/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/Problem13_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:07:46,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:07:46,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:07:46,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:07:46,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:07:46,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:07:46,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:07:46,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:07:46,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:07:46,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:07:46,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:07:46,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:07:46,470 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:07:46,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:07:46,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:07:46,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:07:46,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:07:46,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:07:46,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:07:46,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:07:46,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:07:46,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:07:46,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:07:46,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:07:46,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:07:46,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:07:46,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:07:46,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:07:46,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:07:46,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:07:46,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:07:46,503 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:07:46,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:07:46,505 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:07:46,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:07:46,506 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:07:46,507 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:07:46,507 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:07:46,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:07:46,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:07:46,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:07:46,510 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 10:07:46,542 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:07:46,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:07:46,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:07:46,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:07:46,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:07:46,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:07:46,544 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:07:46,544 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:07:46,545 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:07:46,545 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:07:46,545 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:07:46,545 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:07:46,546 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:07:46,546 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:07:46,546 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:07:46,546 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:07:46,546 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:07:46,546 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:07:46,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:07:46,547 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:07:46,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:07:46,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:07:46,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:07:46,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:07:46,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:07:46,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:07:46,548 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:07:46,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:07:46,548 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:07:46,548 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:07:46,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:07:46,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:07:46,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:07:46,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:07:46,549 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:07:46,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:07:46,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:07:46,549 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:07:46,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:07:46,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:07:46,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:07:46,550 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:07:46,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:07:46,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:07:46,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:07:46,766 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:07:46,766 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:07:46,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label19.c [2023-04-01 10:07:47,949 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:07:48,422 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:07:48,423 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label19.c [2023-04-01 10:07:48,454 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff9318fc3/572a9b732b8c48e0823243b14a9e7e47/FLAGe191c087f [2023-04-01 10:07:48,471 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff9318fc3/572a9b732b8c48e0823243b14a9e7e47 [2023-04-01 10:07:48,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:07:48,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:07:48,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:07:48,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:07:48,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:07:48,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:07:48" (1/1) ... [2023-04-01 10:07:48,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d8d324e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:48, skipping insertion in model container [2023-04-01 10:07:48,485 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:07:48" (1/1) ... [2023-04-01 10:07:48,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:07:48,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:07:48,807 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/Problem13_label19.c[2731,2744] [2023-04-01 10:07:49,722 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:07:49,733 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:07:49,759 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/Problem13_label19.c[2731,2744] [2023-04-01 10:07:50,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:07:50,202 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:07:50,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:50 WrapperNode [2023-04-01 10:07:50,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:07:50,205 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:07:50,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:07:50,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:07:50,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:50" (1/1) ... [2023-04-01 10:07:50,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:50" (1/1) ... [2023-04-01 10:07:50,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:50" (1/1) ... [2023-04-01 10:07:50,326 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:50" (1/1) ... [2023-04-01 10:07:50,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:50" (1/1) ... [2023-04-01 10:07:50,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:50" (1/1) ... [2023-04-01 10:07:50,512 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:50" (1/1) ... [2023-04-01 10:07:50,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:50" (1/1) ... [2023-04-01 10:07:50,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:07:50,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:07:50,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:07:50,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:07:50,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:50" (1/1) ... [2023-04-01 10:07:50,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:07:50,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:07:50,598 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 10:07:50,621 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 10:07:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:07:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:07:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:07:50,639 