/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/Problem12_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 03:59:19,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 03:59:19,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 03:59:19,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 03:59:19,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 03:59:19,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 03:59:19,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 03:59:19,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 03:59:19,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 03:59:19,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 03:59:19,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 03:59:19,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 03:59:19,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 03:59:19,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 03:59:19,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 03:59:19,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 03:59:19,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 03:59:19,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 03:59:19,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 03:59:19,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 03:59:19,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 03:59:19,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 03:59:19,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 03:59:19,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 03:59:19,371 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 03:59:19,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 03:59:19,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 03:59:19,372 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 03:59:19,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 03:59:19,373 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 03:59:19,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 03:59:19,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 03:59:19,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 03:59:19,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 03:59:19,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 03:59:19,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 03:59:19,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 03:59:19,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 03:59:19,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 03:59:19,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 03:59:19,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 03:59:19,377 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 03:59:19,402 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 03:59:19,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 03:59:19,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 03:59:19,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 03:59:19,404 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 03:59:19,404 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 03:59:19,404 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 03:59:19,405 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 03:59:19,405 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 03:59:19,405 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 03:59:19,405 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 03:59:19,406 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 03:59:19,406 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 03:59:19,406 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 03:59:19,406 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 03:59:19,406 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 03:59:19,406 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 03:59:19,406 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 03:59:19,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 03:59:19,407 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 03:59:19,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 03:59:19,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 03:59:19,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 03:59:19,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 03:59:19,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 03:59:19,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 03:59:19,407 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 03:59:19,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 03:59:19,408 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 03:59:19,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 03:59:19,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 03:59:19,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 03:59:19,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:59:19,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 03:59:19,408 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 03:59:19,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 03:59:19,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 03:59:19,409 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 03:59:19,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 03:59:19,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 03:59:19,409 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 03:59:19,409 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 03:59:19,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 03:59:19,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 03:59:19,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 03:59:19,643 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 03:59:19,643 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 03:59:19,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label00.c [2023-04-01 03:59:20,701 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 03:59:20,987 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 03:59:20,987 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label00.c [2023-04-01 03:59:21,004 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70f4534fd/18c8f55cfad14837b3fc48e90056e44a/FLAG378702aab [2023-04-01 03:59:21,019 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70f4534fd/18c8f55cfad14837b3fc48e90056e44a [2023-04-01 03:59:21,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 03:59:21,022 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 03:59:21,024 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 03:59:21,024 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 03:59:21,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 03:59:21,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:59:21" (1/1) ... [2023-04-01 03:59:21,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d0df60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:59:21, skipping insertion in model container [2023-04-01 03:59:21,028 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 03:59:21" (1/1) ... [2023-04-01 03:59:21,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 03:59:21,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 03:59:21,324 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_label00.c[2236,2249] [2023-04-01 03:59:21,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:59:21,996 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 03:59:22,016 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_label00.c[2236,2249] [2023-04-01 03:59:22,302 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 03:59:22,319 INFO L208 MainTranslator]: Completed translation [2023-04-01 03:59:22,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:59:22 WrapperNode [2023-04-01 03:59:22,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 03:59:22,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 03:59:22,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 03:59:22,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 03:59:22,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:59:22" (1/1) ... [2023-04-01 03:59:22,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:59:22" (1/1) ... [2023-04-01 03:59:22,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:59:22" (1/1) ... [2023-04-01 03:59:22,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:59:22" (1/1) ... [2023-04-01 03:59:22,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:59:22" (1/1) ... [2023-04-01 