/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_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:03:52,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:03:52,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:03:52,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:03:52,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:03:52,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:03:53,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:03:53,002 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:03:53,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:03:53,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:03:53,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:03:53,014 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:03:53,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:03:53,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:03:53,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:03:53,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:03:53,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:03:53,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:03:53,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:03:53,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:03:53,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:03:53,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:03:53,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:03:53,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:03:53,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:03:53,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:03:53,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:03:53,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:03:53,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:03:53,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:03:53,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:03:53,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:03:53,041 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:03:53,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:03:53,042 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:03:53,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:03:53,043 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:03:53,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:03:53,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:03:53,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:03:53,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:03:53,045 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 04:03:53,078 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:03:53,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:03:53,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:03:53,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:03:53,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:03:53,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:03:53,080 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:03:53,080 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:03:53,080 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:03:53,080 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:03:53,084 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:03:53,085 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:03:53,085 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:03:53,085 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:03:53,085 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:03:53,085 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:03:53,085 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:03:53,085 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:03:53,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:03:53,086 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:03:53,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:03:53,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:03:53,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:03:53,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:03:53,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:03:53,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:03:53,087 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:03:53,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:03:53,088 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:03:53,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:03:53,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:03:53,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:03:53,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:03:53,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:03:53,089 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:03:53,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:03:53,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:03:53,089 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:03:53,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:03:53,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:03:53,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:03:53,089 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:03:53,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:03:53,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:03:53,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:03:53,347 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:03:53,347 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:03:53,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label02.c [2023-04-01 04:03:54,585 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:03:54,998 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:03:54,998 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label02.c [2023-04-01 04:03:55,036 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff46fff58/94ff53aa58c4426dace6cc8180644476/FLAG880099cb0 [2023-04-01 04:03:55,055 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff46fff58/94ff53aa58c4426dace6cc8180644476 [2023-04-01 04:03:55,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:03:55,060 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:03:55,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:03:55,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:03:55,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:03:55,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:03:55" (1/1) ... [2023-04-01 04:03:55,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4005379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:55, skipping insertion in model container [2023-04-01 04:03:55,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:03:55" (1/1) ... [2023-04-01 04:03:55,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:03:55,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:03:55,476 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_label02.c[5671,5684] [2023-04-01 04:03:56,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:03:56,334 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:03:56,419 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_label02.c[5671,5684] [2023-04-01 04:03:56,870 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:03:56,895 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:03:56,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:56 WrapperNode [2023-04-01 04:03:56,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:03:56,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:03:56,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:03:56,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:03:56,908 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:56" (1/1) ... [2023-04-01 04:03:56,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:56" (1/1) ... [2023-04-01 04:03:56,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:56" (1/1) ... [2023-04-01 04:03:56,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:56" (1/1) ... [2023-04-01 04:03:57,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:56" (1/1) ... [2023-04-01 04:03:57,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:56" (1/1) ... [2023-04-01 04:03:57,248 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:56" (1/1) ... [2023-04-01 04:03:57,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:56" (1/1) ... [2023-04-01 04:03:57,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:03:57,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:03:57,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:03:57,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:03:57,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:56" (1/1) ... [2023-04-01 04:03:57,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:03:57,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:57,354 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 04:03:57,364 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 