/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem16_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:17:11,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:17:11,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:17:11,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:17:11,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:17:11,560 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:17:11,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:17:11,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:17:11,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:17:11,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:17:11,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:17:11,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:17:11,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:17:11,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:17:11,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:17:11,583 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:17:11,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:17:11,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:17:11,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:17:11,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:17:11,593 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:17:11,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:17:11,596 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:17:11,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:17:11,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:17:11,605 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:17:11,605 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:17:11,607 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:17:11,607 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:17:11,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:17:11,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:17:11,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:17:11,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:17:11,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:17:11,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:17:11,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:17:11,612 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:17:11,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:17:11,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:17:11,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:17:11,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:17:11,616 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 [2023-03-31 22:17:11,652 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:17:11,652 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:17:11,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:17:11,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:17:11,653 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:17:11,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:17:11,654 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:17:11,654 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:17:11,654 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:17:11,654 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:17:11,655 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:17:11,655 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:17:11,655 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:17:11,655 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:17:11,655 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:17:11,655 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:17:11,655 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:17:11,656 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:17:11,656 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:17:11,656 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:17:11,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:17:11,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:17:11,657 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:17:11,657 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:17:11,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:17:11,657 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:17:11,657 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:17:11,657 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:17:11,657 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:17:11,657 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:17:11,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:17:11,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:17:11,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:17:11,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:17:11,658 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:17:11,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:17:11,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:17:11,659 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:17:11,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:17:11,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:17:11,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:17:11,659 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:17:11,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:17:11,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:17:11,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:17:11,912 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:17:11,912 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:17:11,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label31.c [2023-03-31 22:17:13,009 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:17:13,349 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:17:13,349 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label31.c [2023-03-31 22:17:13,377 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4ba1e81d/e6b9873d3d4948218393e2b7cc344733/FLAG2f1122f84 [2023-03-31 22:17:13,397 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4ba1e81d/e6b9873d3d4948218393e2b7cc344733 [2023-03-31 22:17:13,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:17:13,401 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:17:13,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:17:13,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:17:13,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:17:13,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:17:13" (1/1) ... [2023-03-31 22:17:13,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a5d386f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:13, skipping insertion in model container [2023-03-31 22:17:13,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:17:13" (1/1) ... [2023-03-31 22:17:13,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:17:13,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:17:13,689 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/Problem16_label31.c[1200,1213] [2023-03-31 22:17:14,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:17:14,057 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:17:14,069 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/Problem16_label31.c[1200,1213] [2023-03-31 22:17:14,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:17:14,257 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:17:14,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:14 WrapperNode [2023-03-31 22:17:14,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:17:14,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:17:14,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:17:14,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:17:14,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:14" (1/1) ... [2023-03-31 22:17:14,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:14" (1/1) ... [2023-03-31 22:17:14,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:14" (1/1) ... [2023-03-31 22:17:14,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:14" (1/1) ... [2023-03-31 22:17:14,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:14" (1/1) ... [2023-03-31 22:17:14,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:14" (1/1) ... [2023-03-31 22:17:14,398 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:14" (1/1) ... [2023-03-31 22:17:14,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:14" (1/1) ... [2023-03-31 