/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:02:53,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:02:53,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:02:53,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:02:53,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:02:53,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:02:53,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:02:53,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:02:53,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:02:53,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:02:53,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:02:53,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:02:53,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:02:53,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:02:53,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:02:53,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:02:53,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:02:53,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:02:53,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:02:53,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:02:53,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:02:53,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:02:53,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:02:53,426 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:02:53,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:02:53,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:02:53,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:02:53,439 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:02:53,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:02:53,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:02:53,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:02:53,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:02:53,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:02:53,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:02:53,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:02:53,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:02:53,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:02:53,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:02:53,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:02:53,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:02:53,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:02:53,446 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 10:02:53,480 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:02:53,480 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:02:53,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:02:53,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:02:53,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:02:53,482 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:02:53,482 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:02:53,482 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:02:53,482 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:02:53,483 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:02:53,483 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:02:53,483 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:02:53,484 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:02:53,484 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:02:53,484 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:02:53,484 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:02:53,484 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:02:53,484 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:02:53,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:02:53,485 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:02:53,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:02:53,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:02:53,485 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:02:53,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:02:53,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:02:53,486 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:02:53,486 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:02:53,486 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:02:53,486 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:02:53,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:02:53,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:02:53,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:02:53,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:02:53,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:02:53,489 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:02:53,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:02:53,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:02:53,489 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:02:53,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:02:53,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:02:53,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:02:53,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:02:53,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:02:53,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:02:53,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:02:53,743 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:02:53,744 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:02:53,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label09.c [2023-04-01 10:02:54,834 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:02:55,309 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:02:55,310 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label09.c [2023-04-01 10:02:55,337 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db5409568/4345dc389e8c41f996884317f90de016/FLAG1ecd44a26 [2023-04-01 10:02:55,353 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db5409568/4345dc389e8c41f996884317f90de016 [2023-04-01 10:02:55,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:02:55,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:02:55,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:02:55,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:02:55,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:02:55,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:02:55" (1/1) ... [2023-04-01 10:02:55,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c240290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:55, skipping insertion in model container [2023-04-01 10:02:55,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:02:55" (1/1) ... [2023-04-01 10:02:55,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:02:55,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:02:55,735 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_label09.c[8109,8122] [2023-04-01 10:02:56,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:02:56,432 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:02:56,463 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_label09.c[8109,8122] [2023-04-01 10:02:56,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:02:56,865 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:02:56,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:56 WrapperNode [2023-04-01 10:02:56,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:02:56,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:02:56,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:02:56,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:02:56,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:56" (1/1) ... [2023-04-01 10:02:56,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:56" (1/1) ... [2023-04-01 10:02:56,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:56" (1/1) ... [2023-04-01 10:02:56,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:56" (1/1) ... [2023-04-01 10:02:57,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:56" (1/1) ... [2023-04-01 10:02:57,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:56" (1/1) ... [2023-04-01 10:02:57,038 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:56" (1/1) ... [2023-04-01 10:02:57,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:56" (1/1) ... [2023-04-01 10:02:57,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:02:57,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:02:57,078 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:02:57,078 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:02:57,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:56" (1/1) ... [2023-04-01 10:02:57,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:02:57,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:02:57,109 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 10:02:57,122 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 10:02:57,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:02:57,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:02:57,144 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:02:57,144 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:02:57,144 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:02:57,145 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:02:57,145 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:02:57,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:02:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:02:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:02:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:02:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:02:57,145 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:02:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:02:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:02:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:02:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:02:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:02:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:02:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:02:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:02:57,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:02:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:02:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:02:57,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:02:57,211 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:02:57,213 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:03:00,950 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:03:01,547 