/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/Problem17_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:25:30,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:25:30,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:25:30,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:25:30,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:25:30,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:25:30,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:25:30,536 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:25:30,538 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:25:30,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:25:30,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:25:30,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:25:30,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:25:30,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:25:30,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:25:30,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:25:30,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:25:30,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:25:30,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:25:30,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:25:30,550 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:25:30,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:25:30,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:25:30,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:25:30,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:25:30,569 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:25:30,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:25:30,570 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:25:30,571 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:25:30,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:25:30,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:25:30,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:25:30,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:25:30,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:25:30,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:25:30,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:25:30,575 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:25:30,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:25:30,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:25:30,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:25:30,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:25:30,581 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 10:25:30,616 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:25:30,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:25:30,617 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:25:30,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:25:30,617 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:25:30,618 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:25:30,618 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:25:30,618 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:25:30,618 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:25:30,618 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:25:30,618 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:25:30,618 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:25:30,618 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:25:30,618 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:25:30,619 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:25:30,619 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:25:30,619 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:25:30,619 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:25:30,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:25:30,620 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:25:30,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:25:30,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:25:30,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:25:30,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:25:30,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:25:30,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:25:30,623 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:25:30,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:25:30,623 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:25:30,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:25:30,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:25:30,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:25:30,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:25:30,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:25:30,624 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:25:30,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:25:30,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:25:30,629 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:25:30,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:25:30,629 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:25:30,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:25:30,629 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:25:30,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:25:30,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:25:30,901 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:25:30,901 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:25:30,902 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:25:30,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label23.c [2023-04-01 10:25:32,025 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:25:32,426 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:25:32,426 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label23.c [2023-04-01 10:25:32,449 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/614f9948c/666b2c41a7f149b096183fa0495bcf22/FLAG03134d084 [2023-04-01 10:25:32,465 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/614f9948c/666b2c41a7f149b096183fa0495bcf22 [2023-04-01 10:25:32,467 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:25:32,469 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:25:32,472 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:25:32,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:25:32,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:25:32,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:25:32" (1/1) ... [2023-04-01 10:25:32,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@185a1ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:25:32, skipping insertion in model container [2023-04-01 10:25:32,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:25:32" (1/1) ... [2023-04-01 10:25:32,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:25:32,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:25:32,777 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/Problem17_label23.c[3293,3306] [2023-04-01 10:25:33,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:25:33,321 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:25:33,346 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/Problem17_label23.c[3293,3306] [2023-04-01 10:25:33,582 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:25:33,600 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:25:33,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:25:33 WrapperNode [2023-04-01 10:25:33,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:25:33,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:25:33,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:25:33,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:25:33,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:25:33" (1/1) ... [2023-04-01 10:25:33,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:25:33" (1/1) ... [2023-04-01 10:25:33,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:25:33" (1/1) ... [2023-04-01 10:25:33,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:25:33" (1/1) ... [2023-04-01 10:25:33,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:25:33" (1/1) ... [2023-04-01 10:25:33,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:25:33" (1/1) ... [2023-04-01 10:25:33,780 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:25:33" (1/1) ... [2023-04-01 10:25:33,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:25:33" (1/1) ... [2023-04-01 10:25:33,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:25:33,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:25:33,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:25:33,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:25:33,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:25:33" (1/1) ... [2023-04-01 10:25:33,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:25:33,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:25:33,839 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 10:25:33,841 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 10:25:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:25:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:25:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:25:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:25:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:25:33,866 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:25:33,866 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:25:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:25:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:25:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:25:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:25:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:25:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:25:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:25:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:25:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:25:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:25:33,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:25:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:25:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:25:33,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:25:33,936 