/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/Problem15_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:17:46,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:17:46,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:17:46,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:17:46,555 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:17:46,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:17:46,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:17:46,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:17:46,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:17:46,569 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:17:46,571 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:17:46,572 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:17:46,573 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:17:46,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:17:46,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:17:46,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:17:46,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:17:46,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:17:46,583 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:17:46,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:17:46,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:17:46,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:17:46,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:17:46,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:17:46,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:17:46,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:17:46,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:17:46,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:17:46,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:17:46,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:17:46,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:17:46,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:17:46,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:17:46,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:17:46,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:17:46,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:17:46,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:17:46,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:17:46,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:17:46,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:17:46,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:17:46,611 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 10:17:46,639 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:17:46,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:17:46,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:17:46,640 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:17:46,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:17:46,641 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:17:46,641 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:17:46,641 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:17:46,641 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:17:46,641 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:17:46,642 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:17:46,642 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:17:46,642 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:17:46,642 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:17:46,643 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:17:46,643 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:17:46,643 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:17:46,643 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:17:46,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:17:46,644 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:17:46,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:17:46,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:17:46,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:17:46,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:17:46,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:17:46,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:17:46,645 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:17:46,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:17:46,645 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:17:46,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:17:46,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:17:46,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:17:46,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:17:46,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:17:46,647 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:17:46,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:17:46,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:17:46,647 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:17:46,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:17:46,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:17:46,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:17:46,648 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:17:46,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:17:46,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:17:46,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:17:46,908 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:17:46,908 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:17:46,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label39.c [2023-04-01 10:17:48,060 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:17:48,387 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:17:48,387 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label39.c [2023-04-01 10:17:48,405 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd5a794b/784c73d57f5f4fbbbe9e07bdf94cdb95/FLAGcf6cdbe4a [2023-04-01 10:17:48,420 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd5a794b/784c73d57f5f4fbbbe9e07bdf94cdb95 [2023-04-01 10:17:48,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:17:48,424 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:17:48,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:17:48,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:17:48,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:17:48,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:17:48" (1/1) ... [2023-04-01 10:17:48,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28800418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:48, skipping insertion in model container [2023-04-01 10:17:48,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:17:48" (1/1) ... [2023-04-01 10:17:48,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:17:48,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:17:48,721 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/Problem15_label39.c[1583,1596] [2023-04-01 10:17:49,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:17:49,163 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:17:49,186 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/Problem15_label39.c[1583,1596] [2023-04-01 10:17:49,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:17:49,436 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:17:49,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:49 WrapperNode [2023-04-01 10:17:49,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:17:49,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:17:49,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:17:49,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:17:49,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:49" (1/1) ... [2023-04-01 10:17:49,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:49" (1/1) ... [2023-04-01 10:17:49,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:49" (1/1) ... [2023-04-01 10:17:49,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:49" (1/1) ... [2023-04-01 10:17:49,541 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:49" (1/1) ... [2023-04-01 10:17:49,551 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:49" (1/1) ... [2023-04-01 10:17:49,575 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:49" (1/1) ... [2023-04-01 10:17:49,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:49" (1/1) ... [2023-04-01 10:17:49,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:17:49,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:17:49,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:17:49,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:17:49,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:49" (1/1) ... [2023-04-01 10:17:49,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:17:49,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:17:49,637 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 10:17:49,646 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 10:17:49,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:17:49,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:17:49,672 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:17:49,672 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:17:49,672 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:17:49,672 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:17:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:17:49,672 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:17:49,673 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:17:49,673 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:17:49,673 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:17:49,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:17:49,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:17:49,673 