22:17:14,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:17:14,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:17:14,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:17:14,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:17:14,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:14" (1/1) ... [2023-03-31 22:17:14,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:17:14,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:17:14,454 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) [2023-03-31 22:17:14,472 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 [2023-03-31 22:17:14,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:17:14,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:17:14,495 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:17:14,495 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:17:14,495 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:17:14,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:17:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:17:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:17:14,495 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:17:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:17:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:17:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:17:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:17:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:17:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:17:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:17:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:17:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:17:14,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:17:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:17:14,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:17:14,587 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:17:14,589 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:17:16,550 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:17:17,675 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:17:17,676 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:17:17,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:17:17 BoogieIcfgContainer [2023-03-31 22:17:17,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:17:17,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:17:17,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:17:17,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:17:17,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:17:13" (1/3) ... [2023-03-31 22:17:17,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552b214c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:17:17, skipping insertion in model container [2023-03-31 22:17:17,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:17:14" (2/3) ... [2023-03-31 22:17:17,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@552b214c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:17:17, skipping insertion in model container [2023-03-31 22:17:17,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:17:17" (3/3) ... [2023-03-31 22:17:17,689 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label31.c [2023-03-31 22:17:17,706 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:17:17,706 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:17:17,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:17:17,769 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;@26b0b9b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:17:17,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:17:17,775 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) [2023-03-31 22:17:17,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:17:17,782 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:17,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:17,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:17,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:17,792 INFO L85 PathProgramCache]: Analyzing trace with hash -510285171, now seen corresponding path program 1 times [2023-03-31 22:17:17,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:17,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953441705] [2023-03-31 22:17:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:17,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:17,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:17:18,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:18,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953441705] [2023-03-31 22:17:18,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953441705] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:18,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:18,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:17:18,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002927243] [2023-03-31 22:17:18,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:18,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:17:18,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:18,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:17:18,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:17:18,185 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) [2023-03-31 22:17:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:19,380 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-03-31 22:17:19,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:17:19,387 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 [2023-03-31 22:17:19,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:19,428 INFO L225 Difference]: With dead ends: 718 [2023-03-31 22:17:19,429 INFO L226 Difference]: Without dead ends: 471 [2023-03-31 22:17:19,435 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 [2023-03-31 22:17:19,439 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 235 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:19,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 60 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-03-31 22:17:19,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-03-31 22:17:19,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 463. [2023-03-31 22:17:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 453 states have (on average 1.9094922737306843) internal successors, (865), 453 states have internal predecessors, (865), 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) [2023-03-31 22:17:19,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 876 transitions. [2023-03-31 22:17:19,523 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 876 transitions. Word has length 11 [2023-03-31 22:17:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:19,523 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 876 transitions. [2023-03-31 22:17:19,524 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) [2023-03-31 22:17:19,524 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 876 transitions. [2023-03-31 22:17:19,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-03-31 22:17:19,525 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:19,525 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:19,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:17:19,526 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:19,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:19,526 INFO L85 PathProgramCache]: Analyzing trace with hash 777382180, now seen corresponding path program 1 times [2023-03-31 22:17:19,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:19,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247942197] [2023-03-31 22:17:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:19,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:17:19,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:19,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247942197] [2023-03-31 22:17:19,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247942197] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:19,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:19,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:17:19,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496394179] [2023-03-31 22:17:19,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:19,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:17:19,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:19,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:17:19,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:17:19,711 