04:03:57,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:03:57,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:03:57,395 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:03:57,395 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:03:57,395 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:03:57,395 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:03:57,395 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:03:57,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:03:57,395 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:03:57,395 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:03:57,395 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:03:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:03:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:03:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:03:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:03:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:03:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:03:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:03:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:03:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:03:57,396 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:03:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:03:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:03:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:03:57,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:03:57,507 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:03:57,510 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:04:02,301 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:04:04,988 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:04:04,988 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:04:04,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:04:04 BoogieIcfgContainer [2023-04-01 04:04:04,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:04:04,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:04:04,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:04:04,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:04:04,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:03:55" (1/3) ... [2023-04-01 04:04:04,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2625e70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:04:04, skipping insertion in model container [2023-04-01 04:04:04,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:56" (2/3) ... [2023-04-01 04:04:04,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2625e70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:04:04, skipping insertion in model container [2023-04-01 04:04:04,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:04:04" (3/3) ... [2023-04-01 04:04:04,999 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label02.c [2023-04-01 04:04:05,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:04:05,019 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:04:05,088 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:04:05,094 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;@56e2596d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:04:05,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:04:05,103 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 04:04:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:04:05,109 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:05,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:05,110 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:05,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:05,115 INFO L85 PathProgramCache]: Analyzing trace with hash -330931660, now seen corresponding path program 1 times [2023-04-01 04:04:05,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:05,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497363281] [2023-04-01 04:04:05,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:05,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:05,605 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 04:04:05,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:05,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497363281] [2023-04-01 04:04:05,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497363281] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:05,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:05,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:04:05,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34447829] [2023-04-01 04:04:05,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:05,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:05,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:05,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:05,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:05,651 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 04:04:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:09,286 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:04:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:09,289 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 04:04:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:09,317 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:04:09,318 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:04:09,327 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 04:04:09,330 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 831 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 2730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 650 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:09,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 305 Invalid, 2730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [650 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 04:04:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:04:09,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2023-04-01 04:04:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1351 states have (on average 1.7535159141376757) internal successors, (2369), 1351 states have internal predecessors, (2369), 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 04:04:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2392 transitions. [2023-04-01 04:04:09,456 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2392 transitions. Word has length 11 [2023-04-01 04:04:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:09,456 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2392 transitions. [2023-04-01 04:04:09,456 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 04:04:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2392 transitions. [2023-04-01 04:04:09,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 04:04:09,458 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:09,458 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:09,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:04:09,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:09,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:09,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1318330575, now seen corresponding path program 1 times [2023-04-01 04:04:09,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:09,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076814394] [2023-04-01 04:04:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:09,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:09,642 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 04:04:09,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:09,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076814394] [2023-04-01 04:04:09,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076814394] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:09,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:09,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:04:09,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191773819] [2023-04-01 04:04:09,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:09,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:09,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:09,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:09,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:04:09,645 INFO L87 Difference]: Start difference. First operand 1369 states and 2392 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:04:14,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:14,972 INFO L93 Difference]: Finished difference Result 4181 states and 7345 transitions. [2023-04-01 04:04:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:04:14,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-04-01 04:04:14,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:14,989 INFO L225 Difference]: With dead ends: 4181 [2023-04-01 04:04:14,990 INFO L226 Difference]: Without dead ends: 2817 [2023-04-01 04:04:15,000 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 04:04:15,003 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 