/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem13_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:06:09,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:06:09,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:06:09,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:06:09,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:06:09,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:06:09,615 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:06:09,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:06:09,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:06:09,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:06:09,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:06:09,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:06:09,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:06:09,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:06:09,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:06:09,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:06:09,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:06:09,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:06:09,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:06:09,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:06:09,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:06:09,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:06:09,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:06:09,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:06:09,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:06:09,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:06:09,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:06:09,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:06:09,635 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:06:09,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:06:09,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:06:09,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:06:09,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:06:09,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:06:09,637 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:06:09,638 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:06:09,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:06:09,668 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:06:09,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:06:09,668 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:06:09,668 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:06:09,669 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:06:09,669 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:06:09,669 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:06:09,669 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:06:09,669 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:06:09,669 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:06:09,669 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:06:09,669 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:06:09,670 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:06:09,670 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:06:09,670 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:06:09,670 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:06:09,670 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:06:09,670 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:06:09,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:06:09,671 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:06:09,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:06:09,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:06:09,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:06:09,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:06:09,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:06:09,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:06:09,671 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:06:09,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:06:09,672 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:06:09,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:06:09,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:06:09,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:06:09,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:06:09,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:06:09,672 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:06:09,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:06:09,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:06:09,673 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:06:09,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:06:09,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:06:09,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:06:09,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:06:09,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:06:09,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:06:09,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:06:09,898 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:06:09,898 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:06:09,899 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label34.c [2023-04-01 04:06:11,042 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:06:11,422 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:06:11,423 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label34.c [2023-04-01 04:06:11,447 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a36d597/6711185612b1420eb6d295a192a9c606/FLAGd543dca0a [2023-04-01 04:06:11,461 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4a36d597/6711185612b1420eb6d295a192a9c606 [2023-04-01 04:06:11,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:06:11,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:06:11,470 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:06:11,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:06:11,473 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:06:11,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:06:11" (1/1) ... [2023-04-01 04:06:11,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b3a8038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:11, skipping insertion in model container [2023-04-01 04:06:11,475 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:06:11" (1/1) ... [2023-04-01 04:06:11,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:06:11,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:06:11,877 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label34.c[7959,7972] [2023-04-01 04:06:12,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:06:12,508 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:06:12,535 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label34.c[7959,7972] [2023-04-01 04:06:12,883 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:06:12,905 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:06:12,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:12 WrapperNode [2023-04-01 04:06:12,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:06:12,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:06:12,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:06:12,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:06:12,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:12" (1/1) ... [2023-04-01 04:06:12,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:12" (1/1) ... [2023-04-01 04:06:12,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:12" (1/1) ... [2023-04-01 04:06:12,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:12" (1/1) ... [2023-04-01 04:06:13,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:12" (1/1) ... [2023-04-01 04:06:13,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:12" (1/1) ... [2023-04-01 04:06:13,121 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:12" (1/1) ... [2023-04-01 04:06:13,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:12" (1/1) ... [2023-04-01 04:06:13,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:06:13,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:06:13,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:06:13,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:06:13,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:12" (1/1) ... [2023-04-01 04:06:13,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:06:13,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:06:13,217 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:06:13,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:06:13,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:06:13,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:06:13,259 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:06:13,259 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:06:13,259 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:06:13,259 