INFO L87 Difference]: Start difference. First operand 463 states and 876 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) [2023-03-31 22:17:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:21,130 INFO L93 Difference]: Finished difference Result 1395 states and 2674 transitions. [2023-03-31 22:17:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:17:21,131 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 [2023-03-31 22:17:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:21,140 INFO L225 Difference]: With dead ends: 1395 [2023-03-31 22:17:21,140 INFO L226 Difference]: Without dead ends: 937 [2023-03-31 22:17:21,143 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 [2023-03-31 22:17:21,144 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 891 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:21,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 43 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:17:21,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2023-03-31 22:17:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 918. [2023-03-31 22:17:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 900 states have (on average 1.7822222222222222) internal successors, (1604), 904 states have internal predecessors, (1604), 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) [2023-03-31 22:17:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1637 transitions. [2023-03-31 22:17:21,201 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1637 transitions. Word has length 21 [2023-03-31 22:17:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:21,202 INFO L495 AbstractCegarLoop]: Abstraction has 918 states and 1637 transitions. [2023-03-31 22:17:21,202 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) [2023-03-31 22:17:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1637 transitions. [2023-03-31 22:17:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 22:17:21,203 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:21,203 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] [2023-03-31 22:17:21,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:17:21,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:21,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:21,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1987342053, now seen corresponding path program 1 times [2023-03-31 22:17:21,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:21,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767358971] [2023-03-31 22:17:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:21,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:17:21,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:21,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767358971] [2023-03-31 22:17:21,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767358971] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:21,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:21,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:17:21,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680883985] [2023-03-31 22:17:21,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:21,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:17:21,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:21,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:17:21,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:17:21,303 INFO L87 Difference]: Start difference. First operand 918 states and 1637 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-03-31 22:17:22,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:22,669 INFO L93 Difference]: Finished difference Result 2537 states and 4578 transitions. [2023-03-31 22:17:22,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:17:22,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 24 [2023-03-31 22:17:22,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:22,681 INFO L225 Difference]: With dead ends: 2537 [2023-03-31 22:17:22,682 INFO L226 Difference]: Without dead ends: 1624 [2023-03-31 22:17:22,688 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 [2023-03-31 22:17:22,691 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 992 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:22,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:17:22,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2023-03-31 22:17:22,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1550. [2023-03-31 22:17:22,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1519 states have (on average 1.5023041474654377) internal successors, (2282), 1528 states have internal predecessors, (2282), 11 states have call successors, (11), 11 states have call predecessors, (11), 19 states have return successors, (67), 10 states have call predecessors, (67), 10 states have call successors, (67) [2023-03-31 22:17:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2360 transitions. [2023-03-31 22:17:22,761 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2360 transitions. Word has length 24 [2023-03-31 22:17:22,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:22,762 INFO L495 AbstractCegarLoop]: Abstraction has 1550 states and 2360 transitions. [2023-03-31 22:17:22,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2023-03-31 22:17:22,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2360 transitions. [2023-03-31 22:17:22,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-03-31 22:17:22,763 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:22,763 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] [2023-03-31 22:17:22,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:17:22,764 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:22,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:22,764 INFO L85 PathProgramCache]: Analyzing trace with hash -2078313901, now seen corresponding path program 1 times [2023-03-31 22:17:22,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:22,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328396604] [2023-03-31 22:17:22,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:22,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:17:22,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:22,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328396604] [2023-03-31 22:17:22,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328396604] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:22,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:22,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:17:22,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846074111] [2023-03-31 22:17:22,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:22,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:17:22,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:22,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:17:22,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:17:22,944 INFO L87 Difference]: Start difference. First operand 1550 states and 2360 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-03-31 22:17:24,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:24,609 INFO L93 Difference]: Finished difference Result 4442 states and 6841 transitions. [2023-03-31 22:17:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:17:24,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-03-31 22:17:24,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:24,629 INFO L225 Difference]: With dead ends: 4442 [2023-03-31 22:17:24,630 INFO L226 Difference]: Without dead ends: 2897 [2023-03-31 22:17:24,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:17:24,643 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 720 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 2043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:24,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 43 Invalid, 2043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-31 22:17:24,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2023-03-31 22:17:24,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2837. [2023-03-31 22:17:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2782 states have (on average 1.445003594536305) internal successors, (4020), 2803 states have internal predecessors, (4020), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (217), 16 states have call predecessors, (217), 16 states have