/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/Problem04_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 16:58:37,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 16:58:37,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 16:58:37,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 16:58:37,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 16:58:37,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 16:58:37,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 16:58:37,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 16:58:37,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 16:58:37,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 16:58:37,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 16:58:37,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 16:58:37,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 16:58:37,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 16:58:37,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 16:58:37,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 16:58:37,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 16:58:37,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 16:58:37,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 16:58:37,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 16:58:37,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 16:58:37,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 16:58:37,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 16:58:37,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 16:58:37,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 16:58:37,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 16:58:37,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 16:58:37,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 16:58:37,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 16:58:37,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 16:58:37,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 16:58:37,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 16:58:37,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 16:58:37,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 16:58:37,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 16:58:37,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 16:58:37,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 16:58:37,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 16:58:37,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 16:58:37,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 16:58:37,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 16:58:37,381 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 [2023-04-02 16:58:37,408 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 16:58:37,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 16:58:37,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 16:58:37,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 16:58:37,409 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 16:58:37,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 16:58:37,409 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 16:58:37,409 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 16:58:37,410 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 16:58:37,410 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 16:58:37,410 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 16:58:37,410 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 16:58:37,410 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 16:58:37,410 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 16:58:37,410 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 16:58:37,410 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 16:58:37,411 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 16:58:37,411 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 16:58:37,411 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 16:58:37,411 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 16:58:37,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 16:58:37,412 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 16:58:37,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 16:58:37,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 16:58:37,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 16:58:37,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 16:58:37,412 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 16:58:37,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 16:58:37,413 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 16:58:37,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 16:58:37,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 16:58:37,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 16:58:37,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:58:37,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 16:58:37,414 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 16:58:37,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 16:58:37,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 16:58:37,414 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 16:58:37,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 16:58:37,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 16:58:37,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 16:58:37,415 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 16:58:37,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 16:58:37,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 16:58:37,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 16:58:37,681 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 16:58:37,681 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 16:58:37,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem04_label30.c [2023-04-02 16:58:38,828 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 16:58:39,301 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 16:58:39,301 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem04_label30.c [2023-04-02 16:58:39,338 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335f8b4df/43d351100a4248a0a9b3e356c95ce919/FLAGf7a0fa380 [2023-04-02 16:58:39,355 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/335f8b4df/43d351100a4248a0a9b3e356c95ce919 [2023-04-02 16:58:39,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 16:58:39,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 16:58:39,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 16:58:39,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 16:58:39,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 16:58:39,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:58:39" (1/1) ... [2023-04-02 16:58:39,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf22507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:39, skipping insertion in model container [2023-04-02 16:58:39,369 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 04:58:39" (1/1) ... [2023-04-02 16:58:39,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 16:58:39,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 16:58:40,522 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/Problem04_label30.c[179782,179795] [2023-04-02 16:58:40,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:58:40,551 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 16:58:40,972 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/Problem04_label30.c[179782,179795] [2023-04-02 16:58:40,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 16:58:41,003 INFO L208 MainTranslator]: Completed translation [2023-04-02 16:58:41,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:41 WrapperNode [2023-04-02 16:58:41,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 16:58:41,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 16:58:41,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 16:58:41,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 16:58:41,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:41" (1/1) ... [2023-04-02 16:58:41,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:41" (1/1) ... [2023-04-02 16:58:41,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:41" (1/1) ... [2023-04-02 16:58:41,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:41" (1/1) ... [2023-04-02 16:58:41,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:41" (1/1) ... [2023-04-02 16:58:41,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:41" (1/1) ... [2023-04-02 16:58:41,191 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:41" (1/1) ... [2023-04-02 16:58:41,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:41" (1/1) ... [2023-04-02 16:58:41,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 16:58:41,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 16:58:41,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 16:58:41,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 16:58:41,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:41" (1/1) ... [2023-04-02 16:58:41,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 16:58:41,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:58:41,266 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) [2023-04-02 16:58:41,289 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 [2023-04-02 16:58:41,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 16:58:41,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 16:58:41,305 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 16:58:41,305 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 16:58:41,305 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 16:58:41,305 