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:07:50,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:07:50,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:07:50,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:07:50,640 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:07:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:07:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:07:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:07:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:07:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:07:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:07:50,640 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:07:50,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:07:50,738 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:07:50,740 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:07:55,793 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:07:58,517 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:07:58,517 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:07:58,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:07:58 BoogieIcfgContainer [2023-04-01 10:07:58,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:07:58,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:07:58,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:07:58,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:07:58,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:07:48" (1/3) ... [2023-04-01 10:07:58,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f9b952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:07:58, skipping insertion in model container [2023-04-01 10:07:58,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:07:50" (2/3) ... [2023-04-01 10:07:58,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f9b952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:07:58, skipping insertion in model container [2023-04-01 10:07:58,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:07:58" (3/3) ... [2023-04-01 10:07:58,534 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label19.c [2023-04-01 10:07:58,551 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:07:58,551 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:07:58,620 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:07:58,627 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;@1067d981, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:07:58,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:07:58,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:07:58,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:07:58,646 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:07:58,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:07:58,647 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:07:58,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:07:58,654 INFO L85 PathProgramCache]: Analyzing trace with hash -134423787, now seen corresponding path program 1 times [2023-04-01 10:07:58,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:07:58,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780185585] [2023-04-01 10:07:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:07:58,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:07:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:07:58,990 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 10:07:58,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:07:58,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780185585] [2023-04-01 10:07:58,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780185585] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:07:58,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:07:58,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:07:58,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782160179] [2023-04-01 10:07:58,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:07:58,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:07:58,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:07:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:07:59,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:07:59,035 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:08:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:02,945 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:08:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:08:02,946 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 10:08:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:02,967 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:08:02,967 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:08:02,977 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 10:08:02,980 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 715 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 715 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 2997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:02,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [715 Valid, 104 Invalid, 2997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 10:08:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:08:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1360. [2023-04-01 10:08:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1342 states have (on average 1.9418777943368106) internal successors, (2606), 1342 states have internal predecessors, (2606), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 10:08:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2629 transitions. [2023-04-01 10:08:03,084 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2629 transitions. Word has length 11 [2023-04-01 10:08:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:03,084 INFO L495 AbstractCegarLoop]: Abstraction has 1360 states and 2629 transitions. [2023-04-01 10:08:03,084 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 10:08:03,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2629 transitions. [2023-04-01 10:08:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:08:03,086 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:03,086 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 10:08:03,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:08:03,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:03,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash -625385714, now seen corresponding path program 1 times [2023-04-01 10:08:03,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:03,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496764750] [2023-04-01 10:08:03,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:03,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:03,297 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 10:08:03,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:03,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496764750] [2023-04-01 10:08:03,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496764750] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:08:03,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:08:03,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:08:03,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178676587] [2023-04-01 10:08:03,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:03,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:08:03,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:03,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:08:03,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:08:03,301 INFO L87 Difference]: Start difference. First operand 1360 states and 2629 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 10:08:08,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:08,036 INFO L93 Difference]: Finished difference Result 4145 states and 8028 transitions. [2023-04-01 10:08:08,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:08:08,038 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 10:08:08,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:08,055 INFO L225 Difference]: With dead ends: 4145 [2023-04-01 10:08:08,056 INFO L226 Difference]: Without dead ends: 2790 [2023-04-01 10:08:08,066 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 10:08:08,069 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2457 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3741 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2457 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 3741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:08,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2457 Valid, 109 Invalid, 4905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1164 Valid, 3741 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 10:08:08,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-04-01 10:08:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2730. [2023-04-01 10:08:08,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2730 states, 2687 states have (on average 1.6278377372534425) internal successors, (4374), 2692 states have internal predecessors, (4374), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75) [2023-04-01 