/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem06_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:39:44,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:39:44,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:39:44,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:39:44,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:39:44,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:39:44,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:39:44,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:39:44,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:39:44,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:39:44,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:39:44,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:39:44,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:39:44,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:39:44,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:39:44,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:39:44,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:39:44,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:39:44,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:39:44,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:39:44,486 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:39:44,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:39:44,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:39:44,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:39:44,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:39:44,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:39:44,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:39:44,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:39:44,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:39:44,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:39:44,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:39:44,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:39:44,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:39:44,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:39:44,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:39:44,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:39:44,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:39:44,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:39:44,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:39:44,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:39:44,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:39:44,507 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 09:39:44,531 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:39:44,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:39:44,531 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:39:44,531 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:39:44,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:39:44,532 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:39:44,532 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:39:44,532 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:39:44,532 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:39:44,532 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:39:44,533 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:39:44,533 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:39:44,533 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:39:44,533 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:39:44,533 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:39:44,533 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:39:44,534 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:39:44,534 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:39:44,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:39:44,534 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:39:44,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:39:44,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:39:44,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:39:44,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:39:44,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:39:44,535 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:39:44,535 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:39:44,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:39:44,535 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:39:44,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:39:44,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:39:44,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:39:44,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:39:44,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:39:44,536 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:39:44,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:39:44,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:39:44,536 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:39:44,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:39:44,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:39:44,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:39:44,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:39:44,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:39:44,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:39:44,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:39:44,741 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:39:44,741 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:39:44,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem06_label58.c [2023-04-01 09:39:45,724 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:39:46,156 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:39:46,157 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem06_label58.c [2023-04-01 09:39:46,196 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3cc6bc39/ed8d6f7932a1462aa0687c7a53fc47c2/FLAG008879929 [2023-04-01 09:39:46,292 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3cc6bc39/ed8d6f7932a1462aa0687c7a53fc47c2 [2023-04-01 09:39:46,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:39:46,295 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:39:46,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:39:46,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:39:46,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:39:46,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:39:46" (1/1) ... [2023-04-01 09:39:46,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3162af5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:39:46, skipping insertion in model container [2023-04-01 09:39:46,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:39:46" (1/1) ... [2023-04-01 09:39:46,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:39:46,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:39:47,565 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/Problem06_label58.c[333300,333313] [2023-04-01 09:39:47,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:39:47,593 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:39:48,245 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/Problem06_label58.c[333300,333313] [2023-04-01 09:39:48,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:39:48,284 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:39:48,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:39:48 WrapperNode [2023-04-01 09:39:48,284 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:39:48,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:39:48,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:39:48,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:39:48,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:39:48" (1/1) ... [2023-04-01 09:39:48,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:39:48" (1/1) ... [2023-04-01 09:39:48,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:39:48" (1/1) ... [2023-04-01 09:39:48,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:39:48" (1/1) ... [2023-04-01 09:39:48,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:39:48" (1/1) ... [2023-04-01 09:39:48,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:39:48" (1/1) ... [2023-04-01 09:39:48,539 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:39:48" (1/1) ... [2023-04-01 09:39:48,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:39:48" (1/1) ... [2023-04-01 09:39:48,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:39:48,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:39:48,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:39:48,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:39:48,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:39:48" (1/1) ... [2023-04-01 09:39:48,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:39:48,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:39:48,664 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 09:39:48,666 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 09:39:48,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:39:48,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:39:48,693 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:39:48,693 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:39:48,693 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 09:39:48,693 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 09:39:48,693 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 09:39:48,693 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 09:39:48,694 