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 16:58:41,306 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-02 16:58:41,306 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 16:58:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 16:58:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 16:58:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 16:58:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-02 16:58:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 16:58:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 16:58:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 16:58:41,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 16:58:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 16:58:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 16:58:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 16:58:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 16:58:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 16:58:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 16:58:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 16:58:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 16:58:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 16:58:41,405 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 16:58:41,407 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 16:58:44,914 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 16:58:45,206 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 16:58:45,206 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 16:58:45,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:58:45 BoogieIcfgContainer [2023-04-02 16:58:45,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 16:58:45,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 16:58:45,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 16:58:45,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 16:58:45,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 04:58:39" (1/3) ... [2023-04-02 16:58:45,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16825443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:58:45, skipping insertion in model container [2023-04-02 16:58:45,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 04:58:41" (2/3) ... [2023-04-02 16:58:45,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16825443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 04:58:45, skipping insertion in model container [2023-04-02 16:58:45,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 04:58:45" (3/3) ... [2023-04-02 16:58:45,217 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem04_label30.c [2023-04-02 16:58:45,233 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 16:58:45,233 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 16:58:45,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 16:58:45,294 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;@12d8e246, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 16:58:45,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 16:58:45,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 785 states, 771 states have (on average 1.9779507133592737) internal successors, (1525), 772 states have internal predecessors, (1525), 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) [2023-04-02 16:58:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 768 [2023-04-02 16:58:45,335 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:58:45,336 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] [2023-04-02 16:58:45,337 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:58:45,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:58:45,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1101343561, now seen corresponding path program 1 times [2023-04-02 16:58:45,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:58:45,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518006802] [2023-04-02 16:58:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:58:45,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:58:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:58:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:58:49,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:58:49,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518006802] [2023-04-02 16:58:49,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518006802] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:58:49,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:58:49,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 16:58:49,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618482446] [2023-04-02 16:58:49,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:58:49,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 16:58:49,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:58:49,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 16:58:49,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:58:49,271 INFO L87 Difference]: Start difference. First operand has 785 states, 771 states have (on average 1.9779507133592737) internal successors, (1525), 772 states have internal predecessors, (1525), 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 253.33333333333334) internal successors, (760), 2 states have internal predecessors, (760), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 16:58:52,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:58:52,270 INFO L93 Difference]: Finished difference Result 2343 states and 4615 transitions. [2023-04-02 16:58:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 16:58:52,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 2 states have internal predecessors, (760), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 767 [2023-04-02 16:58:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:58:52,308 INFO L225 Difference]: With dead ends: 2343 [2023-04-02 16:58:52,308 INFO L226 Difference]: Without dead ends: 1555 [2023-04-02 16:58:52,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 16:58:52,317 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 137 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2667 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 3049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 2667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 16:58:52,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 240 Invalid, 3049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 2667 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 16:58:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2023-04-02 16:58:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1555. [2023-04-02 16:58:52,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1535 states have (on average 1.8684039087947883) internal successors, (2868), 1535 states have internal predecessors, (2868), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2023-04-02 16:58:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2895 transitions. [2023-04-02 16:58:52,455 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2895 transitions. Word has length 767 [2023-04-02 16:58:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:58:52,458 INFO L495 AbstractCegarLoop]: Abstraction has 1555 states and 2895 transitions. [2023-04-02 16:58:52,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 253.33333333333334) internal successors, (760), 2 states have internal predecessors, (760), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 16:58:52,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2895 transitions. [2023-04-02 16:58:52,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2023-04-02 16:58:52,479 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:58:52,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 16:58:52,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 16:58:52,480 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:58:52,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:58:52,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1068301287, now seen corresponding path program 1 times [2023-04-02 16:58:52,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:58:52,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099467047] [2023-04-02 16:58:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:58:52,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:58:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:58:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:58:55,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:58:55,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099467047] [2023-04-02 16:58:55,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099467047] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:58:55,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:58:55,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:58:55,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400235017] [2023-04-02 16:58:55,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:58:55,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:58:55,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:58:55,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:58:55,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:58:55,091 INFO L87 Difference]: Start difference. First operand 1555 states and 2895 transitions. Second operand has 5 states, 5 states have (on average 153.2) internal successors, (766), 4 states have internal predecessors, (766), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:58:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:58:59,427 INFO L93 Difference]: Finished difference Result 4762 states and 8869 transitions. [2023-04-02 