WrapperNode [2023-04-01 04:29:14,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:29:14,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:29:14,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:29:14,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:29:14,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:14" (1/1) ... [2023-04-01 04:29:14,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:14" (1/1) ... [2023-04-01 04:29:14,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:14" (1/1) ... [2023-04-01 04:29:14,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:14" (1/1) ... [2023-04-01 04:29:14,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:14" (1/1) ... [2023-04-01 04:29:14,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:14" (1/1) ... [2023-04-01 04:29:14,622 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:14" (1/1) ... [2023-04-01 04:29:14,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:14" (1/1) ... [2023-04-01 04:29:14,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:29:14,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:29:14,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:29:14,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:29:14,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:14" (1/1) ... [2023-04-01 04:29:14,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:29:14,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:29:14,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:29:14,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:29:14,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:29:14,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:29:14,710 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:29:14,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:29:14,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:29:14,710 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:29:14,711 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:29:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:29:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:29:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:29:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:29:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:29:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:29:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:29:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:29:14,711 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:29:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:29:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:29:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:29:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:29:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:29:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:29:14,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:29:14,779 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:29:14,780 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:29:17,194 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:29:23,587 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:29:23,587 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:29:23,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:29:23 BoogieIcfgContainer [2023-04-01 04:29:23,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:29:23,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:29:23,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:29:23,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:29:23,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:29:13" (1/3) ... [2023-04-01 04:29:23,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5bfb19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:29:23, skipping insertion in model container [2023-04-01 04:29:23,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:29:14" (2/3) ... [2023-04-01 04:29:23,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5bfb19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:29:23, skipping insertion in model container [2023-04-01 04:29:23,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:29:23" (3/3) ... [2023-04-01 04:29:23,597 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label57.c [2023-04-01 04:29:23,612 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:29:23,613 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:29:23,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:29:23,681 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;@429aaaf1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:29:23,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:29:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:29:23,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:29:23,693 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:29:23,693 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:29:23,694 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:29:23,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:29:23,699 INFO L85 PathProgramCache]: Analyzing trace with hash 314112143, now seen corresponding path program 1 times [2023-04-01 04:29:23,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:29:23,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209596690] [2023-04-01 04:29:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:23,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:29:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:29:23,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:29:23,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209596690] [2023-04-01 04:29:23,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209596690] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:29:23,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:29:23,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:29:23,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728924436] [2023-04-01 04:29:23,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:29:23,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:29:23,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:29:23,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:29:23,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:29:23,966 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:29:25,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:29:25,851 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 04:29:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:29:25,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:29:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:29:25,868 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 04:29:25,868 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 04:29:25,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:29:25,877 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 472 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:29:25,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 366 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 04:29:25,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 04:29:25,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-01 04:29:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6209944751381216) internal successors, (1467), 905 states have internal predecessors, (1467), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 04:29:25,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1484 transitions. [2023-04-01 04:29:25,934 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1484 transitions. Word has length 11 [2023-04-01 04:29:25,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:29:25,934 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1484 transitions. [2023-04-01 04:29:25,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:29:25,934 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1484 transitions. [2023-04-01 04:29:25,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 04:29:25,935 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:29:25,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:29:25,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:29:25,936 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:29:25,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:29:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1841347654, now seen corresponding path program 1 times [2023-04-01 04:29:25,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:29:25,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574725923] [2023-04-01 04:29:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:25,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:29:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:29:26,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:29:26,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574725923] [2023-04-01 04:29:26,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574725923] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:29:26,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:29:26,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:29:26,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652416531] [2023-04-01 