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:39:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:39:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 09:39:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 09:39:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 09:39:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 09:39:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:39:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:39:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:39:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:39:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:39:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:39:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:39:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:39:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:39:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:39:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:39:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:39:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:39:48,763 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:39:48,764 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:39:53,209 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:39:53,851 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:39:53,851 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:39:53,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:39:53 BoogieIcfgContainer [2023-04-01 09:39:53,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:39:53,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:39:53,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:39:53,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:39:53,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:39:46" (1/3) ... [2023-04-01 09:39:53,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13802b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:39:53, skipping insertion in model container [2023-04-01 09:39:53,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:39:48" (2/3) ... [2023-04-01 09:39:53,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13802b5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:39:53, skipping insertion in model container [2023-04-01 09:39:53,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:39:53" (3/3) ... [2023-04-01 09:39:53,860 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem06_label58.c [2023-04-01 09:39:53,876 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:39:53,876 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:39:53,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:39:53,946 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;@2379a14a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:39:53,946 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:39:53,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 964 states, 948 states have (on average 1.978902953586498) internal successors, (1876), 949 states have internal predecessors, (1876), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 09:39:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 944 [2023-04-01 09:39:53,990 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:39:53,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:39:53,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:39:53,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:39:53,997 INFO L85 PathProgramCache]: Analyzing trace with hash 22928715, now seen corresponding path program 1 times [2023-04-01 09:39:54,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:39:54,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565364353] [2023-04-01 09:39:54,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:39:54,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:39:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:39:58,330 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 09:39:58,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:39:58,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565364353] [2023-04-01 09:39:58,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565364353] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:39:58,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:39:58,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:39:58,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143593694] [2023-04-01 09:39:58,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:39:58,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:39:58,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:39:58,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:39:58,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:39:58,365 INFO L87 Difference]: Start difference. First operand has 964 states, 948 states have (on average 1.978902953586498) internal successors, (1876), 949 states have internal predecessors, (1876), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 2 states have internal predecessors, (935), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:40:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:40:01,762 INFO L93 Difference]: Finished difference Result 2880 states and 5678 transitions. [2023-04-01 09:40:01,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:40:01,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 2 states have internal predecessors, (935), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 943 [2023-04-01 09:40:01,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:40:01,846 INFO L225 Difference]: With dead ends: 2880 [2023-04-01 09:40:01,846 INFO L226 Difference]: Without dead ends: 1913 [2023-04-01 09:40:01,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 09:40:01,858 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 180 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 2982 mSolverCounterSat, 768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 3750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 2982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 09:40:01,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 471 Invalid, 3750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [768 Valid, 2982 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 09:40:01,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2023-04-01 09:40:01,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1913. [2023-04-01 09:40:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1889 states have (on average 1.7358390682901006) internal successors, (3279), 1889 states have internal predecessors, (3279), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (21), 11 states have call predecessors, (21), 11 states have call successors, (21) [2023-04-01 09:40:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 3312 transitions. [2023-04-01 09:40:01,967 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 3312 transitions. Word has length 943 [2023-04-01 09:40:01,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:40:01,970 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 3312 transitions. [2023-04-01 09:40:01,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.6666666666667) internal successors, (935), 2 states have internal predecessors, (935), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:40:01,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 3312 transitions. [2023-04-01 09:40:02,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2023-04-01 09:40:02,024 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:40:02,024 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:40:02,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:40:02,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:40:02,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:40:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash 822150084, now seen corresponding path program 1 times [2023-04-01 09:40:02,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:40:02,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058862006] [2023-04-01 09:40:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:40:02,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:40:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:40:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:40:03,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:40:03,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058862006] [2023-04-01 09:40:03,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058862006] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:40:03,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:40:03,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:40:03,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868032280] [2023-04-01 09:40:03,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:40:03,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:40:03,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:40:03,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:40:03,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:40:03,558 INFO L87 Difference]: Start difference. First operand 1913 states and 3312 transitions. Second operand has 5 states, 5 states have (on average 189.0) internal successors, (945), 4 states have internal predecessors, (945), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:40:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:40:07,737 INFO L93 Difference]: Finished difference Result 5863 states and 10171 transitions. [2023-04-01 09:40:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:40:07,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 189.0) internal successors, (945), 4 states