/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_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:02:43,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:02:43,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:02:43,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:02:43,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:02:43,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:02:43,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:02:43,578 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:02:43,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:02:43,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:02:43,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:02:43,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:02:43,587 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:02:43,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:02:43,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:02:43,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:02:43,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:02:43,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:02:43,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:02:43,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:02:43,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:02:43,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:02:43,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:02:43,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:02:43,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:02:43,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:02:43,612 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:02:43,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:02:43,614 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:02:43,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:02:43,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:02:43,615 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:02:43,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:02:43,617 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:02:43,618 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:02:43,618 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:02:43,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:02:43,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:02:43,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:02:43,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:02:43,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:02:43,621 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 10:02:43,653 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:02:43,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:02:43,654 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:02:43,654 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:02:43,655 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:02:43,655 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:02:43,655 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:02:43,656 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:02:43,656 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:02:43,656 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:02:43,657 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:02:43,657 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:02:43,657 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:02:43,657 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:02:43,657 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:02:43,657 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:02:43,657 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:02:43,657 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:02:43,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:02:43,658 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:02:43,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:02:43,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:02:43,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:02:43,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:02:43,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:02:43,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:02:43,659 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:02:43,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:02:43,660 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:02:43,660 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:02:43,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:02:43,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:02:43,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:02:43,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:02:43,660 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:02:43,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:02:43,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:02:43,661 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:02:43,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:02:43,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:02:43,661 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:02:43,661 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:02:43,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:02:43,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:02:43,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:02:43,908 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:02:43,909 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:02:43,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label06.c [2023-04-01 10:02:45,063 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:02:45,477 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:02:45,478 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label06.c [2023-04-01 10:02:45,505 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33ad1acf1/401f3bbd56d14509a23a9d608e08fce8/FLAGcf10e48fc [2023-04-01 10:02:45,518 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33ad1acf1/401f3bbd56d14509a23a9d608e08fce8 [2023-04-01 10:02:45,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:02:45,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:02:45,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:02:45,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:02:45,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:02:45,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:02:45" (1/1) ... [2023-04-01 10:02:45,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52891858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:45, skipping insertion in model container [2023-04-01 10:02:45,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:02:45" (1/1) ... [2023-04-01 10:02:45,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:02:45,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:02:45,874 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_label06.c[3178,3191] [2023-04-01 10:02:46,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:02:46,635 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:02:46,658 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_label06.c[3178,3191] [2023-04-01 10:02:47,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:02:47,023 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:02:47,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:47 WrapperNode [2023-04-01 10:02:47,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:02:47,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:02:47,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:02:47,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:02:47,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:47" (1/1) ... [2023-04-01 10:02:47,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:47" (1/1) ... [2023-04-01 10:02:47,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:47" (1/1) ... [2023-04-01 10:02:47,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:47" (1/1) ... [2023-04-01 10:02:47,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:47" (1/1) ... [2023-04-01 10:02:47,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:47" (1/1) ... [2023-04-01 10:02:47,292 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:47" (1/1) ... [2023-04-01 10:02:47,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:47" (1/1) ... [2023-04-01 10:02:47,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:02:47,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:02:47,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:02:47,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:02:47,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:47" (1/1) ... [2023-04-01 10:02:47,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:02:47,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:02:47,377 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 10:02:47,406 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 10:02:47,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:02:47,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:02:47,423 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:02:47,423 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:02:47,423 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:02:47,423 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:02:47,424 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:02:47,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:02:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:02:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:02:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:02:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:02:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:02:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:02:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:02:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:02:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:02:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:02:47,424 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:02:47,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:02:47,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:02:47,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:02:47,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:02:47,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:02:47,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:02:47,521 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:02:47,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:02:51,175 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:02:51,699 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:02:51,699 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:02:51,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:02:51 