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:06:13,259 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:06:13,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:06:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:06:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:06:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:06:13,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:06:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:06:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:06:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:06:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:06:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:06:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:06:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:06:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:06:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:06:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:06:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:06:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:06:13,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:06:13,335 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:06:13,337 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:06:17,289 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:06:19,717 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:06:19,718 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:06:19,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:06:19 BoogieIcfgContainer [2023-04-01 04:06:19,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:06:19,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:06:19,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:06:19,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:06:19,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:06:11" (1/3) ... [2023-04-01 04:06:19,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c613e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:06:19, skipping insertion in model container [2023-04-01 04:06:19,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:06:12" (2/3) ... [2023-04-01 04:06:19,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c613e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:06:19, skipping insertion in model container [2023-04-01 04:06:19,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:06:19" (3/3) ... [2023-04-01 04:06:19,727 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label34.c [2023-04-01 04:06:19,741 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:06:19,741 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:06:19,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:06:19,810 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;@240d0328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:06:19,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:06:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:06:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:06:19,820 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:19,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:19,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:19,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:19,825 INFO L85 PathProgramCache]: Analyzing trace with hash -330927308, now seen corresponding path program 1 times [2023-04-01 04:06:19,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:19,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122561274] [2023-04-01 04:06:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:19,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:06:20,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:20,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122561274] [2023-04-01 04:06:20,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122561274] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:20,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:06:20,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:06:20,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104452789] [2023-04-01 04:06:20,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:20,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:06:20,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:20,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:06:20,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:06:20,123 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:06:23,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:23,308 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:06:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:06:23,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:06:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:23,340 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:06:23,340 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:06:23,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:06:23,357 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 735 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:23,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 178 Invalid, 2803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 04:06:23,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:06:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-04-01 04:06:23,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1347 states have (on average 1.8574610244988865) internal successors, (2502), 1347 states have internal predecessors, (2502), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:06:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2525 transitions. [2023-04-01 04:06:23,469 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2525 transitions. Word has length 11 [2023-04-01 04:06:23,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:23,470 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2525 transitions. [2023-04-01 04:06:23,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:06:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2525 transitions. [2023-04-01 04:06:23,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:06:23,472 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:23,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:23,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:06:23,473 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:23,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:23,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2131262676, now seen corresponding path program 1 times [2023-04-01 04:06:23,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:23,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443263865] [2023-04-01 04:06:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:23,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:06:23,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:23,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443263865] [2023-04-01 04:06:23,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443263865] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:23,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:06:23,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:06:23,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224256795] [2023-04-01 04:06:23,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:23,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:06:23,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:23,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:06:23,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:06:23,638 INFO L87 Difference]: Start difference. First operand 1365 states and 2525 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:06:27,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:27,111 INFO L93 Difference]: Finished difference Result 4150 states and 7698 transitions. [2023-04-01 04:06:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:06:27,112 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-04-01 04:06:27,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:27,124 INFO L225 Difference]: With dead ends: 4150 [2023-04-01 04:06:27,124 INFO L226 Difference]: Without dead ends: 2790 [2023-04-01 04:06:27,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:06:27,134 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2455 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3743 mSolverCounterSat, 1165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2455 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 4908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1165 IncrementalHoareTripleChecker+Valid, 3743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:27,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2455 Valid, 109 Invalid, 4908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1165 Valid, 3743 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 