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:25:33,938 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:25:37,184 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:25:46,112 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:25:46,112 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:25:46,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:25:46 BoogieIcfgContainer [2023-04-01 10:25:46,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:25:46,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:25:46,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:25:46,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:25:46,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:25:32" (1/3) ... [2023-04-01 10:25:46,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0df6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:25:46, skipping insertion in model container [2023-04-01 10:25:46,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:25:33" (2/3) ... [2023-04-01 10:25:46,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0df6ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:25:46, skipping insertion in model container [2023-04-01 10:25:46,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:25:46" (3/3) ... [2023-04-01 10:25:46,124 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label23.c [2023-04-01 10:25:46,140 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:25:46,140 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:25:46,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:25:46,196 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;@7ebe12b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:25:46,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:25:46,203 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 10:25:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:25:46,207 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:25:46,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:25:46,208 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:25:46,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:25:46,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1887801398, now seen corresponding path program 1 times [2023-04-01 10:25:46,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:25:46,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544886593] [2023-04-01 10:25:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:25:46,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:25:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:25:46,516 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 10:25:46,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:25:46,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544886593] [2023-04-01 10:25:46,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544886593] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:25:46,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:25:46,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:25:46,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629044259] [2023-04-01 10:25:46,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:25:46,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:25:46,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:25:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:25:46,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:25:46,547 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 10:25:48,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:25:48,127 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:25:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:25:48,128 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 10:25:48,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:25:48,140 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:25:48,140 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:25:48,145 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 10:25:48,149 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 241 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:25:48,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 60 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 10:25:48,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:25:48,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 464. [2023-04-01 10:25:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 454 states have (on average 1.8986784140969164) internal successors, (862), 454 states have internal predecessors, (862), 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 10:25:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 873 transitions. [2023-04-01 10:25:48,206 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 873 transitions. Word has length 11 [2023-04-01 10:25:48,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:25:48,206 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 873 transitions. [2023-04-01 10:25:48,206 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 10:25:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 873 transitions. [2023-04-01 10:25:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:25:48,208 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:25:48,208 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 10:25:48,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:25:48,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:25:48,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:25:48,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1229990306, now seen corresponding path program 1 times [2023-04-01 10:25:48,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:25:48,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887019190] [2023-04-01 10:25:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:25:48,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:25:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:25:48,487 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 10:25:48,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:25:48,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887019190] [2023-04-01 10:25:48,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887019190] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:25:48,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:25:48,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:25:48,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990344514] [2023-04-01 10:25:48,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:25:48,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:25:48,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:25:48,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:25:48,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:25:48,491 INFO L87 Difference]: Start difference. First operand 464 states and 873 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 10:25:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:25:50,514 INFO L93 Difference]: Finished difference Result 1398 states and 2661 transitions. [2023-04-01 10:25:50,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:25:50,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 10:25:50,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:25:50,520 INFO L225 Difference]: With dead ends: 1398 [2023-04-01 10:25:50,521 INFO L226 Difference]: Without dead ends: 939 [2023-04-01 10:25:50,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:25:50,524 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 710 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1501 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:25:50,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [710 Valid, 54 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1501 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 10:25:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2023-04-01 10:25:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 869. [2023-04-01 10:25:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 851 states have (on average 1.6122209165687427) internal successors, (1372), 855 states have internal predecessors, (1372), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (26), 6 states have call predecessors, (26), 6 states have call successors, (26) [2023-04-01 10:25:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1405 transitions. [2023-04-01 10:25:50,605 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1405 transitions. Word has length 21 [2023-04-01 10:25:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:25:50,605 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1405 transitions. [2023-04-01 10:25:50,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 10:25:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1405 transitions. [2023-04-01 10:25:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 10:25:50,606 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:25:50,606 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:25:50,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:25:50,607 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:25:50,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:25:50,607 INFO L85 PathProgramCache]: Analyzing trace with hash 308738718, now seen corresponding path program 1 times [2023-04-01 10:25:50,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:25:50,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257288893] [2023-04-01 10:25:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:25:50,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:25:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:25:50,734 