16:58:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:58:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 153.2) internal successors, (766), 4 states have internal predecessors, (766), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 775 [2023-04-02 16:58:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:58:59,443 INFO L225 Difference]: With dead ends: 4762 [2023-04-02 16:58:59,444 INFO L226 Difference]: Without dead ends: 3212 [2023-04-02 16:58:59,448 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 [2023-04-02 16:58:59,449 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 2550 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 4204 mSolverCounterSat, 1729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2550 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 5933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1729 IncrementalHoareTripleChecker+Valid, 4204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-04-02 16:58:59,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2550 Valid, 146 Invalid, 5933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1729 Valid, 4204 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-04-02 16:58:59,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2023-04-02 16:58:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 3185. [2023-04-02 16:58:59,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 3119 states have (on average 1.5950625200384738) internal successors, (4975), 3127 states have internal predecessors, (4975), 18 states have call successors, (18), 18 states have call predecessors, (18), 47 states have return successors, (115), 39 states have call predecessors, (115), 17 states have call successors, (115) [2023-04-02 16:58:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 5108 transitions. [2023-04-02 16:58:59,557 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 5108 transitions. Word has length 775 [2023-04-02 16:58:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:58:59,558 INFO L495 AbstractCegarLoop]: Abstraction has 3185 states and 5108 transitions. [2023-04-02 16:58:59,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.2) internal successors, (766), 4 states have internal predecessors, (766), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:58:59,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 5108 transitions. [2023-04-02 16:58:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 778 [2023-04-02 16:58:59,585 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:58:59,585 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 16:58:59,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 16:58:59,586 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:58:59,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:58:59,586 INFO L85 PathProgramCache]: Analyzing trace with hash 212483029, now seen corresponding path program 1 times [2023-04-02 16:58:59,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:58:59,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239797817] [2023-04-02 16:58:59,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:58:59,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:58:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:59:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:59:00,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:59:00,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239797817] [2023-04-02 16:59:00,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239797817] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:59:00,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:59:00,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:59:00,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017083163] [2023-04-02 16:59:00,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:59:00,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:59:00,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:59:00,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:59:00,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:59:00,658 INFO L87 Difference]: Start difference. First operand 3185 states and 5108 transitions. Second operand has 5 states, 5 states have (on average 153.6) internal successors, (768), 4 states have internal predecessors, (768), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:59:04,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:59:04,479 INFO L93 Difference]: Finished difference Result 9670 states and 15703 transitions. [2023-04-02 16:59:04,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 16:59:04,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 153.6) internal successors, (768), 4 states have internal predecessors, (768), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 777 [2023-04-02 16:59:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:59:04,518 INFO L225 Difference]: With dead ends: 9670 [2023-04-02 16:59:04,518 INFO L226 Difference]: Without dead ends: 6490 [2023-04-02 16:59:04,525 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 [2023-04-02 16:59:04,526 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3287 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 1561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3287 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 5394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1561 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-02 16:59:04,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3287 Valid, 94 Invalid, 5394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1561 Valid, 3833 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-02 16:59:04,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6490 states. [2023-04-02 16:59:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6490 to 6449. [2023-04-02 16:59:04,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6449 states, 6289 states have (on average 1.4251868341548737) internal successors, (8963), 6315 states have internal predecessors, (8963), 34 states have call successors, (34), 34 states have call predecessors, (34), 125 states have return successors, (369), 99 states have call predecessors, (369), 33 states have call successors, (369) [2023-04-02 16:59:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6449 states to 6449 states and 9366 transitions. [2023-04-02 16:59:04,724 INFO L78 Accepts]: Start accepts. Automaton has 6449 states and 9366 transitions. Word has length 777 [2023-04-02 16:59:04,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:59:04,725 INFO L495 AbstractCegarLoop]: Abstraction has 6449 states and 9366 transitions. [2023-04-02 16:59:04,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.6) internal successors, (768), 4 states have internal predecessors, (768), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:59:04,725 INFO L276 IsEmpty]: Start isEmpty. Operand 6449 states and 9366 transitions. [2023-04-02 16:59:04,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2023-04-02 16:59:04,741 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:59:04,742 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 16:59:04,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 16:59:04,742 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:59:04,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:59:04,743 INFO L85 PathProgramCache]: Analyzing trace with hash -685530359, now seen corresponding path program 1 times [2023-04-02 16:59:04,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:59:04,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150312259] [2023-04-02 16:59:04,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:59:04,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:59:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:59:06,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:59:06,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:59:06,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150312259] [2023-04-02 16:59:06,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150312259] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:59:06,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:59:06,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:59:06,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762284233] [2023-04-02 16:59:06,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:59:06,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:59:06,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:59:06,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:59:06,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:59:06,016 INFO L87 Difference]: Start difference. First operand 6449 states and 9366 transitions. Second operand has 5 states, 5 states have (on average 154.8) internal successors, (774), 4 states have internal predecessors, (774), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:59:09,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:59:09,502 INFO L93 Difference]: Finished difference Result 19565 states and 29533 transitions. [2023-04-02 16:59:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 16:59:09,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 154.8) internal successors, (774), 4 states have internal predecessors, (774), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 783 [2023-04-02 16:59:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:59:09,582 INFO L225 Difference]: With dead ends: 19565 [2023-04-02 16:59:09,582 INFO L226 Difference]: Without dead ends: 13121 [2023-04-02 16:59:09,598 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 [2023-04-02 16:59:09,605 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 3028 