04:06:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2790 states. [2023-04-01 04:06:27,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2790 to 2749. [2023-04-01 04:06:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2702 states have (on average 1.5906735751295338) internal successors, (4298), 2708 states have internal predecessors, (4298), 15 states have call successors, (15), 15 states have call predecessors, (15), 31 states have return successors, (79), 25 states have call predecessors, (79), 14 states have call successors, (79) [2023-04-01 04:06:27,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 4392 transitions. [2023-04-01 04:06:27,212 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 4392 transitions. Word has length 21 [2023-04-01 04:06:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:27,213 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 4392 transitions. [2023-04-01 04:06:27,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:06:27,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 4392 transitions. [2023-04-01 04:06:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:06:27,214 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:27,214 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:27,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:06:27,214 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:27,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:27,215 INFO L85 PathProgramCache]: Analyzing trace with hash 839129136, now seen corresponding path program 1 times [2023-04-01 04:06:27,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:27,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822815067] [2023-04-01 04:06:27,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:27,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:06:27,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:27,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822815067] [2023-04-01 04:06:27,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822815067] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:27,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:06:27,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:06:27,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309552468] [2023-04-01 04:06:27,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:27,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:06:27,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:27,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:06:27,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:06:27,373 INFO L87 Difference]: Start difference. First operand 2749 states and 4392 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:06:32,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:32,079 INFO L93 Difference]: Finished difference Result 8429 states and 13621 transitions. [2023-04-01 04:06:32,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:06:32,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-04-01 04:06:32,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:32,105 INFO L225 Difference]: With dead ends: 8429 [2023-04-01 04:06:32,105 INFO L226 Difference]: Without dead ends: 5685 [2023-04-01 04:06:32,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:06:32,114 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2178 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4872 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2178 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 5731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 4872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:32,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2178 Valid, 134 Invalid, 5731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 4872 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 04:06:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5685 states. [2023-04-01 04:06:32,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5685 to 5634. [2023-04-01 04:06:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5490 states have (on average 1.3936247723132968) internal successors, (7651), 5522 states have internal predecessors, (7651), 27 states have call successors, (27), 27 states have call predecessors, (27), 116 states have return successors, (373), 84 states have call predecessors, (373), 26 states have call successors, (373) [2023-04-01 04:06:32,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 8051 transitions. [2023-04-01 04:06:32,247 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 8051 transitions. Word has length 23 [2023-04-01 04:06:32,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:32,248 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 8051 transitions. [2023-04-01 04:06:32,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:06:32,248 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 8051 transitions. [2023-04-01 04:06:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:06:32,249 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:32,249 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:32,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:06:32,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:32,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:32,251 INFO L85 PathProgramCache]: Analyzing trace with hash -177662592, now seen corresponding path program 1 times [2023-04-01 04:06:32,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:32,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270122093] [2023-04-01 04:06:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:32,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:06:32,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:32,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270122093] [2023-04-01 04:06:32,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270122093] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:06:32,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300924149] [2023-04-01 04:06:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:32,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:06:32,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:06:32,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:06:32,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:06:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:32,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:06:32,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:06:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:06:32,622 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:06:32,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300924149] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:32,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:06:32,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:06:32,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569706471] [2023-04-01 04:06:32,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:32,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:06:32,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:32,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:06:32,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:06:32,623 INFO L87 Difference]: Start difference. First operand 5634 states and 8051 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:06:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:36,959 INFO L93 Difference]: Finished difference Result 17148 states and 25308 transitions. [2023-04-01 04:06:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:06:36,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2023-04-01 04:06:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:37,005 INFO L225 Difference]: With dead ends: 17148 [2023-04-01 04:06:37,005 INFO L226 Difference]: Without dead ends: 11519 [2023-04-01 04:06:37,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:06:37,021 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2040 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4472 mSolverCounterSat, 1062 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2040 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1062 IncrementalHoareTripleChecker+Valid, 4472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:37,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2040 Valid, 103 Invalid, 5534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1062 Valid, 4472 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-01 04:06:37,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11519 states. [2023-04-01 04:06:37,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11519 to 10645. [2023-04-01 04:06:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10645 states, 10328 states have (on average 1.2570681642137878) internal successors, (12983), 10410 states have internal predecessors, (12983), 49 states have call successors, (49), 49 states have call