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:17:49,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:17:49,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:17:49,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:17:49,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:17:49,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:17:49,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:17:49,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:17:49,736 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:17:49,738 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:17:52,157 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:17:53,011 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:17:53,011 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:17:53,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:17:53 BoogieIcfgContainer [2023-04-01 10:17:53,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:17:53,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:17:53,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:17:53,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:17:53,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:17:48" (1/3) ... [2023-04-01 10:17:53,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6361432b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:17:53, skipping insertion in model container [2023-04-01 10:17:53,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:17:49" (2/3) ... [2023-04-01 10:17:53,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6361432b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:17:53, skipping insertion in model container [2023-04-01 10:17:53,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:17:53" (3/3) ... [2023-04-01 10:17:53,021 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label39.c [2023-04-01 10:17:53,037 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:17:53,037 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:17:53,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:17:53,099 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;@6bffed64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:17:53,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:17:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:17:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:17:53,111 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:53,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:53,112 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:53,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:53,117 INFO L85 PathProgramCache]: Analyzing trace with hash 271510979, now seen corresponding path program 1 times [2023-04-01 10:17:53,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:53,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042834604] [2023-04-01 10:17:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:53,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:53,470 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 10:17:53,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:53,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042834604] [2023-04-01 10:17:53,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042834604] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:53,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:53,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:17:53,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59663643] [2023-04-01 10:17:53,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:53,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:17:53,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:53,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:17:53,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:53,504 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 10:17:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:55,450 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:17:55,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:17:55,453 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 10:17:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:55,466 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:17:55,466 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:17:55,472 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 10:17:55,476 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 238 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:55,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 181 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 10:17:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:17:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 10:17:55,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.5969498910675382) internal successors, (733), 459 states have internal predecessors, (733), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 10:17:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 744 transitions. [2023-04-01 10:17:55,546 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 744 transitions. Word has length 11 [2023-04-01 10:17:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:55,547 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 744 transitions. [2023-04-01 10:17:55,547 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 10:17:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 744 transitions. [2023-04-01 10:17:55,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:17:55,549 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:55,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:55,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:17:55,549 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:55,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:55,550 INFO L85 PathProgramCache]: Analyzing trace with hash 9193693, now seen corresponding path program 1 times [2023-04-01 10:17:55,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:55,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897779680] [2023-04-01 10:17:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:55,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:55,832 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 10:17:55,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:55,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897779680] [2023-04-01 10:17:55,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897779680] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:17:55,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:17:55,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:17:55,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597149515] [2023-04-01 10:17:55,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:55,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:17:55,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:55,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:17:55,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:17:55,836 INFO L87 Difference]: Start difference. First operand 469 states and 744 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:17:57,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:17:57,357 INFO L93 Difference]: Finished difference Result 1164 states and 1942 transitions. [2023-04-01 10:17:57,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:17:57,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-04-01 10:17:57,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:17:57,363 INFO L225 Difference]: With dead ends: 1164 [2023-04-01 10:17:57,363 INFO L226 Difference]: Without dead ends: 700 [2023-04-01 10:17:57,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 10:17:57,366 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 253 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:17:57,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 355 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 10:17:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2023-04-01 10:17:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 697. [2023-04-01 10:17:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 685 states have (on average 1.5532846715328468) internal successors, (1064), 685 states have internal predecessors, (1064), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-04-01 10:17:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1081 transitions. [2023-04-01 10:17:57,408 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1081 transitions. Word has length 21 [2023-04-01 10:17:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:17:57,409 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 1081 transitions. [2023-04-01 10:17:57,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:17:57,409 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1081 transitions. [2023-04-01 10:17:57,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 10:17:57,410 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:17:57,410 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:17:57,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:17:57,410 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:17:57,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:17:57,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1986799296, now seen corresponding path program 1 times [2023-04-01 10:17:57,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:17:57,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120908517] [2023-04-01 10:17:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:57,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:17:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 10:17:57,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:17:57,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120908517] [2023-04-01 