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4164 mSolverCounterSat, 1394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3028 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 5558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1394 IncrementalHoareTripleChecker+Valid, 4164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-02 16:59:09,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3028 Valid, 112 Invalid, 5558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1394 Valid, 4164 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-02 16:59:09,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13121 states. [2023-04-02 16:59:09,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13121 to 12973. [2023-04-02 16:59:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12973 states, 12623 states have (on average 1.3590271726214054) internal successors, (17155), 12695 states have internal predecessors, (17155), 66 states have call successors, (66), 66 states have call predecessors, (66), 283 states have return successors, (1250), 211 states have call predecessors, (1250), 65 states have call successors, (1250) [2023-04-02 16:59:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12973 states to 12973 states and 18471 transitions. [2023-04-02 16:59:09,996 INFO L78 Accepts]: Start accepts. Automaton has 12973 states and 18471 transitions. Word has length 783 [2023-04-02 16:59:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:59:09,997 INFO L495 AbstractCegarLoop]: Abstraction has 12973 states and 18471 transitions. [2023-04-02 16:59:09,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 154.8) internal successors, (774), 4 states have internal predecessors, (774), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:59:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 12973 states and 18471 transitions. [2023-04-02 16:59:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 785 [2023-04-02 16:59:10,028 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:59:10,028 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-02 16:59:10,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 16:59:10,030 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:59:10,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:59:10,031 INFO L85 PathProgramCache]: Analyzing trace with hash -717010989, now seen corresponding path program 1 times [2023-04-02 16:59:10,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:59:10,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852544739] [2023-04-02 16:59:10,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:59:10,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:59:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:59:11,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:59:11,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:59:11,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852544739] [2023-04-02 16:59:11,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852544739] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 16:59:11,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 16:59:11,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 16:59:11,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123391534] [2023-04-02 16:59:11,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 16:59:11,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 16:59:11,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 16:59:11,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 16:59:11,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 16:59:11,708 INFO L87 Difference]: Start difference. First operand 12973 states and 18471 transitions. Second operand has 5 states, 5 states have (on average 155.0) internal successors, (775), 4 states have internal predecessors, (775), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:59:15,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 16:59:15,374 INFO L93 Difference]: Finished difference Result 35109 states and 50895 transitions. [2023-04-02 16:59:15,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-02 16:59:15,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 155.0) internal successors, (775), 4 states have internal predecessors, (775), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 784 [2023-04-02 16:59:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 16:59:15,476 INFO L225 Difference]: With dead ends: 35109 [2023-04-02 16:59:15,476 INFO L226 Difference]: Without dead ends: 22141 [2023-04-02 16:59:15,503 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 [2023-04-02 16:59:15,504 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 2407 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4921 mSolverCounterSat, 1526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2407 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 6447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1526 IncrementalHoareTripleChecker+Valid, 4921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-02 16:59:15,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2407 Valid, 145 Invalid, 6447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1526 Valid, 4921 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-02 16:59:15,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22141 states. [2023-04-02 16:59:15,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22141 to 20462. [2023-04-02 16:59:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20462 states, 19842 states have (on average 1.2936699929442597) internal successors, (25669), 19985 states have internal predecessors, (25669), 102 states have call successors, (102), 102 states have call predecessors, (102), 517 states have return successors, (2789), 374 states have call predecessors, (2789), 101 states have call successors, (2789) [2023-04-02 16:59:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20462 states to 20462 states and 28560 transitions. [2023-04-02 16:59:15,985 INFO L78 Accepts]: Start accepts. Automaton has 20462 states and 28560 transitions. Word has length 784 [2023-04-02 16:59:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 16:59:15,986 INFO L495 AbstractCegarLoop]: Abstraction has 20462 states and 28560 transitions. [2023-04-02 16:59:15,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 155.0) internal successors, (775), 4 states have internal predecessors, (775), 3 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 16:59:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 20462 states and 28560 transitions. [2023-04-02 16:59:16,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 862 [2023-04-02 16:59:16,040 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 16:59:16,040 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-02 16:59:16,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 16:59:16,041 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output4Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 16:59:16,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 16:59:16,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1484616223, now seen corresponding path program 1 times [2023-04-02 16:59:16,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 16:59:16,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647741280] [2023-04-02 16:59:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:59:16,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 16:59:16,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:59:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-02 16:59:17,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 16:59:17,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647741280] [2023-04-02 16:59:17,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647741280] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 16:59:17,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131795340] [2023-04-02 16:59:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 16:59:17,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 16:59:17,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 16:59:17,385 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) [2023-04-02 16:59:17,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 16:59:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 16:59:17,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 1294 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 16:59:17,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 16:59:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:59:18,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 16:59:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 16:59:18,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131795340] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 16:59:18,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [413263493] [2023-04-02 16:59:18,304 INFO L159 IcfgInterpreter]: Started Sifa with 771 locations of interest [2023-04-02 16:59:18,304 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 16:59:18,308 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 16:59:18,313 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 16:59:18,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 16:59:18,597 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs [2023-04-02 16:59:30,849 WARN L223 SmtUtils]: Spent 10.53s on a formula simplification that was a NOOP. DAG size: 1032 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-04-02 17:00:22,949 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 18468 conjuctions. This might take some time... [2023-04-02 17:00:42,113 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 18468 conjuctions.