2234 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 4324 mSolverCounterSat, 1091 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2234 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 5415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1091 IncrementalHoareTripleChecker+Valid, 4324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:15,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2234 Valid, 137 Invalid, 5415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1091 Valid, 4324 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-04-01 04:04:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2023-04-01 04:04:15,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2751. [2023-04-01 04:04:15,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2751 states, 2708 states have (on average 1.5535450516986706) internal successors, (4207), 2713 states have internal predecessors, (4207), 15 states have call successors, (15), 15 states have call predecessors, (15), 27 states have return successors, (75), 22 states have call predecessors, (75), 14 states have call successors, (75) [2023-04-01 04:04:15,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2751 states to 2751 states and 4297 transitions. [2023-04-01 04:04:15,140 INFO L78 Accepts]: Start accepts. Automaton has 2751 states and 4297 transitions. Word has length 27 [2023-04-01 04:04:15,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:15,141 INFO L495 AbstractCegarLoop]: Abstraction has 2751 states and 4297 transitions. [2023-04-01 04:04:15,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:04:15,141 INFO L276 IsEmpty]: Start isEmpty. Operand 2751 states and 4297 transitions. [2023-04-01 04:04:15,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:04:15,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:15,143 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] [2023-04-01 04:04:15,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:04:15,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:15,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:15,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1947016299, now seen corresponding path program 1 times [2023-04-01 04:04:15,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:15,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152846725] [2023-04-01 04:04:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:15,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:15,403 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 04:04:15,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152846725] [2023-04-01 04:04:15,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152846725] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:15,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:15,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:04:15,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676623323] [2023-04-01 04:04:15,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:15,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:15,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:15,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:15,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:04:15,407 INFO L87 Difference]: Start difference. First operand 2751 states and 4297 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 04:04:20,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:20,090 INFO L93 Difference]: Finished difference Result 8433 states and 13565 transitions. [2023-04-01 04:04:20,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:04:20,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 41 [2023-04-01 04:04:20,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:20,127 INFO L225 Difference]: With dead ends: 8433 [2023-04-01 04:04:20,127 INFO L226 Difference]: Without dead ends: 5687 [2023-04-01 04:04:20,139 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 04:04:20,143 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2123 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 5255 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2123 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 5255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:20,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2123 Valid, 118 Invalid, 6109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 5255 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-04-01 04:04:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5687 states. [2023-04-01 04:04:20,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5687 to 5570. [2023-04-01 04:04:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5570 states, 5445 states have (on average 1.5074380165289256) internal successors, (8208), 5471 states have internal predecessors, (8208), 27 states have call successors, (27), 27 states have call predecessors, (27), 97 states have return successors, (413), 71 states have call predecessors, (413), 26 states have call successors, (413) [2023-04-01 04:04:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5570 states to 5570 states and 8648 transitions. [2023-04-01 04:04:20,318 INFO L78 Accepts]: Start accepts. Automaton has 5570 states and 8648 transitions. Word has length 41 [2023-04-01 04:04:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:20,319 INFO L495 AbstractCegarLoop]: Abstraction has 5570 states and 8648 transitions. [2023-04-01 04:04:20,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 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 04:04:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5570 states and 8648 transitions. [2023-04-01 04:04:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 04:04:20,327 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:20,327 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:20,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:04:20,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:20,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:20,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1419407442, now seen corresponding path program 1 times [2023-04-01 04:04:20,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:20,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120346548] [2023-04-01 04:04:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:20,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:04:20,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:20,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120346548] [2023-04-01 04:04:20,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120346548] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:20,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159031746] [2023-04-01 04:04:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:20,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:20,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:20,568 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 04:04:20,602 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 04:04:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:20,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:04:20,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:04:20,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:04:20,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159031746] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:20,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:04:20,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:04:20,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298430807] [2023-04-01 04:04:20,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:20,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:20,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:20,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:20,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:04:20,967 INFO L87 Difference]: Start difference. First operand 5570 states and 8648 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 04:04:24,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:24,863 INFO L93 Difference]: Finished difference Result 16768 states and 27174 transitions. [2023-04-01 04:04:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:04:24,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 42 [2023-04-01 04:04:24,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:24,921 INFO L225 Difference]: With dead ends: 16768 [2023-04-01 04:04:24,921 INFO L226 Difference]: Without dead ends: 11203 [2023-04-01 04:04:24,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:04:24,945 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2428 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3486 mSolverCounterSat, 1263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2428 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 4749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1263 IncrementalHoareTripleChecker+Valid, 