10:08:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2730 states to 2730 states and 4464 transitions. [2023-04-01 10:08:08,180 INFO L78 Accepts]: Start accepts. Automaton has 2730 states and 4464 transitions. Word has length 21 [2023-04-01 10:08:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:08,180 INFO L495 AbstractCegarLoop]: Abstraction has 2730 states and 4464 transitions. [2023-04-01 10:08:08,181 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 10:08:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2730 states and 4464 transitions. [2023-04-01 10:08:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 10:08:08,182 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:08,182 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] [2023-04-01 10:08:08,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:08:08,182 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:08,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:08,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1958281022, now seen corresponding path program 1 times [2023-04-01 10:08:08,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:08,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649348920] [2023-04-01 10:08:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:08,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:08,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:08,422 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 10:08:08,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:08,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649348920] [2023-04-01 10:08:08,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649348920] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:08:08,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:08:08,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:08:08,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573302156] [2023-04-01 10:08:08,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:08,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:08:08,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:08,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:08:08,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:08:08,424 INFO L87 Difference]: Start difference. First operand 2730 states and 4464 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:08:13,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:13,278 INFO L93 Difference]: Finished difference Result 8478 states and 14185 transitions. [2023-04-01 10:08:13,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:08:13,281 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-04-01 10:08:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:13,307 INFO L225 Difference]: With dead ends: 8478 [2023-04-01 10:08:13,307 INFO L226 Difference]: Without dead ends: 5753 [2023-04-01 10:08:13,314 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 10:08:13,315 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2187 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4656 mSolverCounterSat, 1049 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2187 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 5705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1049 IncrementalHoareTripleChecker+Valid, 4656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:13,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2187 Valid, 124 Invalid, 5705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1049 Valid, 4656 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-04-01 10:08:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5753 states. [2023-04-01 10:08:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5753 to 5609. [2023-04-01 10:08:13,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5609 states, 5463 states have (on average 1.4363902617609372) internal successors, (7847), 5498 states have internal predecessors, (7847), 27 states have call successors, (27), 27 states have call predecessors, (27), 118 states have return successors, (459), 83 states have call predecessors, (459), 26 states have call successors, (459) [2023-04-01 10:08:13,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5609 states to 5609 states and 8333 transitions. [2023-04-01 10:08:13,468 INFO L78 Accepts]: Start accepts. Automaton has 5609 states and 8333 transitions. Word has length 27 [2023-04-01 10:08:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:13,468 INFO L495 AbstractCegarLoop]: Abstraction has 5609 states and 8333 transitions. [2023-04-01 10:08:13,469 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:08:13,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5609 states and 8333 transitions. [2023-04-01 10:08:13,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 10:08:13,471 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:13,471 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:08:13,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:08:13,471 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:13,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:13,472 INFO L85 PathProgramCache]: Analyzing trace with hash 779986027, now seen corresponding path program 1 times [2023-04-01 10:08:13,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:13,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440768817] [2023-04-01 10:08:13,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:13,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:08:13,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:13,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440768817] [2023-04-01 10:08:13,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440768817] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:08:13,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226743014] [2023-04-01 10:08:13,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:13,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:08:13,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:08:13,677 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 10:08:13,677 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 10:08:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:13,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:08:13,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:08:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:08:13,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:08:13,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226743014] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:08:13,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:08:13,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:08:13,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085987826] [2023-04-01 10:08:13,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:13,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:08:13,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:13,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:08:13,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:08:13,869 INFO L87 Difference]: Start difference. First operand 5609 states and 8333 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:08:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:18,251 INFO L93 Difference]: Finished difference Result 17105 states and 26427 transitions. [2023-04-01 10:08:18,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:08:18,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-04-01 10:08:18,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:18,300 INFO L225 Difference]: With dead ends: 17105 [2023-04-01 10:08:18,300 INFO L226 Difference]: Without dead ends: 11501 [2023-04-01 10:08:18,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:08:18,319 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2098 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4111 mSolverCounterSat, 1137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1137 IncrementalHoareTripleChecker+Valid, 4111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:18,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2098 Valid, 95 Invalid, 5248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1137 Valid, 4111 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-04-01 10:08:18,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11501 states. [2023-04-01 10:08:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11501 to 11238. [2023-04-01 10:08:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11238 states, 10909 states have (on average 1.2722522687689064) internal successors, (13879), 10998 states have internal predecessors, (13879), 51 states have call successors, (51), 51 states have call predecessors, (51), 277 states have return successors, (1463), 188 states have call predecessors, (1463), 50 states have call successors, (1463) [2023-04-01 10:08:18,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 15393 transitions. [2023-04-01 10:08:18,604 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 15393 transitions. Word has length 45 [2023-04-01 10:08:18,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:18,604 INFO L495 AbstractCegarLoop]: Abstraction has 11238 states and 15393 transitions. [2023-04-01 10:08:18,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:08:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 15393 transitions. [2023-04-01 10:08:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 10:08:18,612 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:18,612 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:08:18,622 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 10:08:18,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:08:18,823 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:18,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:18,823 INFO L85 PathProgramCache]: Analyzing trace with hash -509230058, now seen corresponding path program 1 times [2023-04-01 10:08:18,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:18,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086250919] [2023-04-01 10:08:18,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:18,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:08:19,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:19,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086250919] [2023-04-01 10:08:19,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086250919] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:08:19,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757075903] [2023-04-01 10:08:19,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:19,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:08:19,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:08:19,225 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 10:08:19,228 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 10:08:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:19,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 10:08:19,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:08:19,448 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 10:08:19,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:08:19,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757075903] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:08:19,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:08:19,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-04-01 10:08:19,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366740918] [2023-04-01 10:08:19,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:19,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:08:19,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:19,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:08:19,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:08:19,450 INFO L87 Difference]: Start difference. First operand 11238 states and 15393 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 10:08:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:23,313 INFO L93 Difference]: Finished difference Result 23691 states and 32491 transitions. [2023-04-01 10:08:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:08:23,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 70 [2023-04-01 10:08:23,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:23,357 INFO L225 Difference]: With dead ends: 23691 [2023-04-01 10:08:23,357 INFO L226 Difference]: Without dead ends: 12458 [2023-04-01 10:08:23,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:08:23,377 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1953 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 4516 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1953 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 4655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 4516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:23,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1953 Valid, 116 Invalid, 4655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4516 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 10:08:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12458 states. [2023-04-01 10:08:23,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12458 to 12164. [2023-04-01 10:08:23,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12164 states, 11724 states have (on average 1.2540941658137155) internal successors, (14703), 11860 states have internal predecessors, (14703), 54 states have call successors, (54), 54 states have call predecessors, (54), 385 states have return successors, (1737), 249 states have call predecessors, (1737), 53 states have call successors, (1737) [2023-04-01 10:08:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12164 states to 12164 states and 16494 transitions. [2023-04-01 10:08:23,663 INFO L78 Accepts]: Start accepts. Automaton has 12164 states and 16494 transitions. Word has length 70 [2023-04-01 10:08:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:23,665 INFO L495 AbstractCegarLoop]: Abstraction has 12164 states and 16494 transitions. [2023-04-01 10:08:23,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 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 10:08:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 12164 states and 16494 transitions. [2023-04-01 10:08:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 10:08:23,668 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:23,668 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:08:23,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 10:08:23,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:08:23,880 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:23,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:23,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1875044620, now seen corresponding path program 1 times [2023-04-01 10:08:23,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:23,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609240107] [2023-04-01 10:08:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:23,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:24,052 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 10:08:24,052 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:24,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609240107] [2023-04-01 10:08:24,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609240107] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:08:24,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:08:24,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:08:24,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029345404] [2023-04-01 10:08:24,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:24,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:08:24,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:24,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:08:24,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:08:24,055 INFO L87 Difference]: Start difference. First operand 12164 states and 16494 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:08:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:27,513 INFO L93 Difference]: Finished difference Result 29251 states and 42530 transitions. [2023-04-01 10:08:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:08:27,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-04-01 10:08:27,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:27,575 INFO L225 Difference]: With dead ends: 29251 [2023-04-01 10:08:27,575 INFO L226 Difference]: Without dead ends: 17741 [2023-04-01 10:08:27,606 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 10:08:27,606 INFO L413 NwaCegarLoop]: 1253 mSDtfsCounter, 673 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2273 mSolverCounterSat, 630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 2903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 2273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:27,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1281 Invalid, 2903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [630 Valid, 2273 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 10:08:27,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17741 states. [2023-04-01 10:08:27,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17741 to 17151. [2023-04-01 10:08:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17151 states, 16578 states have (on average 1.2170949451079744) internal successors, (20177), 16754 states have internal predecessors, (20177), 77 states have call successors, (77), 77 states have call predecessors, (77), 495 states have return successors, (3050), 319 states have call predecessors, (3050), 76 states have call successors, (3050) [2023-04-01 10:08:28,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17151 states to 17151 states and 23304 transitions. [2023-04-01 10:08:28,124 INFO L78 Accepts]: Start accepts. Automaton has 17151 states and 23304 transitions. Word has length 79 [2023-04-01 10:08:28,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:28,126 INFO L495 AbstractCegarLoop]: Abstraction has 17151 states and 23304 transitions. [2023-04-01 10:08:28,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 10:08:28,126 INFO L276 IsEmpty]: Start isEmpty. Operand 17151 states and 23304 transitions. [2023-04-01 