call successors, (217) [2023-03-31 22:17:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 4254 transitions. [2023-03-31 22:17:24,774 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 4254 transitions. Word has length 28 [2023-03-31 22:17:24,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:24,775 INFO L495 AbstractCegarLoop]: Abstraction has 2837 states and 4254 transitions. [2023-03-31 22:17:24,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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) [2023-03-31 22:17:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 4254 transitions. [2023-03-31 22:17:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 22:17:24,776 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:24,777 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] [2023-03-31 22:17:24,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:17:24,777 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:24,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:24,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1109827480, now seen corresponding path program 1 times [2023-03-31 22:17:24,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:24,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523282367] [2023-03-31 22:17:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:24,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:17:24,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:24,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523282367] [2023-03-31 22:17:24,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523282367] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:17:24,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509148340] [2023-03-31 22:17:24,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:24,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:17:24,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:17:24,945 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) [2023-03-31 22:17:24,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:17:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:25,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:17:25,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:17:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:17:25,105 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:17:25,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509148340] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:25,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:17:25,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 22:17:25,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715181901] [2023-03-31 22:17:25,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:25,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:17:25,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:25,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:17:25,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:17:25,107 INFO L87 Difference]: Start difference. First operand 2837 states and 4254 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2023-03-31 22:17:26,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:26,106 INFO L93 Difference]: Finished difference Result 6986 states and 10600 transitions. [2023-03-31 22:17:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:17:26,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 43 [2023-03-31 22:17:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:26,132 INFO L225 Difference]: With dead ends: 6986 [2023-03-31 22:17:26,133 INFO L226 Difference]: Without dead ends: 4154 [2023-03-31 22:17:26,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:17:26,143 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 266 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:26,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 423 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-31 22:17:26,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2023-03-31 22:17:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3871. [2023-03-31 22:17:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3871 states, 3804 states have (on average 1.3656677181913774) internal successors, (5195), 3827 states have internal predecessors, (5195), 22 states have call successors, (22), 22 states have call predecessors, (22), 44 states have return successors, (299), 21 states have call predecessors, (299), 21 states have call successors, (299) [2023-03-31 22:17:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 5516 transitions. [2023-03-31 22:17:26,247 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 5516 transitions. Word has length 43 [2023-03-31 22:17:26,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:26,247 INFO L495 AbstractCegarLoop]: Abstraction has 3871 states and 5516 transitions. [2023-03-31 22:17:26,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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) [2023-03-31 22:17:26,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 5516 transitions. [2023-03-31 22:17:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-03-31 22:17:26,255 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:26,255 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] [2023-03-31 22:17:26,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:17:26,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:17:26,462 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:26,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:26,463 INFO L85 PathProgramCache]: Analyzing trace with hash 584112547, now seen corresponding path program 1 times [2023-03-31 22:17:26,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:26,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438816969] [2023-03-31 22:17:26,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:26,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:17:26,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:26,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438816969] [2023-03-31 22:17:26,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438816969] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:26,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:26,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:17:26,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492472220] [2023-03-31 22:17:26,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:26,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:17:26,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:17:26,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:17:26,586 INFO L87 Difference]: Start difference. First operand 3871 states and 5516 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-03-31 22:17:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:27,603 INFO L93 Difference]: Finished difference Result 8088 states and 11571 transitions. [2023-03-31 22:17:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:17:27,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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 52 [2023-03-31 22:17:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:27,619 INFO L225 Difference]: With dead ends: 8088 [2023-03-31 22:17:27,620 INFO L226 Difference]: Without dead ends: 4222 [2023-03-31 22:17:27,628 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 [2023-03-31 22:17:27,628 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 223 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:27,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 445 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-03-31 22:17:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2023-03-31 22:17:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 3366. [2023-03-31 22:17:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3304 states have (on average 1.291767554479419) internal successors, (4268), 3328 states have internal predecessors, (4268), 19 states have call successors, (19), 19 states have call predecessors, (19), 42 states have return successors, (197), 18 states have call predecessors, (197), 18 states have call successors, (197) [2023-03-31 22:17:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4484 transitions. [2023-03-31 22:17:27,704 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4484 transitions. Word has length 52 [2023-03-31 22:17:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:27,705 