predecessors, (49), 267 states have return successors, (1161), 185 states have call predecessors, (1161), 48 states have call successors, (1161) [2023-04-01 04:06:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10645 states to 10645 states and 14193 transitions. [2023-04-01 04:06:37,244 INFO L78 Accepts]: Start accepts. Automaton has 10645 states and 14193 transitions. Word has length 41 [2023-04-01 04:06:37,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:37,245 INFO L495 AbstractCegarLoop]: Abstraction has 10645 states and 14193 transitions. [2023-04-01 04:06:37,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:06:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand 10645 states and 14193 transitions. [2023-04-01 04:06:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 04:06:37,252 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:37,252 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:37,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:06:37,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:06:37,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:37,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:37,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1633504978, now seen corresponding path program 1 times [2023-04-01 04:06:37,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:37,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756679657] [2023-04-01 04:06:37,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:37,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:37,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:06:37,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:37,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756679657] [2023-04-01 04:06:37,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756679657] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:37,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:06:37,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 04:06:37,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205307046] [2023-04-01 04:06:37,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:37,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 04:06:37,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:37,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 04:06:37,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:06:37,870 INFO L87 Difference]: Start difference. First operand 10645 states and 14193 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:06:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:43,496 INFO L93 Difference]: Finished difference Result 29200 states and 41948 transitions. [2023-04-01 04:06:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:06:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2023-04-01 04:06:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:43,554 INFO L225 Difference]: With dead ends: 29200 [2023-04-01 04:06:43,554 INFO L226 Difference]: Without dead ends: 18945 [2023-04-01 04:06:43,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:06:43,575 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 6226 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 3264 mSolverCounterSat, 3157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6230 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 6421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3157 IncrementalHoareTripleChecker+Valid, 3264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:43,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6230 Valid, 74 Invalid, 6421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3157 Valid, 3264 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-04-01 04:06:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18945 states. [2023-04-01 04:06:43,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18945 to 16109. [2023-04-01 04:06:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16109 states, 15658 states have (on average 1.2280623323540683) internal successors, (19229), 15774 states have internal predecessors, (19229), 76 states have call successors, (76), 76 states have call predecessors, (76), 374 states have return successors, (2502), 258 states have call predecessors, (2502), 75 states have call successors, (2502) [2023-04-01 04:06:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16109 states to 16109 states and 21807 transitions. [2023-04-01 04:06:43,870 INFO L78 Accepts]: Start accepts. Automaton has 16109 states and 21807 transitions. Word has length 70 [2023-04-01 04:06:43,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:43,873 INFO L495 AbstractCegarLoop]: Abstraction has 16109 states and 21807 transitions. [2023-04-01 04:06:43,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:06:43,873 INFO L276 IsEmpty]: Start isEmpty. Operand 16109 states and 21807 transitions. [2023-04-01 04:06:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-04-01 04:06:43,886 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:43,887 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:43,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:06:43,887 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:43,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:43,888 INFO L85 PathProgramCache]: Analyzing trace with hash 343546146, now seen corresponding path program 1 times [2023-04-01 04:06:43,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:43,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392267207] [2023-04-01 04:06:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:43,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 78 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-04-01 04:06:44,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:44,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392267207] [2023-04-01 04:06:44,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392267207] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:06:44,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579381828] [2023-04-01 04:06:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:44,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:06:44,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:06:44,373 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:06:44,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:06:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:44,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 04:06:44,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:06:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-01 04:06:44,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:06:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2023-04-01 04:06:45,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579381828] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:06:45,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:06:45,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-04-01 04:06:45,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284770506] [2023-04-01 04:06:45,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:45,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:06:45,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:45,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:06:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:06:45,481 INFO L87 Difference]: Start difference. First operand 16109 states and 21807 transitions. Second operand has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:06:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:49,164 INFO L93 Difference]: Finished difference Result 46773 states and 66629 transitions. [2023-04-01 04:06:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:06:49,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 230 [2023-04-01 04:06:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:49,261 INFO L225 Difference]: With dead ends: 46773 [2023-04-01 04:06:49,261 INFO L226 Difference]: Without dead ends: 31054 [2023-04-01 04:06:49,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 452 SyntacticMatches, 9 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-04-01 04:06:49,292 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 2169 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 3534 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2169 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 4393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 3534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:49,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2169 Valid, 86 Invalid, 4393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 3534 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 04:06:49,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31054 states. [2023-04-01 04:06:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31054 to 30343. [2023-04-01 04:06:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30343 