03:59:22,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:59:22" (1/1) ... [2023-04-01 03:59:22,517 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:59:22" (1/1) ... [2023-04-01 03:59:22,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:59:22" (1/1) ... [2023-04-01 03:59:22,551 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 03:59:22,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 03:59:22,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 03:59:22,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 03:59:22,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:59:22" (1/1) ... [2023-04-01 03:59:22,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 03:59:22,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:59:22,596 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 03:59:22,620 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 03:59:22,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 03:59:22,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 03:59:22,645 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 03:59:22,648 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 03:59:22,648 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 03:59:22,648 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 03:59:22,648 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 03:59:22,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 03:59:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 03:59:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 03:59:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 03:59:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 03:59:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 03:59:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 03:59:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 03:59:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 03:59:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 03:59:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 03:59:22,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 03:59:22,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 03:59:22,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 03:59:22,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 03:59:22,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 03:59:22,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 03:59:22,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 03:59:22,779 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 03:59:22,781 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 03:59:25,716 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 03:59:26,228 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 03:59:26,228 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 03:59:26,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:59:26 BoogieIcfgContainer [2023-04-01 03:59:26,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 03:59:26,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 03:59:26,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 03:59:26,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 03:59:26,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 03:59:21" (1/3) ... [2023-04-01 03:59:26,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9434c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:59:26, skipping insertion in model container [2023-04-01 03:59:26,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 03:59:22" (2/3) ... [2023-04-01 03:59:26,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b9434c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 03:59:26, skipping insertion in model container [2023-04-01 03:59:26,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 03:59:26" (3/3) ... [2023-04-01 03:59:26,236 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label00.c [2023-04-01 03:59:26,249 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 03:59:26,249 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 03:59:26,286 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 03:59:26,291 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;@4b9c0fd9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 03:59:26,291 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 03:59:26,296 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) [2023-04-01 03:59:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 03:59:26,300 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:59:26,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:59:26,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:59:26,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:59:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash 832849378, now seen corresponding path program 1 times [2023-04-01 03:59:26,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:59:26,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217893763] [2023-04-01 03:59:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:59:26,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:59:26,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:59:26,631 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 03:59:26,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:59:26,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217893763] [2023-04-01 03:59:26,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217893763] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:59:26,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:59:26,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 03:59:26,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650394540] [2023-04-01 03:59:26,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:59:26,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 03:59:26,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:59:26,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 03:59:26,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 03:59:26,665 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) [2023-04-01 03:59:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:59:29,161 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 03:59:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 03:59:29,163 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 03:59:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:59:29,186 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 03:59:29,186 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 03:59:29,194 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 03:59:29,197 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 705 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 1079 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 3152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1079 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 03:59:29,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 86 Invalid, 3152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1079 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 03:59:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 03:59:29,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 03:59:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.954074074074074) internal successors, (2638), 1350 states have internal predecessors, (2638), 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) [2023-04-01 03:59:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2661 transitions. [2023-04-01 03:59:29,338 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2661 transitions. Word has length 11 [2023-04-01 03:59:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:59:29,338 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2661 transitions. [2023-04-01 03:59:29,338 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 03:59:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2661 transitions. [2023-04-01 03:59:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 03:59:29,340 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:59:29,340 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] [2023-04-01 03:59:29,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 03:59:29,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:59:29,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:59:29,353 INFO L85 PathProgramCache]: Analyzing trace with hash -859892312, now