/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_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 19:25:04,414 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 19:25:04,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 19:25:04,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 19:25:04,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 19:25:04,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 19:25:04,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 19:25:04,456 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 19:25:04,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 19:25:04,460 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 19:25:04,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 19:25:04,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 19:25:04,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 19:25:04,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 19:25:04,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 19:25:04,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 19:25:04,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 19:25:04,467 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 19:25:04,469 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 19:25:04,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 19:25:04,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 19:25:04,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 19:25:04,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 19:25:04,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 19:25:04,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 19:25:04,482 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 19:25:04,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 19:25:04,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 19:25:04,483 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 19:25:04,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 19:25:04,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 19:25:04,484 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 19:25:04,485 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 19:25:04,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 19:25:04,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 19:25:04,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 19:25:04,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 19:25:04,487 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 19:25:04,487 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 19:25:04,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 19:25:04,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 19:25:04,488 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 [2023-04-02 19:25:04,510 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 19:25:04,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 19:25:04,511 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 19:25:04,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 19:25:04,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 19:25:04,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 19:25:04,512 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 19:25:04,512 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 19:25:04,512 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 19:25:04,512 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 19:25:04,513 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 19:25:04,513 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 19:25:04,513 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 19:25:04,513 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 19:25:04,513 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 19:25:04,513 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 19:25:04,513 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 19:25:04,513 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 19:25:04,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 19:25:04,514 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 19:25:04,514 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 19:25:04,514 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 19:25:04,514 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 19:25:04,514 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 19:25:04,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 19:25:04,515 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 19:25:04,515 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 19:25:04,515 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 19:25:04,515 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 19:25:04,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 19:25:04,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 19:25:04,515 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 19:25:04,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:25:04,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 19:25:04,516 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 19:25:04,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 19:25:04,516 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 19:25:04,516 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 19:25:04,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 19:25:04,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 19:25:04,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 19:25:04,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 19:25:04,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 19:25:04,723 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 19:25:04,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 19:25:04,725 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 19:25:04,726 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 19:25:04,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label57.c [2023-04-02 19:25:05,782 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 19:25:06,176 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 19:25:06,176 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label57.c [2023-04-02 19:25:06,193 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31aa6aade/e6f70281b9fe40dba7571aa3913c4899/FLAG3afec4aab [2023-04-02 19:25:06,207 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31aa6aade/e6f70281b9fe40dba7571aa3913c4899 [2023-04-02 19:25:06,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 19:25:06,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 19:25:06,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 19:25:06,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 19:25:06,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 19:25:06,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:25:06" (1/1) ... [2023-04-02 19:25:06,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7009c41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:25:06, skipping insertion in model container [2023-04-02 19:25:06,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 07:25:06" (1/1) ... [2023-04-02 19:25:06,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 19:25:06,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 19:25:06,479 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_label57.c[4795,4808] [2023-04-02 19:25:07,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:25:07,099 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 19:25:07,124 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_label57.c[4795,4808] [2023-04-02 19:25:07,430 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 19:25:07,450 INFO L208 MainTranslator]: Completed translation [2023-04-02 19:25:07,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:25:07 WrapperNode [2023-04-02 19:25:07,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 19:25:07,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 19:25:07,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 19:25:07,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 19:25:07,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:25:07" (1/1) ... [2023-04-02 19:25:07,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:25:07" (1/1) ... [2023-04-02 19:25:07,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:25:07" (1/1) ... [2023-04-02 19:25:07,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:25:07" (1/1) ... [2023-04-02 19:25:07,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:25:07" (1/1) ... [2023-04-02 19:25:07,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:25:07" (1/1) ... [2023-04-02 19:25:07,623 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:25:07" (1/1) ... [2023-04-02 19:25:07,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:25:07" (1/1) ... [2023-04-02 19:25:07,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 19:25:07,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 19:25:07,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 19:25:07,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 