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:03:01,547 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:03:01,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:03:01 BoogieIcfgContainer [2023-04-01 10:03:01,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:03:01,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:03:01,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:03:01,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:03:01,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:02:55" (1/3) ... [2023-04-01 10:03:01,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf39092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:03:01, skipping insertion in model container [2023-04-01 10:03:01,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:56" (2/3) ... [2023-04-01 10:03:01,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cf39092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:03:01, skipping insertion in model container [2023-04-01 10:03:01,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:03:01" (3/3) ... [2023-04-01 10:03:01,560 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label09.c [2023-04-01 10:03:01,575 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:03:01,576 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:03:01,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:03:01,653 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;@8f194bb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:03:01,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:03:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 693 states, 679 states have (on average 1.9779086892488955) internal successors, (1343), 680 states have internal predecessors, (1343), 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 10:03:01,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:03:01,671 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:03:01,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:03:01,672 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:03:01,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:03:01,678 INFO L85 PathProgramCache]: Analyzing trace with hash 832866278, now seen corresponding path program 1 times [2023-04-01 10:03:01,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:03:01,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240047470] [2023-04-01 10:03:01,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:01,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:03:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:02,020 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 10:03:02,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:03:02,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240047470] [2023-04-01 10:03:02,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240047470] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:03:02,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:03:02,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:03:02,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064748790] [2023-04-01 10:03:02,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:03:02,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:03:02,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:03:02,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:03:02,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:03:02,068 INFO L87 Difference]: Start difference. First operand has 693 states, 679 states have (on average 1.9779086892488955) internal successors, (1343), 680 states have internal predecessors, (1343), 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 10:03:05,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:03:05,307 INFO L93 Difference]: Finished difference Result 2065 states and 4062 transitions. [2023-04-01 10:03:05,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:03:05,310 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 10:03:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:03:05,335 INFO L225 Difference]: With dead ends: 2065 [2023-04-01 10:03:05,335 INFO L226 Difference]: Without dead ends: 1369 [2023-04-01 10:03:05,347 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 10:03:05,350 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 724 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 2703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:03:05,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 498 Invalid, 2703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2071 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 10:03:05,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2023-04-01 10:03:05,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1366. [2023-04-01 10:03:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1348 states have (on average 1.6520771513353116) internal successors, (2227), 1348 states have internal predecessors, (2227), 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 10:03:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 2250 transitions. [2023-04-01 10:03:05,489 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 2250 transitions. Word has length 11 [2023-04-01 10:03:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:03:05,490 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 2250 transitions. [2023-04-01 10:03:05,490 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 10:03:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 2250 transitions. [2023-04-01 10:03:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 10:03:05,492 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:03:05,492 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] [2023-04-01 10:03:05,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:03:05,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:03:05,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:03:05,493 INFO L85 PathProgramCache]: Analyzing trace with hash 868638377, now seen corresponding path program 1 times [2023-04-01 10:03:05,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:03:05,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003341307] [2023-04-01 10:03:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:05,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:03:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:05,688 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 10:03:05,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:03:05,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003341307] [2023-04-01 10:03:05,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003341307] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:03:05,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:03:05,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:03:05,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881456429] [2023-04-01 10:03:05,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:03:05,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:03:05,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:03:05,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:03:05,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:03:05,692 INFO L87 Difference]: Start difference. First operand 1366 states and 2250 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 10:03:10,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:03:10,063 INFO L93 Difference]: Finished difference Result 4142 states and 6849 transitions. [2023-04-01 10:03:10,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:03:10,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 30 [2023-04-01 10:03:10,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:03:10,079 INFO L225 Difference]: With dead ends: 4142 [2023-04-01 10:03:10,080 INFO L226 Difference]: Without dead ends: 2781 [2023-04-01 10:03:10,089 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 10:03:10,092 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2644 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4198 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2644 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:03:10,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2644 Valid, 89 Invalid, 4868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4198 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 10:03:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2023-04-01 10:03:10,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2752. [2023-04-01 10:03:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2710 states have (on average 1.4904059040590405) internal successors, (4039), 2714 states have internal predecessors, (4039), 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 10:03:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 4116 transitions. [2023-04-01 10:03:10,207 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 4116 transitions. Word has length 30 [2023-04-01 10:03:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:03:10,207 INFO L495 AbstractCegarLoop]: Abstraction has 2752 states and 4116 transitions. [2023-04-01 10:03:10,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 10:03:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 4116 transitions. [2023-04-01 10:03:10,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 10:03:10,209 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:03:10,209 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] [2023-04-01 10:03:10,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:03:10,210 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:03:10,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:03:10,210 INFO L85 PathProgramCache]: Analyzing trace with hash -657697104, now seen corresponding path program 1 times [2023-04-01 10:03:10,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:03:10,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697518875] [2023-04-01 10:03:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:10,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:03:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:10,491 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 10:03:10,491 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:03:10,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697518875] [2023-04-01 10:03:10,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697518875] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:03:10,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:03:10,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:03:10,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40957881] [2023-04-01 