seen corresponding path program 1 times [2023-04-01 03:59:29,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:59:29,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311406134] [2023-04-01 03:59:29,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:59:29,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:59:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:59:29,576 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 03:59:29,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:59:29,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311406134] [2023-04-01 03:59:29,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311406134] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:59:29,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:59:29,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:59:29,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536211729] [2023-04-01 03:59:29,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:59:29,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:59:29,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:59:29,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:59:29,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:59:29,580 INFO L87 Difference]: Start difference. First operand 1368 states and 2661 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 03:59:32,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:59:32,908 INFO L93 Difference]: Finished difference Result 4148 states and 8082 transitions. [2023-04-01 03:59:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 03:59:32,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 32 [2023-04-01 03:59:32,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:59:32,924 INFO L225 Difference]: With dead ends: 4148 [2023-04-01 03:59:32,924 INFO L226 Difference]: Without dead ends: 2785 [2023-04-01 03:59:32,929 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 [2023-04-01 03:59:32,930 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2779 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 3735 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2779 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 4405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 3735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 03:59:32,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2779 Valid, 88 Invalid, 4405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 3735 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 03:59:32,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-04-01 03:59:32,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2755. [2023-04-01 03:59:32,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2713 states have (on average 1.7143383708072244) internal successors, (4651), 2717 states have internal predecessors, (4651), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-04-01 03:59:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4728 transitions. [2023-04-01 03:59:32,996 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4728 transitions. Word has length 32 [2023-04-01 03:59:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:59:32,996 INFO L495 AbstractCegarLoop]: Abstraction has 2755 states and 4728 transitions. [2023-04-01 03:59:32,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 03:59:32,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4728 transitions. [2023-04-01 03:59:32,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 03:59:32,998 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:59:32,998 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] [2023-04-01 03:59:32,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 03:59:32,998 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:59:32,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:59:32,999 INFO L85 PathProgramCache]: Analyzing trace with hash -192544035, now seen corresponding path program 1 times [2023-04-01 03:59:32,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:59:32,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542413241] [2023-04-01 03:59:32,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:59:32,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:59:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:59:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:59:33,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:59:33,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542413241] [2023-04-01 03:59:33,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542413241] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:59:33,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912935319] [2023-04-01 03:59:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:59:33,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:59:33,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:59:33,111 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 03:59:33,144 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 03:59:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:59:33,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:59:33,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:59:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 03:59:33,266 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:59:33,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912935319] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:59:33,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:59:33,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 03:59:33,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727534931] [2023-04-01 03:59:33,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:59:33,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:59:33,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:59:33,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:59:33,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:59:33,268 INFO L87 Difference]: Start difference. First operand 2755 states and 4728 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 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 03:59:36,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:59:36,736 INFO L93 Difference]: Finished difference Result 7041 states and 12134 transitions. [2023-04-01 03:59:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:59:36,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 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 46 [2023-04-01 03:59:36,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:59:36,752 INFO L225 Difference]: With dead ends: 7041 [2023-04-01 03:59:36,752 INFO L226 Difference]: Without dead ends: 4291 [2023-04-01 03:59:36,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 03:59:36,761 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 2314 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 4274 mSolverCounterSat, 938 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 5212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 938 IncrementalHoareTripleChecker+Valid, 4274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:59:36,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2314 Valid, 99 Invalid, 5212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [938 Valid, 4274 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 03:59:36,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2023-04-01 03:59:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 4223. [2023-04-01 03:59:36,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4223 states, 4127 states have (on average 1.572570874727405) internal successors, (6490), 4145 states have internal predecessors, (6490), 21 states have call successors, (21), 21 states have call predecessors, (21), 74 states have return successors, (227), 56 states have call predecessors, (227), 20 states have call successors, (227) [2023-04-01 03:59:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4223 states to 4223 states and 6738 transitions. [2023-04-01 03:59:36,880 INFO L78 Accepts]: Start accepts. Automaton has 4223 states and 6738 transitions. Word has length 46 [2023-04-01 03:59:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:59:36,881 INFO L495 AbstractCegarLoop]: Abstraction has 4223 states and 6738 transitions. [2023-04-01 03:59:36,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 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 