/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:04:50,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:04:50,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:04:50,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:04:50,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:04:50,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:04:50,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:04:50,358 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:04:50,359 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:04:50,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:04:50,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:04:50,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:04:50,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:04:50,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:04:50,370 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:04:50,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:04:50,372 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:04:50,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:04:50,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:04:50,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:04:50,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:04:50,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:04:50,385 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:04:50,386 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:04:50,394 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:04:50,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:04:50,395 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:04:50,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:04:50,397 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:04:50,398 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:04:50,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:04:50,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:04:50,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:04:50,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:04:50,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:04:50,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:04:50,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:04:50,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:04:50,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:04:50,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:04:50,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:04:50,405 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 10:04:50,436 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:04:50,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:04:50,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:04:50,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:04:50,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:04:50,438 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:04:50,438 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:04:50,438 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:04:50,438 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:04:50,438 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:04:50,439 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:04:50,439 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:04:50,439 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:04:50,439 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:04:50,439 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:04:50,439 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:04:50,440 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:04:50,440 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:04:50,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:04:50,440 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:04:50,440 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:04:50,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:04:50,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:04:50,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:04:50,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:04:50,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:04:50,442 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:04:50,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:04:50,442 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:04:50,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:04:50,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:04:50,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:04:50,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:04:50,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:04:50,443 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:04:50,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:04:50,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:04:50,443 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:04:50,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:04:50,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:04:50,443 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:04:50,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:04:50,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:04:50,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:04:50,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:04:50,722 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:04:50,723 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:04:50,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label37.c [2023-04-01 10:04:51,838 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:04:52,304 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:04:52,305 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label37.c [2023-04-01 10:04:52,336 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87636b0ba/c11a512f0f74413fb7cec63b577400f3/FLAG7606ce2d2 [2023-04-01 10:04:52,351 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87636b0ba/c11a512f0f74413fb7cec63b577400f3 [2023-04-01 10:04:52,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:04:52,355 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:04:52,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:04:52,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:04:52,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:04:52,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:04:52" (1/1) ... [2023-04-01 10:04:52,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26ce53f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:52, skipping insertion in model container [2023-04-01 10:04:52,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:04:52" (1/1) ... [2023-04-01 10:04:52,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:04:52,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:04:52,680 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/Problem12_label37.c[2005,2018] [2023-04-01 10:04:53,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:04:53,451 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:04:53,474 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/Problem12_label37.c[2005,2018] [2023-04-01 10:04:53,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:04:53,852 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:04:53,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:53 WrapperNode [2023-04-01 10:04:53,853 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:04:53,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:04:53,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:04:53,854 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:04:53,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:53" (1/1) ... [2023-04-01 10:04:53,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:53" (1/1) ... [2023-04-01 10:04:53,917 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:53" (1/1) ... [2023-04-01 10:04:53,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:53" (1/1) ... [2023-04-01 10:04:54,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:53" (1/1) ... [2023-04-01 10:04:54,063 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:53" (1/1) ... [2023-04-01 10:04:54,092 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:53" (1/1) ... [2023-04-01 10:04:54,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:53" (1/1) ... [2023-04-01 10:04:54,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:04:54,136 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:04:54,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:04:54,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:04:54,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:53" (1/1) ... [2023-04-01 10:04:54,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:04:54,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:04:54,170 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 10:04:54,193 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 10:04:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:04:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:04:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:04:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:04:54,212 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:04:54,213 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:04:54,213 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:04:54,213 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:04:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:04:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:04:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:04:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:04:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:04:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:04:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:04:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:04:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:04:54,213 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:04:54,214 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:04:54,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:04:54,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:04:54,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:04:54,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:04:54,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:04:54,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:04:54,288 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:04:54,290 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:04:58,158 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:04:58,683 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:04:58,684 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:04:58,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:04:58 BoogieIcfgContainer [2023-04-01 10:04:58,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:04:58,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:04:58,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:04:58,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:04:58,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:04:52" (1/3) ... [2023-04-01 10:04:58,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1e400f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:04:58, skipping insertion in model container [2023-04-01 10:04:58,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:04:53" (2/3) ... [2023-04-01 10:04:58,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1e400f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:04:58, skipping insertion in model container [2023-04-01 10:04:58,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:04:58" (3/3) ... [2023-04-01 