have internal predecessors, (945), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 955 [2023-04-01 09:40:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:40:07,753 INFO L225 Difference]: With dead ends: 5863 [2023-04-01 09:40:07,754 INFO L226 Difference]: Without dead ends: 3955 [2023-04-01 09:40:07,759 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 09:40:07,760 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 3667 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 5326 mSolverCounterSat, 1750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3667 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 7076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1750 IncrementalHoareTripleChecker+Valid, 5326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 09:40:07,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3667 Valid, 186 Invalid, 7076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1750 Valid, 5326 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 09:40:07,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3955 states. [2023-04-01 09:40:07,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3955 to 3876. [2023-04-01 09:40:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3876 states, 3811 states have (on average 1.564156389399108) internal successors, (5961), 3817 states have internal predecessors, (5961), 22 states have call successors, (22), 22 states have call predecessors, (22), 42 states have return successors, (117), 36 states have call predecessors, (117), 21 states have call successors, (117) [2023-04-01 09:40:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3876 states to 3876 states and 6100 transitions. [2023-04-01 09:40:07,858 INFO L78 Accepts]: Start accepts. Automaton has 3876 states and 6100 transitions. Word has length 955 [2023-04-01 09:40:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:40:07,858 INFO L495 AbstractCegarLoop]: Abstraction has 3876 states and 6100 transitions. [2023-04-01 09:40:07,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 189.0) internal successors, (945), 4 states have internal predecessors, (945), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:40:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3876 states and 6100 transitions. [2023-04-01 09:40:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2023-04-01 09:40:07,880 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:40:07,880 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:40:07,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:40:07,881 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:40:07,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:40:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash 814280877, now seen corresponding path program 1 times [2023-04-01 09:40:07,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:40:07,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064702024] [2023-04-01 09:40:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:40:07,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:40:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:40:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:40:09,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:40:09,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064702024] [2023-04-01 09:40:09,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064702024] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:40:09,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:40:09,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:40:09,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760688379] [2023-04-01 09:40:09,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:40:09,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:40:09,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:40:09,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:40:09,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:40:09,174 INFO L87 Difference]: Start difference. First operand 3876 states and 6100 transitions. Second operand has 5 states, 5 states have (on average 190.6) internal successors, (953), 4 states have internal predecessors, (953), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:40:13,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:40:13,143 INFO L93 Difference]: Finished difference Result 12082 states and 19398 transitions. [2023-04-01 09:40:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:40:13,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 190.6) internal successors, (953), 4 states have internal predecessors, (953), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 963 [2023-04-01 09:40:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:40:13,177 INFO L225 Difference]: With dead ends: 12082 [2023-04-01 09:40:13,178 INFO L226 Difference]: Without dead ends: 8211 [2023-04-01 09:40:13,188 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 09:40:13,190 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 3346 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 5659 mSolverCounterSat, 1202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3346 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 6861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1202 IncrementalHoareTripleChecker+Valid, 5659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 09:40:13,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3346 Valid, 193 Invalid, 6861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1202 Valid, 5659 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 09:40:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8211 states. [2023-04-01 09:40:13,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8211 to 7981. [2023-04-01 09:40:13,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7981 states, 7769 states have (on average 1.4206461578066676) internal successors, (11037), 7803 states have internal predecessors, (11037), 42 states have call successors, (42), 42 states have call predecessors, (42), 169 states have return successors, (641), 135 states have call predecessors, (641), 41 states have call successors, (641) [2023-04-01 09:40:13,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7981 states to 7981 states and 11720 transitions. [2023-04-01 09:40:13,364 INFO L78 Accepts]: Start accepts. Automaton has 7981 states and 11720 transitions. Word has length 963 [2023-04-01 09:40:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:40:13,364 INFO L495 AbstractCegarLoop]: Abstraction has 7981 states and 11720 transitions. [2023-04-01 09:40:13,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 190.6) internal successors, (953), 4 states have internal predecessors, (953), 3 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:40:13,365 INFO L276 IsEmpty]: Start isEmpty. Operand 7981 states and 11720 transitions. [2023-04-01 09:40:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 989 [2023-04-01 09:40:13,391 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:40:13,391 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:40:13,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:40:13,392 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output5Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:40:13,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:40:13,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2025009136, now seen corresponding path program 1 times [2023-04-01 09:40:13,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:40:13,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454269359] [2023-04-01 09:40:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:40:13,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:40:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:40:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 39 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:40:16,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:40:16,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454269359] [2023-04-01 09:40:16,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454269359] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:40:16,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076066818] [2023-04-01 09:40:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:40:16,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:40:16,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:40:16,105 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 09:40:16,108 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 09:40:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:40:16,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 2343 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:40:16,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:40:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:40:16,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:40:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:40:16,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076066818] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:40:16,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [92786069] [2023-04-01 09:40:16,978 INFO L159 IcfgInterpreter]: Started Sifa with 947 locations of interest [2023-04-01 09:40:16,978 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:40:16,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:40:16,986 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:40:16,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:40:17,834 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 196 for LOIs