/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/Problem19_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:34:58,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:34:58,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:34:58,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:34:58,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:34:58,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:34:58,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:34:58,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:34:58,621 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:34:58,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:34:58,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:34:58,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:34:58,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:34:58,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:34:58,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:34:58,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:34:58,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:34:58,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:34:58,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:34:58,636 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:34:58,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:34:58,639 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:34:58,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:34:58,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:34:58,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:34:58,648 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:34:58,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:34:58,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:34:58,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:34:58,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:34:58,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:34:58,650 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:34:58,650 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:34:58,651 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:34:58,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:34:58,651 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:34:58,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:34:58,652 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:34:58,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:34:58,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:34:58,653 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:34:58,657 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 10:34:58,684 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:34:58,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:34:58,685 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:34:58,685 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:34:58,686 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:34:58,686 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:34:58,686 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:34:58,686 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:34:58,686 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:34:58,686 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:34:58,687 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:34:58,687 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:34:58,687 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:34:58,687 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:34:58,687 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:34:58,687 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:34:58,687 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:34:58,687 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:34:58,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:34:58,688 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:34:58,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:34:58,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:34:58,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:34:58,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:34:58,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:34:58,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:34:58,689 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:34:58,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:34:58,689 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:34:58,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:34:58,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:34:58,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:34:58,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:34:58,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:34:58,690 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:34:58,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:34:58,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:34:58,690 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:34:58,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:34:58,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:34:58,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:34:58,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:34:58,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:34:58,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:34:58,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:34:58,876 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:34:58,876 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:34:58,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label26.c [2023-04-01 10:34:59,791 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:35:00,596 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:35:00,596 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label26.c [2023-04-01 10:35:00,634 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1f08da30/ef98862409f740b89ac5bcbb1ba3e472/FLAGae76bd778 [2023-04-01 10:35:00,648 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1f08da30/ef98862409f740b89ac5bcbb1ba3e472 [2023-04-01 10:35:00,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:35:00,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:35:00,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:35:00,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:35:00,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:35:00,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:35:00" (1/1) ... [2023-04-01 10:35:00,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b0b320f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:00, skipping insertion in model container [2023-04-01 10:35:00,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:35:00" (1/1) ... [2023-04-01 10:35:00,661 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:35:00,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:35:01,010 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/Problem19_label26.c[3735,3748] [2023-04-01 10:35:01,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:35:01,894 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:35:01,915 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/Problem19_label26.c[3735,3748] [2023-04-01 10:35:02,417 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:35:02,441 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:35:02,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:02 WrapperNode [2023-04-01 10:35:02,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:35:02,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:35:02,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:35:02,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:35:02,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:02" (1/1) ... [2023-04-01 10:35:02,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:02" (1/1) ... [2023-04-01 10:35:02,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:02" (1/1) ... [2023-04-01 10:35:02,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:02" (1/1) ... [2023-04-01 10:35:02,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:02" (1/1) ... [2023-04-01 10:35:02,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:02" (1/1) ... [2023-04-01 10:35:02,714 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:02" (1/1) ... [2023-04-01 10:35:02,728 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:02" (1/1) ... [2023-04-01 10:35:02,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:35:02,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:35:02,813 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:35:02,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:35:02,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:02" (1/1) ... [2023-04-01 10:35:02,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:35:02,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:35:02,893 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 