03:59:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 4223 states and 6738 transitions. [2023-04-01 03:59:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 03:59:36,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:59:36,888 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:59:36,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 03:59:37,093 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 03:59:37,094 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:59:37,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:59:37,094 INFO L85 PathProgramCache]: Analyzing trace with hash -677422274, now seen corresponding path program 1 times [2023-04-01 03:59:37,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:59:37,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383912157] [2023-04-01 03:59:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:59:37,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:59:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:59:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 03:59:37,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:59:37,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383912157] [2023-04-01 03:59:37,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383912157] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:59:37,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036625381] [2023-04-01 03:59:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:59:37,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:59:37,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:59:37,275 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 03:59:37,277 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 03:59:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:59:37,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 03:59:37,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:59:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 03:59:37,430 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 03:59:37,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036625381] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:59:37,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 03:59:37,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 03:59:37,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656634905] [2023-04-01 03:59:37,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:59:37,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:59:37,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:59:37,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:59:37,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 03:59:37,431 INFO L87 Difference]: Start difference. First operand 4223 states and 6738 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 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 03:59:40,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:59:40,443 INFO L93 Difference]: Finished difference Result 12959 states and 21727 transitions. [2023-04-01 03:59:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:59:40,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 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 51 [2023-04-01 03:59:40,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:59:40,506 INFO L225 Difference]: With dead ends: 12959 [2023-04-01 03:59:40,507 INFO L226 Difference]: Without dead ends: 8741 [2023-04-01 03:59:40,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 03:59:40,522 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2175 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3775 mSolverCounterSat, 1631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2175 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 5406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1631 IncrementalHoareTripleChecker+Valid, 3775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 03:59:40,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2175 Valid, 83 Invalid, 5406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1631 Valid, 3775 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 03:59:40,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8741 states. [2023-04-01 03:59:40,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8741 to 8438. [2023-04-01 03:59:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8438 states, 8193 states have (on average 1.5386305382643721) internal successors, (12606), 8255 states have internal predecessors, (12606), 39 states have call successors, (39), 39 states have call predecessors, (39), 205 states have return successors, (1075), 143 states have call predecessors, (1075), 38 states have call successors, (1075) [2023-04-01 03:59:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8438 states to 8438 states and 13720 transitions. [2023-04-01 03:59:40,840 INFO L78 Accepts]: Start accepts. Automaton has 8438 states and 13720 transitions. Word has length 51 [2023-04-01 03:59:40,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:59:40,840 INFO L495 AbstractCegarLoop]: Abstraction has 8438 states and 13720 transitions. [2023-04-01 03:59:40,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 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 03:59:40,841 INFO L276 IsEmpty]: Start isEmpty. Operand 8438 states and 13720 transitions. [2023-04-01 03:59:40,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-04-01 03:59:40,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:59:40,847 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:59:40,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 03:59:41,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 03:59:41,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:59:41,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:59:41,055 INFO L85 PathProgramCache]: Analyzing trace with hash 43848177, now seen corresponding path program 1 times [2023-04-01 03:59:41,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:59:41,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998489786] [2023-04-01 03:59:41,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:59:41,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:59:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:59:41,176 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 03:59:41,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:59:41,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998489786] [2023-04-01 03:59:41,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998489786] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:59:41,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:59:41,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:59:41,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990203283] [2023-04-01 03:59:41,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:59:41,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:59:41,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:59:41,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:59:41,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:59:41,179 INFO L87 Difference]: Start difference. First operand 8438 states and 13720 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 03:59:44,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:59:44,587 INFO L93 Difference]: Finished difference Result 25907 states and 45435 transitions. [2023-04-01 03:59:44,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 03:59:44,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 55 [2023-04-01 03:59:44,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:59:44,654 INFO L225 Difference]: With dead ends: 25907 [2023-04-01 03:59:44,654 INFO L226 Difference]: Without dead ends: 17474 [2023-04-01 03:59:44,670 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 03:59:44,670 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2133 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4381 mSolverCounterSat, 1079 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2133 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1079 IncrementalHoareTripleChecker+Valid, 4381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 03:59:44,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2133 Valid, 134 Invalid, 5460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1079 Valid, 4381 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 