3486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:24,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2428 Valid, 73 Invalid, 4749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1263 Valid, 3486 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 04:04:24,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11203 states. [2023-04-01 04:04:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11203 to 9834. [2023-04-01 04:04:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9575 states have (on average 1.370130548302872) internal successors, (13119), 9640 states have internal predecessors, (13119), 47 states have call successors, (47), 47 states have call predecessors, (47), 211 states have return successors, (1286), 146 states have call predecessors, (1286), 46 states have call successors, (1286) [2023-04-01 04:04:25,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 14452 transitions. [2023-04-01 04:04:25,228 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 14452 transitions. Word has length 42 [2023-04-01 04:04:25,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:25,229 INFO L495 AbstractCegarLoop]: Abstraction has 9834 states and 14452 transitions. [2023-04-01 04:04:25,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 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 04:04:25,229 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 14452 transitions. [2023-04-01 04:04:25,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 04:04:25,230 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:25,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:25,242 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 04:04:25,441 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 04:04:25,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:25,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:25,442 INFO L85 PathProgramCache]: Analyzing trace with hash 19683946, now seen corresponding path program 1 times [2023-04-01 04:04:25,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:25,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623656013] [2023-04-01 04:04:25,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:25,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:25,777 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:04:25,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:25,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623656013] [2023-04-01 04:04:25,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623656013] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:25,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194792117] [2023-04-01 04:04:25,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:25,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:25,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:25,783 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 04:04:25,808 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 04:04:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:25,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:04:25,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:25,941 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:04:25,942 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:04:25,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194792117] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:25,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:04:25,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:04:25,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796165278] [2023-04-01 04:04:25,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:25,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:04:25,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:25,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:04:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:04:25,943 INFO L87 Difference]: Start difference. First operand 9834 states and 14452 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:04:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:30,227 INFO L93 Difference]: Finished difference Result 24791 states and 37431 transitions. [2023-04-01 04:04:30,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 04:04:30,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2023-04-01 04:04:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:30,297 INFO L225 Difference]: With dead ends: 24791 [2023-04-01 04:04:30,298 INFO L226 Difference]: Without dead ends: 14962 [2023-04-01 04:04:30,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-04-01 04:04:30,328 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2042 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4474 mSolverCounterSat, 972 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2042 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 5446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 972 IncrementalHoareTripleChecker+Valid, 4474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:30,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2042 Valid, 103 Invalid, 5446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [972 Valid, 4474 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 04:04:30,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14962 states. [2023-04-01 04:04:30,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14962 to 14613. [2023-04-01 04:04:30,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14613 states, 14164 states have (on average 1.2820530923467948) internal successors, (18159), 14289 states have internal predecessors, (18159), 69 states have call successors, (69), 69 states have call predecessors, (69), 379 states have return successors, (2717), 254 states have call predecessors, (2717), 68 states have call successors, (2717) [2023-04-01 04:04:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14613 states to 14613 states and 20945 transitions. [2023-04-01 04:04:30,753 INFO L78 Accepts]: Start accepts. Automaton has 14613 states and 20945 transitions. Word has length 45 [2023-04-01 04:04:30,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:30,755 INFO L495 AbstractCegarLoop]: Abstraction has 14613 states and 20945 transitions. [2023-04-01 04:04:30,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 4 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:04:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 14613 states and 20945 transitions. [2023-04-01 04:04:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 04:04:30,758 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:30,758 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:30,767 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 04:04:30,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:30,965 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:30,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:30,965 INFO L85 PathProgramCache]: Analyzing trace with hash -750574973, now seen corresponding path program 1 times [2023-04-01 04:04:30,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:30,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321277431] [2023-04-01 04:04:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:30,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-04-01 04:04:31,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:31,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321277431] [2023-04-01 04:04:31,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321277431] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:04:31,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:04:31,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:04:31,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313237853] [2023-04-01 04:04:31,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:31,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:04:31,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:31,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:04:31,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:31,214 INFO L87 Difference]: Start difference. First operand 14613 states and 20945 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:04:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:34,477 INFO L93 Difference]: Finished difference Result 30633 states and 45247 transitions. [2023-04-01 04:04:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:04:34,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2023-04-01 04:04:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:34,526 INFO L225 Difference]: With dead ends: 30633 [2023-04-01 04:04:34,526 INFO L226 Difference]: Without dead ends: 16025 [2023-04-01 04:04:34,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:04:34,557 INFO L413 NwaCegarLoop]: 1160 mSDtfsCounter, 691 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:34,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1187 