10:17:57,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120908517] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:17:57,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439153567] [2023-04-01 10:17:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:17:57,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:17:57,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:17:57,707 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 10:17:57,720 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 10:17:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:17:57,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 10:17:57,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:17:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 10:17:57,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:17:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 10:17:58,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439153567] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 10:17:58,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 10:17:58,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-04-01 10:17:58,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290747934] [2023-04-01 10:17:58,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:17:58,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:17:58,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:17:58,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:17:58,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:17:58,112 INFO L87 Difference]: Start difference. First operand 697 states and 1081 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:18:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:18:00,090 INFO L93 Difference]: Finished difference Result 1863 states and 2972 transitions. [2023-04-01 10:18:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:18:00,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-04-01 10:18:00,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:18:00,097 INFO L225 Difference]: With dead ends: 1863 [2023-04-01 10:18:00,097 INFO L226 Difference]: Without dead ends: 1171 [2023-04-01 10:18:00,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:18:00,100 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 832 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:18:00,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 37 Invalid, 1634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 10:18:00,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2023-04-01 10:18:00,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1167. [2023-04-01 10:18:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1144 states have (on average 1.3776223776223777) internal successors, (1576), 1149 states have internal predecessors, (1576), 9 states have call successors, (9), 9 states have call predecessors, (9), 13 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2023-04-01 10:18:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1612 transitions. [2023-04-01 10:18:00,141 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1612 transitions. Word has length 34 [2023-04-01 10:18:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:18:00,141 INFO L495 AbstractCegarLoop]: Abstraction has 1167 states and 1612 transitions. [2023-04-01 10:18:00,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 10:18:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1612 transitions. [2023-04-01 10:18:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 10:18:00,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:18:00,143 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:18:00,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 10:18:00,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:18:00,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:18:00,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:18:00,351 INFO L85 PathProgramCache]: Analyzing trace with hash 991225558, now seen corresponding path program 1 times [2023-04-01 10:18:00,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:18:00,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886188661] [2023-04-01 10:18:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:18:00,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:18:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:18:00,516 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 10:18:00,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:18:00,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886188661] [2023-04-01 10:18:00,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886188661] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:18:00,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:18:00,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:18:00,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061825141] [2023-04-01 10:18:00,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:18:00,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:18:00,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:18:00,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:18:00,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:18:00,523 INFO L87 Difference]: Start difference. First operand 1167 states and 1612 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:18:02,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:18:02,734 INFO L93 Difference]: Finished difference Result 3562 states and 4991 transitions. [2023-04-01 10:18:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:18:02,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-04-01 10:18:02,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:18:02,745 INFO L225 Difference]: With dead ends: 3562 [2023-04-01 10:18:02,745 INFO L226 Difference]: Without dead ends: 2400 [2023-04-01 10:18:02,748 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 10:18:02,749 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 697 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1535 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 1535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:18:02,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 53 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 1535 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 10:18:02,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2023-04-01 10:18:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2354. [2023-04-01 10:18:02,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 2297 states have (on average 1.235959947757945) internal successors, (2839), 2322 states have internal predecessors, (2839), 16 states have call successors, (16), 16 states have call predecessors, (16), 40 states have return successors, (103), 15 states have call predecessors, (103), 15 states have call successors, (103) [2023-04-01 10:18:02,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 2958 transitions. [2023-04-01 10:18:02,820 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 2958 transitions. Word has length 37 [2023-04-01 10:18:02,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:18:02,821 INFO L495 AbstractCegarLoop]: Abstraction has 2354 states and 2958 transitions. [2023-04-01 10:18:02,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:18:02,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 2958 transitions. [2023-04-01 10:18:02,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-04-01 10:18:02,835 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:18:02,836 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:18:02,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:18:02,836 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:18:02,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:18:02,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2080113074, now seen corresponding path program 1 times [2023-04-01 10:18:02,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:18:02,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665055336] [2023-04-01 10:18:02,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:18:02,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:18:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:18:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:18:03,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:18:03,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665055336] [2023-04-01 10:18:03,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665055336] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:18:03,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350208227] [2023-04-01 10:18:03,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:18:03,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:18:03,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:18:03,273 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 10:18:03,292 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 10:18:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:18:03,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:18:03,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:18:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:18:03,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:18:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:18:03,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350208227] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:18:03,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1733970643] [2023-04-01 10:18:03,683 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 10:18:03,683 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:18:03,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:18:03,691 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:18:03,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:18:04,187 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 10:18:05,745 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 56