10:35:02,911 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 10:35:02,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:35:02,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:35:02,922 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:35:02,923 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:35:02,923 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:35:02,923 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:35:02,923 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:35:02,923 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 10:35:02,923 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 10:35:02,923 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:35:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:35:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:35:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:35:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:35:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 10:35:02,923 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 10:35:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:35:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:35:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:35:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:35:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:35:02,924 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:35:02,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:35:02,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:35:02,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:35:02,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:35:02,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:35:02,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:35:02,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:35:03,000 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:35:03,002 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:35:08,768 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:35:21,773 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:35:21,773 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:35:21,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:35:21 BoogieIcfgContainer [2023-04-01 10:35:21,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:35:21,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:35:21,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:35:21,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:35:21,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:35:00" (1/3) ... [2023-04-01 10:35:21,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d18d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:35:21, skipping insertion in model container [2023-04-01 10:35:21,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:35:02" (2/3) ... [2023-04-01 10:35:21,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d18d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:35:21, skipping insertion in model container [2023-04-01 10:35:21,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:35:21" (3/3) ... [2023-04-01 10:35:21,800 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label26.c [2023-04-01 10:35:21,841 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:35:21,841 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:35:21,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:35:21,900 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;@7614268, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:35:21,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:35:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 10:35:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:35:21,912 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:21,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:35:21,913 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:21,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:21,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1432410564, now seen corresponding path program 1 times [2023-04-01 10:35:21,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:21,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417582803] [2023-04-01 10:35:21,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:21,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:22,222 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 10:35:22,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:22,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417582803] [2023-04-01 10:35:22,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417582803] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:22,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:22,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:35:22,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065808782] [2023-04-01 10:35:22,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:22,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:35:22,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:22,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:35:22,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:35:22,253 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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 10:35:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:27,517 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 10:35:27,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:35:27,528 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 10:35:27,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:27,555 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 10:35:27,555 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 10:35:27,564 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 10:35:27,568 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 1265 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 1219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1265 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 4581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1219 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:27,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1265 Valid, 737 Invalid, 4581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1219 Valid, 3362 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-04-01 10:35:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 10:35:27,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-04-01 10:35:27,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.6464556397681676) internal successors, (3693), 2243 states have internal predecessors, (3693), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 10:35:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3728 transitions. [2023-04-01 10:35:27,672 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3728 transitions. Word has length 11 [2023-04-01 10:35:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:27,672 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 3728 transitions. [2023-04-01 10:35:27,673 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 10:35:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3728 transitions. [2023-04-01 10:35:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:35:27,674 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:27,674 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:35:27,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:35:27,674 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:27,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1235992571, now seen corresponding path program 1 times [2023-04-01 10:35:27,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:27,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95216963] [2023-04-01 10:35:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:27,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:27,804 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 10:35:27,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:27,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95216963] [2023-04-01 10:35:27,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95216963] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:27,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:27,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:35:27,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406220207] [2023-04-01 10:35:27,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:27,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:27,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:35:27,807 INFO L87 Difference]: Start difference. First operand 2269 states and 3728 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 10:35:35,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:35,023 INFO L93 Difference]: Finished difference Result 6943 states and 11442 transitions. [2023-04-01 