states, 29334 states have (on average 1.1931206108952068) internal successors, (34999), 29644 states have internal predecessors, (34999), 138 states have call successors, (138), 138 states have call predecessors, (138), 870 states have return successors, (6329), 560 states have call predecessors, (6329), 137 states have call successors, (6329) [2023-04-01 04:06:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30343 states to 30343 states and 41466 transitions. [2023-04-01 04:06:49,877 INFO L78 Accepts]: Start accepts. Automaton has 30343 states and 41466 transitions. Word has length 230 [2023-04-01 04:06:49,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:49,878 INFO L495 AbstractCegarLoop]: Abstraction has 30343 states and 41466 transitions. [2023-04-01 04:06:49,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.0) internal successors, (165), 4 states have internal predecessors, (165), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:06:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 30343 states and 41466 transitions. [2023-04-01 04:06:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-04-01 04:06:49,892 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:49,892 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:49,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:06:50,101 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,SelfDestructingSolverStorable5 [2023-04-01 04:06:50,102 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:50,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:50,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1262684792, now seen corresponding path program 1 times [2023-04-01 04:06:50,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:50,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893042645] [2023-04-01 04:06:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:50,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 104 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 04:06:51,267 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:51,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893042645] [2023-04-01 04:06:51,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893042645] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:06:51,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171564729] [2023-04-01 04:06:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:51,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:06:51,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:06:51,269 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:06:51,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:06:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:51,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:06:51,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:06:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-04-01 04:06:51,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:06:51,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171564729] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:06:51,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:06:51,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 04:06:51,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660979594] [2023-04-01 04:06:51,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:06:51,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:06:51,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:06:51,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:06:51,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:06:51,455 INFO L87 Difference]: Start difference. First operand 30343 states and 41466 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:06:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:06:54,762 INFO L93 Difference]: Finished difference Result 71201 states and 101555 transitions. [2023-04-01 04:06:54,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:06:54,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 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 255 [2023-04-01 04:06:54,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:06:54,883 INFO L225 Difference]: With dead ends: 71201 [2023-04-01 04:06:54,883 INFO L226 Difference]: Without dead ends: 41248 [2023-04-01 04:06:54,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-04-01 04:06:54,949 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 707 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 2129 mSolverCounterSat, 799 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 707 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 2928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 799 IncrementalHoareTripleChecker+Valid, 2129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:06:54,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [707 Valid, 383 Invalid, 2928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [799 Valid, 2129 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:06:54,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41248 states. [2023-04-01 04:06:55,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41248 to 40835. [2023-04-01 04:06:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40835 states, 39654 states have (on average 1.197357139254552) internal successors, (47480), 40009 states have internal predecessors, (47480), 186 states have call successors, (186), 186 states have call predecessors, (186), 994 states have return successors, (9603), 639 states have call predecessors, (9603), 185 states have call successors, (9603) [2023-04-01 04:06:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40835 states to 40835 states and 57269 transitions. [2023-04-01 04:06:55,881 INFO L78 Accepts]: Start accepts. Automaton has 40835 states and 57269 transitions. Word has length 255 [2023-04-01 04:06:55,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:06:55,881 INFO L495 AbstractCegarLoop]: Abstraction has 40835 states and 57269 transitions. [2023-04-01 04:06:55,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:06:55,882 INFO L276 IsEmpty]: Start isEmpty. Operand 40835 states and 57269 transitions. [2023-04-01 04:06:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2023-04-01 04:06:55,907 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:06:55,907 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:06:55,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 04:06:56,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:06:56,114 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:06:56,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:06:56,115 INFO L85 PathProgramCache]: Analyzing trace with hash -793764105, now seen corresponding path program 1 times [2023-04-01 04:06:56,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:06:56,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786655932] [2023-04-01 04:06:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:56,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:06:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:57,270 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 104 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 04:06:57,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:06:57,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786655932] [2023-04-01 04:06:57,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786655932] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:06:57,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629867172] [2023-04-01 04:06:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:06:57,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:06:57,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:06:57,272 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:06:57,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:06:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:06:57,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 04:06:57,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:06:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 04:06:57,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:06:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-04-01 04:06:58,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629867172] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:06:58,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1409223834] [2023-04-01 04:06:58,260 INFO L159 IcfgInterpreter]: Started Sifa with 220 locations of interest [2023-04-01 04:06:58,260 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:06:58,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:06:58,268 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:06:58,268 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:06:58,387 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 04:06:59,079 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 50