BoogieIcfgContainer [2023-04-01 10:02:51,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:02:51,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:02:51,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:02:51,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:02:51,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:02:45" (1/3) ... [2023-04-01 10:02:51,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb3ddc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:02:51, skipping insertion in model container [2023-04-01 10:02:51,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:02:47" (2/3) ... [2023-04-01 10:02:51,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb3ddc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:02:51, skipping insertion in model container [2023-04-01 10:02:51,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:02:51" (3/3) ... [2023-04-01 10:02:51,710 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label06.c [2023-04-01 10:02:51,726 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:02:51,726 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:02:51,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:02:51,786 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;@1bf33d4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:02:51,786 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:02:51,793 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 10:02:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:02:51,799 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:51,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:02:51,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:51,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:51,805 INFO L85 PathProgramCache]: Analyzing trace with hash 832851426, now seen corresponding path program 1 times [2023-04-01 10:02:51,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:51,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056772427] [2023-04-01 10:02:51,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:51,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:52,176 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 10:02:52,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056772427] [2023-04-01 10:02:52,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056772427] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:02:52,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:02:52,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:02:52,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740802768] [2023-04-01 10:02:52,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:02:52,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:02:52,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:02:52,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:02:52,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:02:52,208 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 10:02:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:02:55,346 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 10:02:55,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:02:55,348 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 10:02:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:02:55,369 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 10:02:55,370 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 10:02:55,376 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 10:02:55,378 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 10:02:55,379 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 10:02:55,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 10:02:55,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2023-04-01 10:02:55,482 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 10:02:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2477 transitions. [2023-04-01 10:02:55,491 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2477 transitions. Word has length 11 [2023-04-01 10:02:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:02:55,491 INFO L495 AbstractCegarLoop]: Abstraction has 1365 states and 2477 transitions. [2023-04-01 10:02:55,492 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 10:02:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2477 transitions. [2023-04-01 10:02:55,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 10:02:55,493 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:55,493 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 10:02:55,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:02:55,494 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:55,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:55,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1468985687, now seen corresponding path program 1 times [2023-04-01 10:02:55,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:55,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852857348] [2023-04-01 10:02:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:55,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:55,611 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 10:02:55,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:55,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852857348] [2023-04-01 10:02:55,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852857348] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:02:55,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:02:55,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:02:55,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865028036] [2023-04-01 10:02:55,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:02:55,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:02:55,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:02:55,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:02:55,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:02:55,616 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 10:02:58,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:02:58,782 INFO L93 Difference]: Finished difference Result 4081 states and 7455 transitions. [2023-04-01 10:02:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:02:58,785 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 10:02:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:02:58,796 INFO L225 Difference]: With dead ends: 4081 [2023-04-01 10:02:58,796 INFO L226 Difference]: Without dead ends: 2721 [2023-04-01 10:02:58,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:02:58,801 INFO L413 NwaCegarLoop]: 1214 mSDtfsCounter, 686 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 2294 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s 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, 3.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:02:58,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 1242 Invalid, 2871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 2294 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-04-01 10:02:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2023-04-01 10:02:58,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2718. [2023-04-01 10:02:58,878 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 10:02:58,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 4631 transitions. [2023-04-01 10:02:58,890 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 4631 transitions. Word has length 27 [2023-04-01 10:02:58,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:02:58,890 INFO L495 AbstractCegarLoop]: Abstraction has 2718 states and 4631 transitions. [2023-04-01 10:02:58,890 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 10:02:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 4631 transitions. [2023-04-01 10:02:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 10:02:58,893 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:02:58,893 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 10:02:58,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:02:58,893 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:02:58,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:02:58,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1401426273, now seen corresponding path program 1 times [2023-04-01 10:02:58,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:02:58,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083972031] [2023-04-01 10:02:58,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:02:58,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:02:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:02:59,133 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 10:02:59,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:02:59,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083972031] [2023-04-01 10:02:59,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083972031] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:02:59,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:02:59,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:02:59,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508765017] [2023-04-01 10:02:59,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:02:59,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:02:59,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:02:59,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:02:59,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:02:59,136 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 10:03:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:03:03,044 INFO L93 Difference]: Finished difference Result 8254 states and 14243 transitions. [2023-04-01 10:03:03,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:03:03,049 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 10:03:03,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:03:03,076 INFO L225 Difference]: With dead ends: 8254 [2023-04-01 10:03:03,076 INFO L226 Difference]: Without dead ends: 5541 [2023-04-01 10:03:03,083 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 10:03:03,084 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2798 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3685 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:03:03,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2798 Valid, 86 Invalid, 4355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 3685 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 10:03:03,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2023-04-01 10:03:03,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 5489. [2023-04-01 10:03:03,225 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 10:03:03,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 8544 transitions. [2023-04-01 10:03:03,246 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 8544 transitions. Word