10:35:35,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:35:35,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-01 10:35:35,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:35,040 INFO L225 Difference]: With dead ends: 6943 [2023-04-01 10:35:35,040 INFO L226 Difference]: Without dead ends: 4679 [2023-04-01 10:35:35,044 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 10:35:35,045 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 4036 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6593 mSolverCounterSat, 1794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4036 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 8387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1794 IncrementalHoareTripleChecker+Valid, 6593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:35,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4036 Valid, 181 Invalid, 8387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1794 Valid, 6593 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-04-01 10:35:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2023-04-01 10:35:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4607. [2023-04-01 10:35:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4531 states have (on average 1.414036636504083) internal successors, (6407), 4537 states have internal predecessors, (6407), 23 states have call successors, (23), 23 states have call predecessors, (23), 52 states have return successors, (137), 46 states have call predecessors, (137), 22 states have call successors, (137) [2023-04-01 10:35:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 6567 transitions. [2023-04-01 10:35:35,157 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 6567 transitions. Word has length 21 [2023-04-01 10:35:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:35,158 INFO L495 AbstractCegarLoop]: Abstraction has 4607 states and 6567 transitions. [2023-04-01 10:35:35,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 10:35:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 6567 transitions. [2023-04-01 10:35:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 10:35:35,159 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:35,159 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:35:35,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:35:35,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:35,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash -646261179, now seen corresponding path program 1 times [2023-04-01 10:35:35,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:35,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681030043] [2023-04-01 10:35:35,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:35,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:35,321 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 10:35:35,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:35,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681030043] [2023-04-01 10:35:35,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681030043] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:35,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:35,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:35:35,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713320182] [2023-04-01 10:35:35,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:35,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:35,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:35,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:35:35,322 INFO L87 Difference]: Start difference. First operand 4607 states and 6567 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 10:35:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:41,641 INFO L93 Difference]: Finished difference Result 14148 states and 20540 transitions. [2023-04-01 10:35:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:35:41,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 10:35:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:41,687 INFO L225 Difference]: With dead ends: 14148 [2023-04-01 10:35:41,687 INFO L226 Difference]: Without dead ends: 9546 [2023-04-01 10:35:41,697 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 10:35:41,698 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 3495 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 7164 mSolverCounterSat, 1101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 8265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1101 IncrementalHoareTripleChecker+Valid, 7164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:41,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 175 Invalid, 8265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1101 Valid, 7164 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-04-01 10:35:41,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9546 states. [2023-04-01 10:35:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9546 to 8592. [2023-04-01 10:35:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8592 states, 8362 states have (on average 1.4227457546041617) internal successors, (11897), 8395 states have internal predecessors, (11897), 40 states have call successors, (40), 40 states have call predecessors, (40), 189 states have return successors, (602), 156 states have call predecessors, (602), 39 states have call successors, (602) [2023-04-01 10:35:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8592 states to 8592 states and 12539 transitions. [2023-04-01 10:35:42,030 INFO L78 Accepts]: Start accepts. Automaton has 8592 states and 12539 transitions. Word has length 23 [2023-04-01 10:35:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:42,031 INFO L495 AbstractCegarLoop]: Abstraction has 8592 states and 12539 transitions. [2023-04-01 10:35:42,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 10:35:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 8592 states and 12539 transitions. [2023-04-01 10:35:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 10:35:42,032 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:42,032 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] [2023-04-01 10:35:42,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:35:42,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:42,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:42,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1709145029, now seen corresponding path program 1 times [2023-04-01 10:35:42,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:42,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864082019] [2023-04-01 10:35:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:42,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:42,234 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 10:35:42,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:42,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864082019] [2023-04-01 10:35:42,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864082019] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:42,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:35:42,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:35:42,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074476584] [2023-04-01 10:35:42,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:42,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:42,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:42,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:42,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:35:42,236 INFO L87 Difference]: Start difference. First operand 8592 states and 12539 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 10:35:49,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:49,222 INFO L93 Difference]: Finished difference Result 26245 states and 39095 transitions. [2023-04-01 10:35:49,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:35:49,222 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 33 [2023-04-01 10:35:49,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:49,266 INFO L225 Difference]: With dead ends: 26245 [2023-04-01 10:35:49,266 INFO L226 Difference]: Without dead ends: 17658 [2023-04-01 10:35:49,279 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 10:35:49,280 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 5995 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 6471 mSolverCounterSat, 703 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5995 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 7174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 703 IncrementalHoareTripleChecker+Valid, 6471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:49,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5995 Valid, 147 Invalid, 7174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [703 Valid, 6471 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-04-01 10:35:49,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17658 states. [2023-04-01 10:35:49,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17658 to 17126. [2023-04-01 10:35:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17126 states, 16569 states have (on average 1.3635705232663407) internal successors, (22593), 16669 states have internal predecessors, (22593), 76 states have call successors, (76), 76 states have call predecessors, (76), 480 states have return successors, (1564), 380 states have call predecessors, (1564), 75 states have call successors, (1564) [2023-04-01 10:35:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17126 states to 17126 states and 24233 transitions. [2023-04-01 10:35:49,575 INFO L78 Accepts]: Start accepts. Automaton has 17126 states and 24233 transitions. Word has length 33 [2023-04-01 10:35:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:49,576 INFO L495 AbstractCegarLoop]: Abstraction has 17126 states and 24233 transitions. [2023-04-01 10:35:49,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 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 10:35:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 17126 states and 24233 transitions. [2023-04-01 10:35:49,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-01 10:35:49,579 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:49,580 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:35:49,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:35:49,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:49,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:49,580 INFO L85 PathProgramCache]: Analyzing trace with hash 901655146, now seen corresponding path program 1 times [2023-04-01 10:35:49,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:49,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904739177] [2023-04-01 10:35:49,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:49,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:35:49,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:49,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904739177] [2023-04-01 10:35:49,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904739177] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:35:49,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071778201] [2023-04-01 10:35:49,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:49,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:35:49,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:35:49,771 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 10:35:49,777 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 10:35:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:49,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:35:49,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:35:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:35:49,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:35:49,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071778201] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:35:49,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:35:49,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:35:49,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893259746] [2023-04-01 10:35:49,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:35:49,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:35:49,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:35:49,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:35:49,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:35:49,974 INFO L87 Difference]: Start difference. First operand 17126 states and 24233 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:35:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:35:57,128 INFO L93 Difference]: Finished difference Result 46953 states and 69710 transitions. [2023-04-01 10:35:57,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:35:57,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 60 [2023-04-01 10:35:57,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:35:57,203 INFO L225 Difference]: With dead ends: 46953 [2023-04-01 10:35:57,203 INFO L226 Difference]: Without dead ends: 29832 [2023-04-01 10:35:57,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:35:57,229 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 3504 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 5917 mSolverCounterSat, 3178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3504 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 9095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3178 IncrementalHoareTripleChecker+Valid, 5917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:35:57,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3504 Valid, 135 Invalid, 9095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3178 Valid, 5917 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-04-01 10:35:57,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29832 states. [2023-04-01 10:35:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29832 to 29383. [2023-04-01 10:35:57,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29383 states, 28350 states have (on average 1.3067372134038802) internal successors, (37046), 28547 states have internal predecessors, (37046), 126 states have call successors, (126), 126 states have call predecessors, (126), 906 states have return successors, (3790), 709 states have call predecessors, (3790), 125 states have call successors, (3790) [2023-04-01 10:35:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29383 states to 29383 states and 40962 transitions. [2023-04-01 10:35:57,640 INFO L78 Accepts]: Start accepts. Automaton has 29383 states and 40962 transitions. Word has length 60 [2023-04-01 10:35:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:35:57,641 INFO L495 AbstractCegarLoop]: Abstraction has 29383 states and 40962 transitions. [2023-04-01 10:35:57,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:35:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 29383 states and 40962 transitions. [2023-04-01 10:35:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2023-04-01 10:35:57,651 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:35:57,651 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:35:57,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 10:35:57,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:35:57,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:35:57,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:35:57,857 INFO L85 PathProgramCache]: Analyzing trace with hash 619630993, now seen corresponding path program 1 times [2023-04-01 10:35:57,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:35:57,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427316724] [2023-04-01 10:35:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:57,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:35:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:58,176 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 56 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 10:35:58,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:35:58,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427316724] [2023-04-01 10:35:58,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427316724] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:35:58,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101835802] [2023-04-01 10:35:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:35:58,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:35:58,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:35:58,178 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 10:35:58,180 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 10:35:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:35:58,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:35:58,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:35:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:35:58,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:35:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 56 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 10:35:58,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101835802] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:35:58,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [305841704] [2023-04-01 10:35:58,580 INFO L159 IcfgInterpreter]: Started Sifa with 171 locations of interest [2023-04-01 10:35:58,580 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:35:58,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:35:58,585 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:35:58,585 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:35:58,816 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 88 for LOIs [2023-04-01 10:35:59,126 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 20