10:03:10,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:03:10,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:03:10,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:03:10,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:03:10,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:03:10,494 INFO L87 Difference]: Start difference. First operand 2752 states and 4116 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 10:03:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:03:14,408 INFO L93 Difference]: Finished difference Result 8405 states and 12801 transitions. [2023-04-01 10:03:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:03:14,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 59 [2023-04-01 10:03:14,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:03:14,433 INFO L225 Difference]: With dead ends: 8405 [2023-04-01 10:03:14,433 INFO L226 Difference]: Without dead ends: 5658 [2023-04-01 10:03:14,439 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 10:03:14,439 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2401 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3757 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2401 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 3757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:03:14,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2401 Valid, 100 Invalid, 5042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 3757 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 10:03:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5658 states. [2023-04-01 10:03:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5658 to 5596. [2023-04-01 10:03:14,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5596 states, 5478 states have (on average 1.4286235852500913) internal successors, (7826), 5501 states have internal predecessors, (7826), 28 states have call successors, (28), 28 states have call predecessors, (28), 89 states have return successors, (297), 66 states have call predecessors, (297), 27 states have call successors, (297) [2023-04-01 10:03:14,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5596 states to 5596 states and 8151 transitions. [2023-04-01 10:03:14,583 INFO L78 Accepts]: Start accepts. Automaton has 5596 states and 8151 transitions. Word has length 59 [2023-04-01 10:03:14,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:03:14,584 INFO L495 AbstractCegarLoop]: Abstraction has 5596 states and 8151 transitions. [2023-04-01 10:03:14,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 10:03:14,584 INFO L276 IsEmpty]: Start isEmpty. Operand 5596 states and 8151 transitions. [2023-04-01 10:03:14,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-04-01 10:03:14,592 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:03:14,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:03:14,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:03:14,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:03:14,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:03:14,595 INFO L85 PathProgramCache]: Analyzing trace with hash -948748173, now seen corresponding path program 1 times [2023-04-01 10:03:14,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:03:14,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467045881] [2023-04-01 10:03:14,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:14,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:03:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:14,888 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 10:03:14,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:03:14,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467045881] [2023-04-01 10:03:14,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467045881] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:03:14,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441306433] [2023-04-01 10:03:14,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:14,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:03:14,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:03:14,892 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 10:03:14,893 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 10:03:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:15,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:03:15,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:03:15,128 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 10:03:15,128 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:03:15,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441306433] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:03:15,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:03:15,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:03:15,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832638528] [2023-04-01 10:03:15,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:03:15,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:03:15,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:03:15,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:03:15,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:03:15,130 INFO L87 Difference]: Start difference. First operand 5596 states and 8151 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 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 10:03:19,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:03:19,070 INFO L93 Difference]: Finished difference Result 16979 states and 25432 transitions. [2023-04-01 10:03:19,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:03:19,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 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 72 [2023-04-01 10:03:19,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:03:19,127 INFO L225 Difference]: With dead ends: 16979 [2023-04-01 10:03:19,127 INFO L226 Difference]: Without dead ends: 11388 [2023-04-01 10:03:19,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 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 10:03:19,145 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2204 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4590 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2204 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 5571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 4590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:03:19,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2204 Valid, 93 Invalid, 5571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 4590 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 10:03:19,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11388 states. [2023-04-01 10:03:19,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11388 to 11300. [2023-04-01 10:03:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11300 states, 11015 states have (on average 1.3054925102133454) internal successors, (14380), 11083 states have internal predecessors, (14380), 52 states have call successors, (52), 52 states have call predecessors, (52), 232 states have return successors, (1084), 164 states have call predecessors, (1084), 51 states have call successors, (1084) [2023-04-01 10:03:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11300 states to 11300 states and 15516 transitions. [2023-04-01 10:03:19,477 INFO L78 Accepts]: Start accepts. Automaton has 11300 states and 15516 transitions. Word has length 72 [2023-04-01 10:03:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:03:19,478 INFO L495 AbstractCegarLoop]: Abstraction has 11300 states and 15516 transitions. [2023-04-01 10:03:19,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 4 states have internal predecessors, (60), 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 10:03:19,479 INFO L276 IsEmpty]: Start isEmpty. Operand 11300 states and 15516 transitions. [2023-04-01 10:03:19,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-04-01 10:03:19,481 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:03:19,481 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:03:19,491 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 10:03:19,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:03:19,692 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:03:19,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:03:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash -711281080, now seen corresponding path program 1 times [2023-04-01 10:03:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:03:19,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569084506] [2023-04-01 10:03:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:19,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:03:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 10:03:19,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:03:19,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569084506] [2023-04-01 10:03:19,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569084506] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:03:19,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704566296] [2023-04-01 10:03:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:19,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:03:19,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:03:19,948 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 10:03:19,957 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 10:03:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:20,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:03:20,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:03:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:03:20,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:03:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 19 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-01 10:03:20,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704566296] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:03:20,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [452690252] [2023-04-01 10:03:20,444 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2023-04-01 10:03:20,445 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:03:20,448 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:03:20,452 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:03:20,453 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:03:20,798 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 84 for LOIs [2023-04-01 10:03:21,232 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 60