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 10:25:50,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:25:50,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257288893] [2023-04-01 10:25:50,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257288893] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:25:50,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:25:50,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:25:50,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147632196] [2023-04-01 10:25:50,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:25:50,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:25:50,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:25:50,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:25:50,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:25:50,737 INFO L87 Difference]: Start difference. First operand 869 states and 1405 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 10:25:52,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:25:52,685 INFO L93 Difference]: Finished difference Result 2642 states and 4335 transitions. [2023-04-01 10:25:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:25:52,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 10:25:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:25:52,693 INFO L225 Difference]: With dead ends: 2642 [2023-04-01 10:25:52,693 INFO L226 Difference]: Without dead ends: 1778 [2023-04-01 10:25:52,695 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 10:25:52,696 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 736 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:25:52,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 46 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-04-01 10:25:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2023-04-01 10:25:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1112. [2023-04-01 10:25:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1084 states have (on average 1.4833948339483394) internal successors, (1608), 1094 states have internal predecessors, (1608), 9 states have call successors, (9), 9 states have call predecessors, (9), 18 states have return successors, (54), 8 states have call predecessors, (54), 8 states have call successors, (54) [2023-04-01 10:25:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1671 transitions. [2023-04-01 10:25:52,735 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1671 transitions. Word has length 23 [2023-04-01 10:25:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:25:52,736 INFO L495 AbstractCegarLoop]: Abstraction has 1112 states and 1671 transitions. [2023-04-01 10:25:52,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 10:25:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1671 transitions. [2023-04-01 10:25:52,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 10:25:52,737 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:25:52,737 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] [2023-04-01 10:25:52,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:25:52,737 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:25:52,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:25:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1572433666, now seen corresponding path program 1 times [2023-04-01 10:25:52,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:25:52,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767583346] [2023-04-01 10:25:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:25:52,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:25:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:25:52,872 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 10:25:52,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:25:52,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767583346] [2023-04-01 10:25:52,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767583346] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:25:52,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:25:52,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:25:52,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754961621] [2023-04-01 10:25:52,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:25:52,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:25:52,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:25:52,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:25:52,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:25:52,874 INFO L87 Difference]: Start difference. First operand 1112 states and 1671 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 10:25:55,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 10:25:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:25:56,309 INFO L93 Difference]: Finished difference Result 2921 states and 4535 transitions. [2023-04-01 10:25:56,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:25:56,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 26 [2023-04-01 10:25:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:25:56,318 INFO L225 Difference]: With dead ends: 2921 [2023-04-01 10:25:56,318 INFO L226 Difference]: Without dead ends: 1814 [2023-04-01 10:25:56,321 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 10:25:56,322 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 248 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 266 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:25:56,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 388 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 656 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 10:25:56,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2023-04-01 10:25:56,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1597. [2023-04-01 10:25:56,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1558 states have (on average 1.4152759948652118) internal successors, (2205), 1573 states have internal predecessors, (2205), 12 states have call successors, (12), 12 states have call predecessors, (12), 26 states have return successors, (113), 11 states have call predecessors, (113), 11 states have call successors, (113) [2023-04-01 10:25:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2330 transitions. [2023-04-01 10:25:56,363 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2330 transitions. Word has length 26 [2023-04-01 10:25:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:25:56,363 INFO L495 AbstractCegarLoop]: Abstraction has 1597 states and 2330 transitions. [2023-04-01 10:25:56,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 10:25:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2330 transitions. [2023-04-01 10:25:56,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 10:25:56,365 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:25:56,365 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:25:56,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:25:56,366 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:25:56,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:25:56,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1207926834, now seen corresponding path program 1 times [2023-04-01 10:25:56,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:25:56,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228678851] [2023-04-01 10:25:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:25:56,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:25:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:25:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:25:56,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:25:56,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228678851] [2023-04-01 10:25:56,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228678851] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:25:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044882689] [2023-04-01 10:25:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:25:56,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:25:56,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:25:56,505 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 10:25:56,522 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 10:25:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:25:56,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:25:56,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:25:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:25:56,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:25:56,816 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:25:56,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044882689] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:25:56,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [916503991] [2023-04-01 10:25:56,858 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-04-01 10:25:56,859 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:25:56,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:25:56,865 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:25:56,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:25:57,169 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 82 for LOIs [2023-04-01 10:25:57,486 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 15 [2023-04-01 10:25:57,930 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 46 [2023-04-01 10:25:59,207 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 22324 conjuctions. This might take some time... [2023-04-01 10:25:59,786 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 174 conjuctions. [2023-04-01 10:26:17,360 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5830 conjuctions. This might take some time... [2023-04-01 10:26:19,424 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 5830 conjuctions.