10:04:58,694 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label37.c [2023-04-01 10:04:58,710 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:04:58,711 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:04:58,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:04:58,773 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;@51d0e5c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:04:58,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:04:58,782 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 10:04:58,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:04:58,788 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:04:58,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:04:58,789 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:04:58,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:04:58,794 INFO L85 PathProgramCache]: Analyzing trace with hash 636335361, now seen corresponding path program 1 times [2023-04-01 10:04:58,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:04:58,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533358561] [2023-04-01 10:04:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:04:58,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:04:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:04:59,187 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 10:04:59,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:04:59,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533358561] [2023-04-01 10:04:59,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533358561] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:04:59,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:04:59,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:04:59,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021423002] [2023-04-01 10:04:59,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:04:59,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:04:59,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:04:59,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:04:59,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:04:59,231 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 10:05:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:02,376 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:05:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:05:02,380 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 10:05:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:02,402 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:05:02,402 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:05:02,409 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 10:05:02,412 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 803 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2101 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 2765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 2101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:02,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 270 Invalid, 2765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 2101 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 10:05:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:05:02,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-04-01 10:05:02,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1347 states have (on average 1.821826280623608) internal successors, (2454), 1347 states have internal predecessors, (2454), 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 10:05:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2477 transitions. [2023-04-01 10:05:02,520 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2477 transitions. Word has length 11 [2023-04-01 10:05:02,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:02,521 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2477 transitions. [2023-04-01 10:05:02,521 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 10:05:02,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2477 transitions. [2023-04-01 10:05:02,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 10:05:02,523 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:02,523 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 10:05:02,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:05:02,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:02,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:02,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1018408472, now seen corresponding path program 1 times [2023-04-01 10:05:02,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:02,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184425889] [2023-04-01 10:05:02,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:02,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:02,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:05:02,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:02,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184425889] [2023-04-01 10:05:02,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184425889] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:05:02,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169104984] [2023-04-01 10:05:02,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:02,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:05:02,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:05:02,773 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 10:05:02,815 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 10:05:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:02,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:05:02,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:05:03,008 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 10:05:03,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:05:03,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169104984] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:03,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:05:03,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 10:05:03,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392018033] [2023-04-01 10:05:03,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:03,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:05:03,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:03,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:05:03,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:05:03,012 INFO L87 Difference]: Start difference. First operand 1365 states and 2477 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:05:06,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:06,411 INFO L93 Difference]: Finished difference Result 4081 states and 7455 transitions. [2023-04-01 10:05:06,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:05:06,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-04-01 10:05:06,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:06,426 INFO L225 Difference]: With dead ends: 4081 [2023-04-01 10:05:06,426 INFO L226 Difference]: Without dead ends: 2721 [2023-04-01 10:05:06,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:05:06,432 INFO L413 NwaCegarLoop]: 1214 mSDtfsCounter, 686 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 2871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 2294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:06,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1242 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 10:05:06,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2023-04-01 10:05:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2718. [2023-04-01 10:05:06,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2718 states, 2688 states have (on average 1.6986607142857142) internal successors, (4566), 2688 states have internal predecessors, (4566), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (50), 14 states have call predecessors, (50), 14 states have call successors, (50) [2023-04-01 10:05:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 4631 transitions. [2023-04-01 10:05:06,576 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 4631 transitions. Word has length 27 [2023-04-01 10:05:06,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:06,576 INFO L495 AbstractCegarLoop]: Abstraction has 2718 states and 4631 transitions. [2023-04-01 10:05:06,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:05:06,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 4631 transitions. [2023-04-01 10:05:06,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 10:05:06,578 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:06,578 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] [2023-04-01 10:05:06,590 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 10:05:06,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:05:06,788 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:06,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:06,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1248485712, now seen corresponding path program 1 times [2023-04-01 10:05:06,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:06,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644027314] [2023-04-01 10:05:06,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:06,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:06,965 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 10:05:06,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:06,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644027314] [2023-04-01 10:05:06,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644027314] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:06,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:05:06,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:05:06,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131623219] [2023-04-01 10:05:06,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:06,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:05:06,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:06,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:05:06,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:05:06,972 INFO L87 Difference]: Start difference. First operand 2718 states and 4631 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 10:05:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:11,113 INFO L93 Difference]: Finished difference Result 8254 states and 14243 transitions. [2023-04-01 10:05:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:05:11,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-04-01 10:05:11,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:11,140 INFO L225 Difference]: With dead ends: 8254 [2023-04-01 10:05:11,140 INFO L226 Difference]: Without dead ends: 5541 [2023-04-01 10:05:11,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:05:11,148 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2798 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3685 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2798 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 4355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 3685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:11,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2798 Valid, 86 Invalid, 4355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 3685 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-04-01 10:05:11,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2023-04-01 10:05:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 5489. [2023-04-01 10:05:11,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5489 