03:59:44,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17474 states. [2023-04-01 03:59:44,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17474 to 15210. [2023-04-01 03:59:44,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15210 states, 14635 states have (on average 1.3758114110010249) internal successors, (20135), 14809 states have internal predecessors, (20135), 71 states have call successors, (71), 71 states have call predecessors, (71), 503 states have return successors, (3356), 329 states have call predecessors, (3356), 70 states have call successors, (3356) [2023-04-01 03:59:45,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15210 states to 15210 states and 23562 transitions. [2023-04-01 03:59:45,011 INFO L78 Accepts]: Start accepts. Automaton has 15210 states and 23562 transitions. Word has length 55 [2023-04-01 03:59:45,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:59:45,011 INFO L495 AbstractCegarLoop]: Abstraction has 15210 states and 23562 transitions. [2023-04-01 03:59:45,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 4 states have internal predecessors, (49), 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 03:59:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 15210 states and 23562 transitions. [2023-04-01 03:59:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 03:59:45,013 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:59:45,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:59:45,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 03:59:45,014 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:59:45,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:59:45,014 INFO L85 PathProgramCache]: Analyzing trace with hash 835697853, now seen corresponding path program 1 times [2023-04-01 03:59:45,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:59:45,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126421141] [2023-04-01 03:59:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:59:45,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:59:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:59:45,141 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 03:59:45,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:59:45,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126421141] [2023-04-01 03:59:45,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126421141] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 03:59:45,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 03:59:45,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 03:59:45,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935871106] [2023-04-01 03:59:45,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 03:59:45,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 03:59:45,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 03:59:45,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 03:59:45,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 03:59:45,145 INFO L87 Difference]: Start difference. First operand 15210 states and 23562 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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 03:59:48,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 03:59:48,862 INFO L93 Difference]: Finished difference Result 44011 states and 74814 transitions. [2023-04-01 03:59:48,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 03:59:48,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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 65 [2023-04-01 03:59:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 03:59:48,997 INFO L225 Difference]: With dead ends: 44011 [2023-04-01 03:59:48,997 INFO L226 Difference]: Without dead ends: 28806 [2023-04-01 03:59:49,034 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 03:59:49,035 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2386 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3823 mSolverCounterSat, 1265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2386 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 5088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1265 IncrementalHoareTripleChecker+Valid, 3823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 03:59:49,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2386 Valid, 101 Invalid, 5088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1265 Valid, 3823 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 03:59:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28806 states. [2023-04-01 03:59:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28806 to 28379. [2023-04-01 03:59:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28379 states, 27545 states have (on average 1.3458340896714467) internal successors, (37071), 27786 states have internal predecessors, (37071), 132 states have call successors, (132), 132 states have call predecessors, (132), 701 states have return successors, (7505), 460 states have call predecessors, (7505), 131 states have call successors, (7505) [2023-04-01 03:59:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28379 states to 28379 states and 44708 transitions. [2023-04-01 03:59:49,724 INFO L78 Accepts]: Start accepts. Automaton has 28379 states and 44708 transitions. Word has length 65 [2023-04-01 03:59:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 03:59:49,725 INFO L495 AbstractCegarLoop]: Abstraction has 28379 states and 44708 transitions. [2023-04-01 03:59:49,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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 03:59:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 28379 states and 44708 transitions. [2023-04-01 03:59:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-04-01 03:59:49,726 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 03:59:49,726 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 03:59:49,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 03:59:49,726 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 03:59:49,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 03:59:49,727 INFO L85 PathProgramCache]: Analyzing trace with hash 385399273, now seen corresponding path program 1 times [2023-04-01 03:59:49,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 03:59:49,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026571967] [2023-04-01 03:59:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:59:49,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 03:59:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:59:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:59:49,863 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 03:59:49,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026571967] [2023-04-01 03:59:49,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026571967] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 03:59:49,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037045259] [2023-04-01 03:59:49,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 03:59:49,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 03:59:49,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 03:59:49,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 03:59:49,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 03:59:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 03:59:49,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 03:59:49,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 03:59:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:59:50,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 03:59:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 03:59:50,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037045259] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 03:59:50,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [396665931] [2023-04-01 03:59:50,298 INFO L159 IcfgInterpreter]: Started Sifa with 72 locations of interest [2023-04-01 03:59:50,299 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 03:59:50,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 03:59:50,304 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 03:59:50,304 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 03:59:50,417 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 03:59:50,509 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 04:00:12,512 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 52