INFO L495 AbstractCegarLoop]: Abstraction has 3366 states and 4484 transitions. [2023-03-31 22:17:27,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2023-03-31 22:17:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4484 transitions. [2023-03-31 22:17:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-03-31 22:17:27,707 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:27,707 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-03-31 22:17:27,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 22:17:27,707 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:27,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:27,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1428299581, now seen corresponding path program 1 times [2023-03-31 22:17:27,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:27,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521197807] [2023-03-31 22:17:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:27,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:17:27,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:27,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521197807] [2023-03-31 22:17:27,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521197807] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:17:27,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116613262] [2023-03-31 22:17:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:27,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:17:27,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:17:27,933 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) [2023-03-31 22:17:27,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:17:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:28,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:17:28,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:17:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-03-31 22:17:28,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:17:28,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116613262] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:28,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:17:28,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-03-31 22:17:28,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140368444] [2023-03-31 22:17:28,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:28,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:17:28,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:28,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:17:28,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:17:28,076 INFO L87 Difference]: Start difference. First operand 3366 states and 4484 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-03-31 22:17:28,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:28,878 INFO L93 Difference]: Finished difference Result 6739 states and 8982 transitions. [2023-03-31 22:17:28,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:17:28,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 91 [2023-03-31 22:17:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:28,891 INFO L225 Difference]: With dead ends: 6739 [2023-03-31 22:17:28,891 INFO L226 Difference]: Without dead ends: 3378 [2023-03-31 22:17:28,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:17:28,898 INFO L413 NwaCegarLoop]: 407 mSDtfsCounter, 237 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:28,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 423 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 22:17:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3378 states. [2023-03-31 22:17:28,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3378 to 3170. [2023-03-31 22:17:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3111 states have (on average 1.2751526840244294) internal successors, (3967), 3134 states have internal predecessors, (3967), 18 states have call successors, (18), 18 states have call predecessors, (18), 40 states have return successors, (167), 17 states have call predecessors, (167), 17 states have call successors, (167) [2023-03-31 22:17:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 4152 transitions. [2023-03-31 22:17:28,972 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 4152 transitions. Word has length 91 [2023-03-31 22:17:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:28,973 INFO L495 AbstractCegarLoop]: Abstraction has 3170 states and 4152 transitions. [2023-03-31 22:17:28,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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) [2023-03-31 22:17:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 4152 transitions. [2023-03-31 22:17:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-03-31 22:17:28,975 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:28,975 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, 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] [2023-03-31 22:17:28,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 22:17:29,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-03-31 22:17:29,182 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:29,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash -460461945, now seen corresponding path program 1 times [2023-03-31 22:17:29,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:29,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002625007] [2023-03-31 22:17:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:29,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:17:29,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:29,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002625007] [2023-03-31 22:17:29,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002625007] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:29,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:29,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:17:29,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324618681] [2023-03-31 22:17:29,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:29,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:17:29,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:29,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:17:29,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:17:29,352 INFO L87 Difference]: Start difference. First operand 3170 states and 4152 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-03-31 22:17:30,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:30,400 INFO L93 Difference]: Finished difference Result 7893 states and 10312 transitions. [2023-03-31 22:17:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:17:30,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 114 [2023-03-31 22:17:30,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:30,419 INFO L225 Difference]: With dead ends: 7893 [2023-03-31 22:17:30,420 INFO L226 Difference]: Without dead ends: 4728 [2023-03-31 22:17:30,426 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 [2023-03-31 22:17:30,428 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 223 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:30,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 482 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-03-31 22:17:30,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4728 states. [2023-03-31 22:17:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4728 to 4029. [2023-03-31 22:17:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4029 states, 3959 states have (on average 1.2366759282647133) internal successors, (4896), 3985 states have internal predecessors, (4896), 22 states have call successors, (22), 22 states have call predecessors, (22), 47 states have return successors, (224), 21 states have call predecessors, (224), 21 states have call successors, (224) [2023-03-31 22:17:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4029 states to 4029 states and 5142 transitions. [2023-03-31 22:17:30,532 INFO L78 Accepts]: Start accepts. Automaton has 4029 states and 5142 transitions. Word has length 114 [2023-03-31 22:17:30,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:30,534 INFO L495 AbstractCegarLoop]: Abstraction has 4029 states and 5142 transitions. [2023-03-31 22:17:30,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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) [2023-03-31 22:17:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4029 