10:08:28,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 10:08:28,128 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:28,128 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:08:28,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 10:08:28,129 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:28,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:28,133 INFO L85 PathProgramCache]: Analyzing trace with hash 511485999, now seen corresponding path program 1 times [2023-04-01 10:08:28,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:28,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226510250] [2023-04-01 10:08:28,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:28,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:28,271 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 10:08:28,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:28,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226510250] [2023-04-01 10:08:28,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226510250] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:08:28,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:08:28,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:08:28,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201624945] [2023-04-01 10:08:28,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:28,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:08:28,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:28,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:08:28,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:08:28,274 INFO L87 Difference]: Start difference. First operand 17151 states and 23304 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 10:08:31,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:31,777 INFO L93 Difference]: Finished difference Result 48764 states and 69439 transitions. [2023-04-01 10:08:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:08:31,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 81 [2023-04-01 10:08:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:31,901 INFO L225 Difference]: With dead ends: 48764 [2023-04-01 10:08:31,901 INFO L226 Difference]: Without dead ends: 32267 [2023-04-01 10:08:31,946 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 10:08:31,947 INFO L413 NwaCegarLoop]: 1253 mSDtfsCounter, 673 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:31,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 1281 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 10:08:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32267 states. [2023-04-01 10:08:32,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32267 to 29430. [2023-04-01 10:08:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29430 states, 28610 states have (on average 1.1813002446696959) internal successors, (33797), 28851 states have internal predecessors, (33797), 133 states have call successors, (133), 133 states have call predecessors, (133), 686 states have return successors, (6020), 445 states have call predecessors, (6020), 132 states have call successors, (6020) [2023-04-01 10:08:32,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29430 states to 29430 states and 39950 transitions. [2023-04-01 10:08:32,584 INFO L78 Accepts]: Start accepts. Automaton has 29430 states and 39950 transitions. Word has length 81 [2023-04-01 10:08:32,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:32,584 INFO L495 AbstractCegarLoop]: Abstraction has 29430 states and 39950 transitions. [2023-04-01 10:08:32,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 10:08:32,585 INFO L276 IsEmpty]: Start isEmpty. Operand 29430 states and 39950 transitions. [2023-04-01 10:08:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-01 10:08:32,586 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:32,587 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 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] [2023-04-01 10:08:32,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 10:08:32,587 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:08:32,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:08:32,587 INFO L85 PathProgramCache]: Analyzing trace with hash -451151275, now seen corresponding path program 1 times [2023-04-01 10:08:32,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:08:32,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525934034] [2023-04-01 10:08:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:32,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:08:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 10:08:32,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:08:32,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525934034] [2023-04-01 10:08:32,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525934034] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:08:32,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049784896] [2023-04-01 10:08:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:08:32,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:08:32,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:08:32,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:08:32,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 10:08:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:08:32,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 10:08:32,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:08:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-01 10:08:33,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:08:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-04-01 10:08:33,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049784896] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 10:08:33,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 10:08:33,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-01 10:08:33,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448631592] [2023-04-01 10:08:33,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:08:33,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:08:33,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:08:33,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:08:33,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 10:08:33,592 INFO L87 Difference]: Start difference. First operand 29430 states and 39950 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 10:08:37,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:08:37,481 INFO L93 Difference]: Finished difference Result 74296 states and 104241 transitions. [2023-04-01 10:08:37,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:08:37,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 85 [2023-04-01 10:08:37,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:08:37,658 INFO L225 Difference]: With dead ends: 74296 [2023-04-01 10:08:37,658 INFO L226 Difference]: Without dead ends: 45256 [2023-04-01 10:08:37,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 162 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-04-01 10:08:37,728 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2411 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3532 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2411 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 4391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 3532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:08:37,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2411 Valid, 83 Invalid, 4391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 3532 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 10:08:37,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45256 states. [2023-04-01 10:08:38,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45256 to 43990. [2023-04-01 10:08:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43990 states, 42687 states have (on average 1.1707779886148009) internal successors, (49977), 43096 states have internal predecessors, (49977), 197 states have call successors, (197), 197 states have call predecessors, (197), 1105 states have return successors, (9771), 696 states have call predecessors, (9771), 196 states have call successors, (9771) [2023-04-01 10:08:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43990 states to 43990 states and 59945 transitions. [2023-04-01 10:08:38,990 INFO L78 Accepts]: Start accepts. Automaton has 43990 states and 59945 transitions. Word has length 85 [2023-04-01 10:08:38,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:08:38,994 INFO L495 AbstractCegarLoop]: Abstraction has 43990 states and 59945 transitions. [2023-04-01 10:08:38,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 4 states have internal predecessors, (44), 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 10:08:38,994 INFO L276 IsEmpty]: Start isEmpty. Operand 43990 states and 59945 transitions. [2023-04-01 10:08:38,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-01 10:08:39,000 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:08:39,001 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 10:08:39,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0