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:04:34,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16025 states. [2023-04-01 04:04:34,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16025 to 15824. [2023-04-01 04:04:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15824 states, 15366 states have (on average 1.2359104516464923) internal successors, (18991), 15492 states have internal predecessors, (18991), 74 states have call successors, (74), 74 states have call predecessors, (74), 383 states have return successors, (2733), 257 states have call predecessors, (2733), 73 states have call successors, (2733) [2023-04-01 04:04:34,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15824 states to 15824 states and 21798 transitions. [2023-04-01 04:04:34,872 INFO L78 Accepts]: Start accepts. Automaton has 15824 states and 21798 transitions. Word has length 79 [2023-04-01 04:04:34,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:34,874 INFO L495 AbstractCegarLoop]: Abstraction has 15824 states and 21798 transitions. [2023-04-01 04:04:34,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:04:34,874 INFO L276 IsEmpty]: Start isEmpty. Operand 15824 states and 21798 transitions. [2023-04-01 04:04:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 04:04:34,875 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:34,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:04:34,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-01 04:04:34,876 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:34,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:34,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1882423970, now seen corresponding path program 1 times [2023-04-01 04:04:34,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:34,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725530192] [2023-04-01 04:04:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:34,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:04:35,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:35,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725530192] [2023-04-01 04:04:35,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725530192] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:35,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619387744] [2023-04-01 04:04:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:35,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:35,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:35,205 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 04:04:35,208 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 04:04:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:35,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 04:04:35,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:04:35,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:04:35,728 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 04:04:35,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619387744] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:35,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:04:35,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 11 [2023-04-01 04:04:35,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46021647] [2023-04-01 04:04:35,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:04:35,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 04:04:35,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:04:35,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 04:04:35,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:04:35,731 INFO L87 Difference]: Start difference. First operand 15824 states and 21798 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 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 04:04:42,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-04-01 04:04:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:04:43,452 INFO L93 Difference]: Finished difference Result 58167 states and 81485 transitions. [2023-04-01 04:04:43,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:04:43,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 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 81 [2023-04-01 04:04:43,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:04:43,634 INFO L225 Difference]: With dead ends: 58167 [2023-04-01 04:04:43,634 INFO L226 Difference]: Without dead ends: 42348 [2023-04-01 04:04:43,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-04-01 04:04:43,680 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2029 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4131 mSolverCounterSat, 1698 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2029 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 5829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1698 IncrementalHoareTripleChecker+Valid, 4131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:04:43,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2029 Valid, 107 Invalid, 5829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1698 Valid, 4131 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-04-01 04:04:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42348 states. [2023-04-01 04:04:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42348 to 38507. [2023-04-01 04:04:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38507 states, 37624 states have (on average 1.219726770146715) internal successors, (45891), 37862 states have internal predecessors, (45891), 182 states have call successors, (182), 182 states have call predecessors, (182), 700 states have return successors, (8898), 462 states have call predecessors, (8898), 181 states have call successors, (8898) [2023-04-01 04:04:44,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38507 states to 38507 states and 54971 transitions. [2023-04-01 04:04:44,604 INFO L78 Accepts]: Start accepts. Automaton has 38507 states and 54971 transitions. Word has length 81 [2023-04-01 04:04:44,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:04:44,604 INFO L495 AbstractCegarLoop]: Abstraction has 38507 states and 54971 transitions. [2023-04-01 04:04:44,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 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 04:04:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand 38507 states and 54971 transitions. [2023-04-01 04:04:44,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-04-01 04:04:44,606 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:04:44,606 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, 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 04:04:44,622 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 04:04:44,822 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 04:04:44,823 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:04:44,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:04:44,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1407836518, now seen corresponding path program 1 times [2023-04-01 04:04:44,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:04:44,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84661649] [2023-04-01 04:04:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:44,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:04:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:04:45,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:04:45,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84661649] [2023-04-01 04:04:45,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84661649] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:04:45,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132179428] [2023-04-01 04:04:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:04:45,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:04:45,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:04:45,018 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 04:04:45,020 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 04:04:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:04:45,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:04:45,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:04:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:04:45,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:04:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 04:04:45,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132179428] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:04:45,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1158113552] [2023-04-01 04:04:45,352 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2023-04-01 04:04:45,352 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:04:45,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:04:45,358 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:04:45,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:04:45,503 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 04:04:46,062 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33