has length 31 [2023-04-01 10:03:03,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:03:03,246 INFO L495 AbstractCegarLoop]: Abstraction has 5489 states and 8544 transitions. [2023-04-01 10:03:03,247 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 10:03:03,247 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 8544 transitions. [2023-04-01 10:03:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 10:03:03,256 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:03:03,256 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 10:03:03,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:03:03,256 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:03:03,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:03:03,258 INFO L85 PathProgramCache]: Analyzing trace with hash -205285004, now seen corresponding path program 1 times [2023-04-01 10:03:03,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:03:03,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270005453] [2023-04-01 10:03:03,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:03,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:03:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:03,478 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 10:03:03,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:03:03,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270005453] [2023-04-01 10:03:03,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270005453] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:03:03,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:03:03,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:03:03,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557096722] [2023-04-01 10:03:03,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:03:03,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:03:03,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:03:03,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:03:03,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:03:03,481 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 10:03:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:03:07,220 INFO L93 Difference]: Finished difference Result 16764 states and 27180 transitions. [2023-04-01 10:03:07,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 10:03:07,222 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 10:03:07,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:03:07,275 INFO L225 Difference]: With dead ends: 16764 [2023-04-01 10:03:07,275 INFO L226 Difference]: Without dead ends: 11280 [2023-04-01 10:03:07,290 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 10:03:07,291 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2161 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 4071 mSolverCounterSat, 710 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2161 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 4781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 710 IncrementalHoareTripleChecker+Valid, 4071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:03:07,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2161 Valid, 85 Invalid, 4781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [710 Valid, 4071 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 10:03:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11280 states. [2023-04-01 10:03:07,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11280 to 10967. [2023-04-01 10:03:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10967 states, 10721 states have (on average 1.3593881167801511) internal successors, (14574), 10776 states have internal predecessors, (14574), 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 10:03:07,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10967 states to 10967 states and 15880 transitions. [2023-04-01 10:03:07,611 INFO L78 Accepts]: Start accepts. Automaton has 10967 states and 15880 transitions. Word has length 42 [2023-04-01 10:03:07,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:03:07,612 INFO L495 AbstractCegarLoop]: Abstraction has 10967 states and 15880 transitions. [2023-04-01 10:03:07,612 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 10:03:07,612 INFO L276 IsEmpty]: Start isEmpty. Operand 10967 states and 15880 transitions. [2023-04-01 10:03:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 10:03:07,616 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:03:07,616 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 10:03:07,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:03:07,617 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:03:07,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:03:07,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2137291901, now seen corresponding path program 1 times [2023-04-01 10:03:07,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:03:07,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734931821] [2023-04-01 10:03:07,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:07,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:03:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:07,797 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 10:03:07,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:03:07,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734931821] [2023-04-01 10:03:07,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734931821] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:03:07,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:03:07,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:03:07,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387668128] [2023-04-01 10:03:07,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:03:07,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:03:07,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:03:07,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:03:07,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:03:07,799 INFO L87 Difference]: Start difference. First operand 10967 states and 15880 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 10:03:11,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:03:11,558 INFO L93 Difference]: Finished difference Result 31960 states and 49363 transitions. [2023-04-01 10:03:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:03:11,561 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 10:03:11,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:03:11,673 INFO L225 Difference]: With dead ends: 31960 [2023-04-01 10:03:11,673 INFO L226 Difference]: Without dead ends: 20998 [2023-04-01 10:03:11,706 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 10:03:11,708 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2392 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s 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, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:03:11,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2392 Valid, 101 Invalid, 5044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1284 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 10:03:11,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20998 states. [2023-04-01 10:03:12,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20998 to 20784. [2023-04-01 10:03:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20784 states, 20289 states have (on average 1.3296860367686925) internal successors, (26978), 20420 states have internal predecessors, (26978), 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 10:03:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20784 states to 20784 states and 30377 transitions. [2023-04-01 10:03:12,273 INFO L78 Accepts]: Start accepts. Automaton has 20784 states and 30377 transitions. Word has length 65 [2023-04-01 10:03:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:03:12,274 INFO L495 AbstractCegarLoop]: Abstraction has 20784 states and 30377 transitions. [2023-04-01 10:03:12,275 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 10:03:12,275 INFO L276 IsEmpty]: Start isEmpty. Operand 20784 states and 30377 transitions. [2023-04-01 10:03:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-04-01 10:03:12,277 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:03:12,277 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 10:03:12,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 10:03:12,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:03:12,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:03:12,278 INFO L85 PathProgramCache]: Analyzing trace with hash 500998388, now seen corresponding path program 1 times [2023-04-01 10:03:12,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:03:12,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670724329] [2023-04-01 10:03:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:12,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:03:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:12,480 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 10:03:12,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:03:12,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670724329] [2023-04-01 10:03:12,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670724329] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:03:12,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38017415] [2023-04-01 10:03:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:03:12,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:03:12,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:03:12,485 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 10:03:12,510 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 10:03:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:03:12,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:03:12,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:03:12,797 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 10:03:12,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:03:13,010 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 10:03:13,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38017415] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:03:13,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79983981] [2023-04-01 10:03:13,077 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-04-01 10:03:13,077 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:03:13,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:03:13,084 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:03:13,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:03:13,374 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 84 for LOIs [2023-04-01 10:03:13,549 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2023-04-01 10:03:18,102 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 44