19:25:07,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:25:07" (1/1) ... [2023-04-02 19:25:07,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 19:25:07,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:25:07,692 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) [2023-04-02 19:25:07,713 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 [2023-04-02 19:25:07,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 19:25:07,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 19:25:07,738 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 19:25:07,738 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 19:25:07,739 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 19:25:07,739 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 19:25:07,739 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 19:25:07,739 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 19:25:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 19:25:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 19:25:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 19:25:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 19:25:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 19:25:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 19:25:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 19:25:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 19:25:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 19:25:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 19:25:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 19:25:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 19:25:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 19:25:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 19:25:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 19:25:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 19:25:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 19:25:07,902 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 19:25:07,905 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 19:25:10,828 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 19:25:11,292 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 19:25:11,292 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 19:25:11,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:25:11 BoogieIcfgContainer [2023-04-02 19:25:11,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 19:25:11,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 19:25:11,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 19:25:11,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 19:25:11,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 07:25:06" (1/3) ... [2023-04-02 19:25:11,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302b64ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:25:11, skipping insertion in model container [2023-04-02 19:25:11,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 07:25:07" (2/3) ... [2023-04-02 19:25:11,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302b64ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 07:25:11, skipping insertion in model container [2023-04-02 19:25:11,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 07:25:11" (3/3) ... [2023-04-02 19:25:11,303 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label57.c [2023-04-02 19:25:11,315 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 19:25:11,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 19:25:11,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 19:25:11,375 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;@4d941d63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 19:25:11,375 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 19:25:11,382 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) [2023-04-02 19:25:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 19:25:11,389 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:25:11,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:25:11,390 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:25:11,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:25:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash 636341505, now seen corresponding path program 1 times [2023-04-02 19:25:11,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:25:11,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638411224] [2023-04-02 19:25:11,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:25:11,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:25:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:25:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:25:11,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:25:11,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638411224] [2023-04-02 19:25:11,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638411224] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:25:11,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:25:11,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 19:25:11,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161383493] [2023-04-02 19:25:11,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:25:11,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 19:25:11,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:25:11,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 19:25:11,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 19:25:11,693 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) [2023-04-02 19:25:14,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:25:14,462 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-02 19:25:14,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 19:25:14,476 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 [2023-04-02 19:25:14,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:25:14,496 INFO L225 Difference]: With dead ends: 2068 [2023-04-02 19:25:14,496 INFO L226 Difference]: Without dead ends: 1371 [2023-04-02 19:25:14,509 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 [2023-04-02 19:25:14,512 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 846 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-02 19:25:14,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 217 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-02 19:25:14,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-02 19:25:14,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-02 19:25:14,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.857037037037037) internal successors, (2507), 1350 states have internal predecessors, (2507), 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) [2023-04-02 19:25:14,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2530 transitions. [2023-04-02 19:25:14,582 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2530 transitions. Word has length 11 [2023-04-02 19:25:14,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:25:14,583 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2530 transitions. [2023-04-02 19:25:14,583 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) [2023-04-02 19:25:14,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2530 transitions. [2023-04-02 19:25:14,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 19:25:14,584 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:25:14,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:25:14,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 19:25:14,585 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:25:14,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:25:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1851396028, now seen corresponding path program 1 times [2023-04-02 19:25:14,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:25:14,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133236931] [2023-04-02 19:25:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:25:14,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:25:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:25:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:25:14,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:25:14,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133236931] [2023-04-02 19:25:14,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133236931] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:25:14,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:25:14,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:25:14,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922680844] [2023-04-02 19:25:14,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:25:14,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:25:14,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:25:14,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:25:14,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:25:14,728 INFO L87 Difference]: Start difference. First operand 1368 states and 2530 