states, 5409 states have (on average 1.5289332593825107) internal successors, (8270), 5419 states have internal predecessors, (8270), 27 states have call successors, (27), 27 states have call predecessors, (27), 52 states have return successors, (247), 42 states have call predecessors, (247), 26 states have call successors, (247) [2023-04-01 10:05:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 8544 transitions. [2023-04-01 10:05:11,313 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 8544 transitions. Word has length 31 [2023-04-01 10:05:11,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:11,313 INFO L495 AbstractCegarLoop]: Abstraction has 5489 states and 8544 transitions. [2023-04-01 10:05:11,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 10:05:11,314 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 8544 transitions. [2023-04-01 10:05:11,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 10:05:11,322 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:11,322 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] [2023-04-01 10:05:11,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:05:11,323 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:11,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash 754514469, now seen corresponding path program 1 times [2023-04-01 10:05:11,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:11,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612507796] [2023-04-01 10:05:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:11,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:11,493 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 10:05:11,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:11,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612507796] [2023-04-01 10:05:11,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612507796] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:11,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:05:11,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:05:11,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951116179] [2023-04-01 10:05:11,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:11,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:05:11,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:11,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:05:11,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:05:11,500 INFO L87 Difference]: Start difference. First operand 5489 states and 8544 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 10:05:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:15,734 INFO L93 Difference]: Finished difference Result 16766 states and 27181 transitions. [2023-04-01 10:05:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:05:15,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 42 [2023-04-01 10:05:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:15,804 INFO L225 Difference]: With dead ends: 16766 [2023-04-01 10:05:15,804 INFO L226 Difference]: Without dead ends: 11282 [2023-04-01 10:05:15,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:05:15,825 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 2090 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 4708 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2090 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 5416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 4708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:15,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2090 Valid, 93 Invalid, 5416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 4708 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-04-01 10:05:15,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11282 states. [2023-04-01 10:05:16,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11282 to 10967. [2023-04-01 10:05:16,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10967 states, 10721 states have (on average 1.3595746665423) internal successors, (14576), 10776 states have internal predecessors, (14576), 51 states have call successors, (51), 51 states have call predecessors, (51), 194 states have return successors, (1255), 139 states have call predecessors, (1255), 50 states have call successors, (1255) [2023-04-01 10:05:16,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10967 states to 10967 states and 15882 transitions. [2023-04-01 10:05:16,237 INFO L78 Accepts]: Start accepts. Automaton has 10967 states and 15882 transitions. Word has length 42 [2023-04-01 10:05:16,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:16,238 INFO L495 AbstractCegarLoop]: Abstraction has 10967 states and 15882 transitions. [2023-04-01 10:05:16,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 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 10:05:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand 10967 states and 15882 transitions. [2023-04-01 10:05:16,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 10:05:16,242 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:16,242 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] [2023-04-01 10:05:16,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:05:16,242 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:16,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:16,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1664380756, now seen corresponding path program 1 times [2023-04-01 10:05:16,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:16,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620517418] [2023-04-01 10:05:16,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:16,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:16,527 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 10:05:16,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:16,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620517418] [2023-04-01 10:05:16,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620517418] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:05:16,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:05:16,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:05:16,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525636830] [2023-04-01 10:05:16,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:05:16,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:05:16,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:05:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:05:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:05:16,530 INFO L87 Difference]: Start difference. First operand 10967 states and 15882 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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 10:05:20,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:05:20,347 INFO L93 Difference]: Finished difference Result 31960 states and 49368 transitions. [2023-04-01 10:05:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:05:20,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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 65 [2023-04-01 10:05:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:05:20,450 INFO L225 Difference]: With dead ends: 31960 [2023-04-01 10:05:20,450 INFO L226 Difference]: Without dead ends: 20998 [2023-04-01 10:05:20,482 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 10:05:20,483 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2392 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2392 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 5044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1284 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 10:05:20,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2392 Valid, 101 Invalid, 5044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1284 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 10:05:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20998 states. [2023-04-01 10:05:21,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20998 to 20784. [2023-04-01 10:05:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20784 states, 20289 states have (on average 1.3298339001429347) internal successors, (26981), 20420 states have internal predecessors, (26981), 94 states have call successors, (94), 94 states have call predecessors, (94), 400 states have return successors, (3305), 269 states have call predecessors, (3305), 93 states have call successors, (3305) [2023-04-01 10:05:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20784 states to 20784 states and 30380 transitions. [2023-04-01 10:05:21,127 INFO L78 Accepts]: Start accepts. Automaton has 20784 states and 30380 transitions. Word has length 65 [2023-04-01 10:05:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:05:21,128 INFO L495 AbstractCegarLoop]: Abstraction has 20784 states and 30380 transitions. [2023-04-01 10:05:21,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 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 10:05:21,129 INFO L276 IsEmpty]: Start isEmpty. Operand 20784 states and 30380 transitions. [2023-04-01 10:05:21,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 10:05:21,131 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:05:21,131 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 10:05:21,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:05:21,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:05:21,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:05:21,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1957058139, now seen corresponding path program 1 times [2023-04-01 10:05:21,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:05:21,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049983180] [2023-04-01 10:05:21,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:21,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:05:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:05:21,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:05:21,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049983180] [2023-04-01 10:05:21,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049983180] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:05:21,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298526787] [2023-04-01 10:05:21,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:05:21,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:05:21,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:05:21,345 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 10:05:21,353 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 10:05:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:05:21,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:05:21,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:05:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:05:21,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:05:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 10:05:21,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298526787] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:05:21,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542990745] [2023-04-01 10:05:21,858 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-01 10:05:21,858 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:05:21,862 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:05:21,867 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:05:21,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:05:22,198 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 84 for LOIs [2023-04-01 10:05:22,504 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-01 10:05:27,160 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 54