04:29:26,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:29:26,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:29:26,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:29:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:29:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:29:26,076 INFO L87 Difference]: Start difference. First operand 919 states and 1484 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:29:28,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:29:28,830 INFO L93 Difference]: Finished difference Result 2795 states and 4544 transitions. [2023-04-01 04:29:28,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:29:28,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22 [2023-04-01 04:29:28,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:29:28,838 INFO L225 Difference]: With dead ends: 2795 [2023-04-01 04:29:28,838 INFO L226 Difference]: Without dead ends: 1881 [2023-04-01 04:29:28,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:29:28,841 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1521 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3160 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1521 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 3160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:29:28,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1521 Valid, 93 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 3160 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 04:29:28,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2023-04-01 04:29:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1843. [2023-04-01 04:29:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1809 states have (on average 1.4145936981757876) internal successors, (2559), 1816 states have internal predecessors, (2559), 11 states have call successors, (11), 11 states have call predecessors, (11), 22 states have return successors, (54), 15 states have call predecessors, (54), 10 states have call successors, (54) [2023-04-01 04:29:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2624 transitions. [2023-04-01 04:29:28,889 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2624 transitions. Word has length 22 [2023-04-01 04:29:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:29:28,889 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2624 transitions. [2023-04-01 04:29:28,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:29:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2624 transitions. [2023-04-01 04:29:28,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 04:29:28,890 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:29:28,890 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:29:28,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:29:28,891 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:29:28,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:29:28,891 INFO L85 PathProgramCache]: Analyzing trace with hash -223105732, now seen corresponding path program 1 times [2023-04-01 04:29:28,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:29:28,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852913349] [2023-04-01 04:29:28,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:28,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:29:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:29:29,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:29:29,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852913349] [2023-04-01 04:29:29,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852913349] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:29:29,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011480331] [2023-04-01 04:29:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:29,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:29:29,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:29:29,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:29:29,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:29:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:29,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:29:29,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:29:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:29:29,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:29:29,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011480331] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:29:29,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:29:29,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:29:29,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253146438] [2023-04-01 04:29:29,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:29:29,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:29:29,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:29:29,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:29:29,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:29:29,217 INFO L87 Difference]: Start difference. First operand 1843 states and 2624 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:29:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:29:32,137 INFO L93 Difference]: Finished difference Result 5615 states and 8140 transitions. [2023-04-01 04:29:32,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:29:32,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2023-04-01 04:29:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:29:32,150 INFO L225 Difference]: With dead ends: 5615 [2023-04-01 04:29:32,150 INFO L226 Difference]: Without dead ends: 3777 [2023-04-01 04:29:32,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:29:32,154 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1572 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:29:32,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1572 Valid, 59 Invalid, 3460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-01 04:29:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2023-04-01 04:29:32,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3658. [2023-04-01 04:29:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 3573 states have (on average 1.2549678141617688) internal successors, (4484), 3601 states have internal predecessors, (4484), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 37 states have call predecessors, (195), 18 states have call successors, (195) [2023-04-01 04:29:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 4698 transitions. [2023-04-01 04:29:32,224 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 4698 transitions. Word has length 32 [2023-04-01 04:29:32,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:29:32,224 INFO L495 AbstractCegarLoop]: Abstraction has 3658 states and 4698 transitions. [2023-04-01 04:29:32,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:29:32,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 4698 transitions. [2023-04-01 04:29:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 04:29:32,232 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:29:32,232 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:29:32,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:29:32,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:29:32,440 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:29:32,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:29:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash 595375200, now seen corresponding path program 1 times [2023-04-01 04:29:32,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:29:32,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843357606] [2023-04-01 04:29:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:32,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:29:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:29:32,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:29:32,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843357606] [2023-04-01 04:29:32,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843357606] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:29:32,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060292511] [2023-04-01 04:29:32,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:29:32,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:29:32,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:29:32,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:29:32,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:29:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:29:32,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:29:32,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:29:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:29:32,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:29:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:29:32,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060292511] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:29:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [130184604] [2023-04-01 04:29:32,770 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-04-01 04:29:32,770 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:29:32,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:29:32,776 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:29:32,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:29:32,877 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-01 04:29:33,134 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 59