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:25:17,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:25:17,728 INFO L93 Difference]: Finished difference Result 4138 states and 7702 transitions. [2023-04-02 19:25:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:25:17,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-04-02 19:25:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:25:17,756 INFO L225 Difference]: With dead ends: 4138 [2023-04-02 19:25:17,757 INFO L226 Difference]: Without dead ends: 2775 [2023-04-02 19:25:17,764 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 [2023-04-02 19:25:17,767 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2488 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3906 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 4816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 3906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 19:25:17,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2488 Valid, 118 Invalid, 4816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 3906 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 19:25:17,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2023-04-02 19:25:17,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2757. [2023-04-02 19:25:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2715 states have (on average 1.6976058931860036) internal successors, (4609), 2719 states have internal predecessors, (4609), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (77), 22 states have call predecessors, (77), 14 states have call successors, (77) [2023-04-02 19:25:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4701 transitions. [2023-04-02 19:25:17,842 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4701 transitions. Word has length 25 [2023-04-02 19:25:17,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:25:17,842 INFO L495 AbstractCegarLoop]: Abstraction has 2757 states and 4701 transitions. [2023-04-02 19:25:17,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 19:25:17,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4701 transitions. [2023-04-02 19:25:17,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-02 19:25:17,843 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:25:17,843 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] [2023-04-02 19:25:17,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 19:25:17,844 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:25:17,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:25:17,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1002196547, now seen corresponding path program 1 times [2023-04-02 19:25:17,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:25:17,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386364285] [2023-04-02 19:25:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:25:17,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:25:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:25:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:25:18,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:25:18,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386364285] [2023-04-02 19:25:18,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386364285] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 19:25:18,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 19:25:18,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 19:25:18,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610039965] [2023-04-02 19:25:18,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 19:25:18,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 19:25:18,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 19:25:18,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 19:25:18,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 19:25:18,023 INFO L87 Difference]: Start difference. First operand 2757 states and 4701 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) [2023-04-02 19:25:21,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 19:25:21,185 INFO L93 Difference]: Finished difference Result 7729 states and 13220 transitions. [2023-04-02 19:25:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 19:25:21,197 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 [2023-04-02 19:25:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 19:25:21,236 INFO L225 Difference]: With dead ends: 7729 [2023-04-02 19:25:21,236 INFO L226 Difference]: Without dead ends: 4977 [2023-04-02 19:25:21,259 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 [2023-04-02 19:25:21,263 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2452 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 1261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1261 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-02 19:25:21,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 95 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1261 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-02 19:25:21,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2023-04-02 19:25:21,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4896. [2023-04-02 19:25:21,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4789 states have (on average 1.579661724785968) internal successors, (7565), 4809 states have internal predecessors, (7565), 24 states have call successors, (24), 24 states have call predecessors, (24), 82 states have return successors, (335), 62 states have call predecessors, (335), 23 states have call successors, (335) [2023-04-02 19:25:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 7924 transitions. [2023-04-02 19:25:21,428 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 7924 transitions. Word has length 30 [2023-04-02 19:25:21,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 19:25:21,429 INFO L495 AbstractCegarLoop]: Abstraction has 4896 states and 7924 transitions. [2023-04-02 19:25:21,429 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) [2023-04-02 19:25:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 7924 transitions. [2023-04-02 19:25:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 19:25:21,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 19:25:21,430 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 19:25:21,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 19:25:21,431 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 19:25:21,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 19:25:21,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1772010451, now seen corresponding path program 1 times [2023-04-02 19:25:21,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 19:25:21,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238077470] [2023-04-02 19:25:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:25:21,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 19:25:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:25:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:25:21,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 19:25:21,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238077470] [2023-04-02 19:25:21,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238077470] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 19:25:21,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142278591] [2023-04-02 19:25:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 19:25:21,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 19:25:21,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 19:25:21,561 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) [2023-04-02 19:25:21,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 19:25:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 19:25:21,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 19:25:21,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 19:25:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:25:21,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 19:25:21,872 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 19:25:21,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142278591] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 19:25:21,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1985541908] [2023-04-02 19:25:21,889 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-02 19:25:21,890 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 19:25:21,892 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 19:25:21,896 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 19:25:21,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 19:25:22,028 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-02 19:25:22,153 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 31 [2023-04-02 19:25:23,396 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 62755 conjuctions. This might take some time... [2023-04-02 19:25:27,939 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 729 conjuctions. [2023-04-02 19:25:56,699 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30