states and 5142 transitions. [2023-03-31 22:17:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-03-31 22:17:30,537 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:30,537 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:17:30,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 22:17:30,537 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:30,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:30,542 INFO L85 PathProgramCache]: Analyzing trace with hash 471965264, now seen corresponding path program 1 times [2023-03-31 22:17:30,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:30,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463964075] [2023-03-31 22:17:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:30,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:17:30,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:30,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463964075] [2023-03-31 22:17:30,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463964075] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:30,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:30,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:17:30,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558798077] [2023-03-31 22:17:30,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:30,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:17:30,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:30,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:17:30,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:17:30,849 INFO L87 Difference]: Start difference. First operand 4029 states and 5142 transitions. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 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) [2023-03-31 22:17:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:32,216 INFO L93 Difference]: Finished difference Result 9880 states and 12817 transitions. [2023-03-31 22:17:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:17:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 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 175 [2023-03-31 22:17:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:32,237 INFO L225 Difference]: With dead ends: 9880 [2023-03-31 22:17:32,238 INFO L226 Difference]: Without dead ends: 5856 [2023-03-31 22:17:32,246 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 [2023-03-31 22:17:32,247 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 474 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:32,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 43 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-03-31 22:17:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5856 states. [2023-03-31 22:17:32,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5856 to 5540. [2023-03-31 22:17:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5540 states, 5438 states have (on average 1.2408973887458625) internal successors, (6748), 5482 states have internal predecessors, (6748), 29 states have call successors, (29), 29 states have call predecessors, (29), 72 states have return successors, (427), 28 states have call predecessors, (427), 28 states have call successors, (427) [2023-03-31 22:17:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 7204 transitions. [2023-03-31 22:17:32,367 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 7204 transitions. Word has length 175 [2023-03-31 22:17:32,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:32,368 INFO L495 AbstractCegarLoop]: Abstraction has 5540 states and 7204 transitions. [2023-03-31 22:17:32,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 4 states have internal predecessors, (169), 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) [2023-03-31 22:17:32,369 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 7204 transitions. [2023-03-31 22:17:32,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2023-03-31 22:17:32,374 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:32,374 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2023-03-31 22:17:32,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 22:17:32,374 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:32,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash 204498855, now seen corresponding path program 1 times [2023-03-31 22:17:32,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:32,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390037547] [2023-03-31 22:17:32,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:32,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:17:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-03-31 22:17:32,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:17:32,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390037547] [2023-03-31 22:17:32,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390037547] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:17:32,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:17:32,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:17:32,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999562767] [2023-03-31 22:17:32,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:17:32,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:17:32,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:17:32,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:17:32,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:17:32,726 INFO L87 Difference]: Start difference. First operand 5540 states and 7204 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2023-03-31 22:17:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:17:33,622 INFO L93 Difference]: Finished difference Result 12436 states and 16135 transitions. [2023-03-31 22:17:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:17:33,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 227 [2023-03-31 22:17:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:17:33,644 INFO L225 Difference]: With dead ends: 12436 [2023-03-31 22:17:33,644 INFO L226 Difference]: Without dead ends: 6901 [2023-03-31 22:17:33,657 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 [2023-03-31 22:17:33,657 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 241 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 22:17:33,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 205 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 22:17:33,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2023-03-31 22:17:33,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 6631. [2023-03-31 22:17:33,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6631 states, 6517 states have (on average 1.2160503299063987) internal successors, (7925), 6563 states have internal predecessors, (7925), 34 states have call successors, (34), 34 states have call predecessors, (34), 79 states have return successors, (505), 33 states have call predecessors, (505), 33 states have call successors, (505) [2023-03-31 22:17:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6631 states to 6631 states and 8464 transitions. [2023-03-31 22:17:33,802 INFO L78 Accepts]: Start accepts. Automaton has 6631 states and 8464 transitions. Word has length 227 [2023-03-31 22:17:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:17:33,803 INFO L495 AbstractCegarLoop]: Abstraction has 6631 states and 8464 transitions. [2023-03-31 22:17:33,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2023-03-31 22:17:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 6631 states and 8464 transitions. [2023-03-31 22:17:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2023-03-31 22:17:33,809 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:17:33,810 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-03-31 22:17:33,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 22:17:33,810 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:17:33,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:17:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1431896158, now seen corresponding path program 1 times [2023-03-31 22:17:33,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:17:33,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94480455] [2023-03-31 22:17:33,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:17:33,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:17:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat