/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem18_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:27:46,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:27:46,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:27:46,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:27:46,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:27:46,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:27:46,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:27:46,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:27:46,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:27:46,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:27:46,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:27:46,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:27:46,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:27:46,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:27:46,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:27:46,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:27:46,081 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:27:46,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:27:46,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:27:46,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:27:46,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:27:46,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:27:46,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:27:46,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:27:46,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 04:27:46,099 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:27:46,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:27:46,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:27:46,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:27:46,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:27:46,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:27:46,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:27:46,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:27:46,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:27:46,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:27:46,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:27:46,104 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:27:46,127 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:27:46,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:27:46,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:27:46,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:27:46,129 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:27:46,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:27:46,129 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:27:46,129 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:27:46,129 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:27:46,129 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:27:46,130 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:27:46,130 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:27:46,130 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:27:46,130 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:27:46,130 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:27:46,130 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:27:46,130 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:27:46,130 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:27:46,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:27:46,131 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:27:46,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:27:46,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:27:46,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:27:46,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:27:46,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:27:46,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:27:46,131 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:27:46,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:27:46,132 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:27:46,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:27:46,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:27:46,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:27:46,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:27:46,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:27:46,132 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:27:46,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:27:46,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:27:46,132 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:27:46,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:27:46,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:27:46,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:27:46,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:27:46,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:27:46,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:27:46,315 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:27:46,315 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:27:46,316 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:27:46,317 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label38.c [2023-04-01 04:27:47,287 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:27:47,630 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:27:47,631 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label38.c [2023-04-01 04:27:47,652 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdfd52cde/35e961ef81a048bab3e7e1594b889842/FLAG858ae18ba [2023-04-01 04:27:47,666 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdfd52cde/35e961ef81a048bab3e7e1594b889842 [2023-04-01 04:27:47,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:27:47,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:27:47,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:27:47,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:27:47,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:27:47,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:27:47" (1/1) ... [2023-04-01 04:27:47,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70050a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:47, skipping insertion in model container [2023-04-01 04:27:47,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:27:47" (1/1) ... [2023-04-01 04:27:47,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:27:47,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:27:47,940 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/Problem18_label38.c[2385,2398] [2023-04-01 04:27:48,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:27:48,465 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:27:48,475 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/Problem18_label38.c[2385,2398] [2023-04-01 04:27:48,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:27:48,681 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:27:48,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:48 WrapperNode [2023-04-01 04:27:48,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:27:48,683 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:27:48,683 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:27:48,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:27:48,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:48" (1/1) ... [2023-04-01 04:27:48,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:48" (1/1) ... [2023-04-01 04:27:48,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:48" (1/1) ... [2023-04-01 04:27:48,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:48" (1/1) ... [2023-04-01 04:27:48,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:48" (1/1) ... [2023-04-01 04:27:48,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:48" (1/1) ... [2023-04-01 04:27:48,820 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:48" (1/1) ... [2023-04-01 04:27:48,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:48" (1/1) ... [2023-04-01 04:27:48,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:27:48,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:27:48,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:27:48,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:27:48,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:48" (1/1) ... [2023-04-01 04:27:48,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:27:48,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:27:48,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:27:48,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:27:48,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:27:48,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:27:48,912 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:27:48,912 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:27:48,912 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:27:48,912 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:27:48,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:27:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:27:48,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:27:48,981 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:27:48,983 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:27:51,247 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:27:57,084 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:27:57,084 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:27:57,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:27:57 BoogieIcfgContainer [2023-04-01 04:27:57,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:27:57,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:27:57,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:27:57,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:27:57,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:27:47" (1/3) ... [2023-04-01 04:27:57,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb5a071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:27:57, skipping insertion in model container [2023-04-01 04:27:57,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:48" (2/3) ... [2023-04-01 04:27:57,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb5a071 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:27:57, skipping insertion in model container [2023-04-01 04:27:57,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:27:57" (3/3) ... [2023-04-01 04:27:57,095 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label38.c [2023-04-01 04:27:57,109 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:27:57,109 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:27:57,165 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:27:57,171 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;@30c72b94, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:27:57,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:27:57,178 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:27:57,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:27:57,183 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:57,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:27:57,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:57,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:57,190 INFO L85 PathProgramCache]: Analyzing trace with hash 510740196, now seen corresponding path program 1 times [2023-04-01 04:27:57,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:57,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794981143] [2023-04-01 04:27:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:57,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:57,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:57,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:57,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794981143] [2023-04-01 04:27:57,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794981143] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:57,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:27:57,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:27:57,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73495088] [2023-04-01 04:27:57,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:57,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:27:57,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:57,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:27:57,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:27:57,461 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:27:59,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:59,343 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 04:27:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:27:59,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:27:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:59,361 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 04:27:59,362 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 04:27:59,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:27:59,369 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 515 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:59,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 339 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 04:27:59,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 04:27:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-01 04:27:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6519337016574585) internal successors, (1495), 905 states have internal predecessors, (1495), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 04:27:59,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1512 transitions. [2023-04-01 04:27:59,438 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1512 transitions. Word has length 11 [2023-04-01 04:27:59,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:59,438 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1512 transitions. [2023-04-01 04:27:59,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:27:59,438 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1512 transitions. [2023-04-01 04:27:59,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:27:59,445 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:59,445 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 04:27:59,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:27:59,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:59,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:59,446 INFO L85 PathProgramCache]: Analyzing trace with hash 701490306, now seen corresponding path program 1 times [2023-04-01 04:27:59,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:59,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047430720] [2023-04-01 04:27:59,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:59,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:59,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:59,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047430720] [2023-04-01 04:27:59,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047430720] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:59,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:27:59,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:27:59,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439955087] [2023-04-01 04:27:59,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:59,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:27:59,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:59,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:27:59,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:27:59,570 INFO L87 Difference]: Start difference. First operand 919 states and 1512 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 04:28:01,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:28:01,954 INFO L93 Difference]: Finished difference Result 2781 states and 4622 transitions. [2023-04-01 04:28:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:28:01,954 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 04:28:01,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:28:01,962 INFO L225 Difference]: With dead ends: 2781 [2023-04-01 04:28:01,963 INFO L226 Difference]: Without dead ends: 1867 [2023-04-01 04:28:01,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:28:01,966 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1548 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:28:01,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 83 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 04:28:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2023-04-01 04:28:02,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1822. [2023-04-01 04:28:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1792 states have (on average 1.5412946428571428) internal successors, (2762), 1796 states have internal predecessors, (2762), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (50), 14 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-01 04:28:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2823 transitions. [2023-04-01 04:28:02,040 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2823 transitions. Word has length 21 [2023-04-01 04:28:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:28:02,040 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2823 transitions. [2023-04-01 04:28:02,041 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 04:28:02,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2823 transitions. [2023-04-01 04:28:02,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:28:02,042 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:02,042 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] [2023-04-01 04:28:02,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:28:02,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:02,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:02,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2108247610, now seen corresponding path program 1 times [2023-04-01 04:28:02,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:02,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883126347] [2023-04-01 04:28:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:02,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:28:02,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:02,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883126347] [2023-04-01 04:28:02,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883126347] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:28:02,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:28:02,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:28:02,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188373259] [2023-04-01 04:28:02,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:28:02,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:28:02,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:28:02,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:28:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:28:02,176 INFO L87 Difference]: Start difference. First operand 1822 states and 2823 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:28:04,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:28:04,300 INFO L93 Difference]: Finished difference Result 5051 states and 8054 transitions. [2023-04-01 04:28:04,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:28:04,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-04-01 04:28:04,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:28:04,314 INFO L225 Difference]: With dead ends: 5051 [2023-04-01 04:28:04,314 INFO L226 Difference]: Without dead ends: 3234 [2023-04-01 04:28:04,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:28:04,324 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1718 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:28:04,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 66 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-04-01 04:28:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2023-04-01 04:28:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3207. [2023-04-01 04:28:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3981598984771573) internal successors, (4407), 3163 states have internal predecessors, (4407), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (145), 26 states have call predecessors, (145), 16 states have call successors, (145) [2023-04-01 04:28:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4569 transitions. [2023-04-01 04:28:04,400 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4569 transitions. Word has length 25 [2023-04-01 04:28:04,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:28:04,400 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4569 transitions. [2023-04-01 04:28:04,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:28:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4569 transitions. [2023-04-01 04:28:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 04:28:04,403 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:04,403 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] [2023-04-01 04:28:04,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:28:04,403 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:04,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:04,404 INFO L85 PathProgramCache]: Analyzing trace with hash -167007331, now seen corresponding path program 1 times [2023-04-01 04:28:04,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:04,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655935009] [2023-04-01 04:28:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:04,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:28:04,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:04,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655935009] [2023-04-01 04:28:04,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655935009] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:28:04,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:28:04,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:28:04,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828059510] [2023-04-01 04:28:04,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:28:04,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:28:04,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:28:04,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:28:04,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:28:04,511 INFO L87 Difference]: Start difference. First operand 3207 states and 4569 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 04:28:05,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:28:05,965 INFO L93 Difference]: Finished difference Result 6434 states and 9164 transitions. [2023-04-01 04:28:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:28:05,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 58 [2023-04-01 04:28:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:28:05,976 INFO L225 Difference]: With dead ends: 6434 [2023-04-01 04:28:05,976 INFO L226 Difference]: Without dead ends: 3232 [2023-04-01 04:28:05,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:28:05,987 INFO L413 NwaCegarLoop]: 764 mSDtfsCounter, 503 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1377 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:28:05,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 786 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1377 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:28:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2023-04-01 04:28:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3207. [2023-04-01 04:28:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3651649746192893) internal successors, (4303), 3163 states have internal predecessors, (4303), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (132), 26 states have call predecessors, (132), 16 states have call successors, (132) [2023-04-01 04:28:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4452 transitions. [2023-04-01 04:28:06,062 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4452 transitions. Word has length 58 [2023-04-01 04:28:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:28:06,063 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4452 transitions. [2023-04-01 04:28:06,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 04:28:06,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4452 transitions. [2023-04-01 04:28:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-04-01 04:28:06,067 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:06,067 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:28:06,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 04:28:06,068 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:06,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1207798277, now seen corresponding path program 1 times [2023-04-01 04:28:06,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:06,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033038641] [2023-04-01 04:28:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:06,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:06,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 04:28:06,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:06,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033038641] [2023-04-01 04:28:06,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033038641] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:28:06,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:28:06,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:28:06,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059793176] [2023-04-01 04:28:06,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:28:06,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:28:06,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:28:06,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:28:06,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:28:06,217 INFO L87 Difference]: Start difference. First operand 3207 states and 4452 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:28:07,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:28:07,842 INFO L93 Difference]: Finished difference Result 9127 states and 12555 transitions. [2023-04-01 04:28:07,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:28:07,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2023-04-01 04:28:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:28:07,865 INFO L225 Difference]: With dead ends: 9127 [2023-04-01 04:28:07,866 INFO L226 Difference]: Without dead ends: 5925 [2023-04-01 04:28:07,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:28:07,879 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 451 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:28:07,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 905 Invalid, 1848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-01 04:28:07,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5925 states. [2023-04-01 04:28:07,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5925 to 5866. [2023-04-01 04:28:07,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5866 states, 5778 states have (on average 1.248355832467982) internal successors, (7213), 5797 states have internal predecessors, (7213), 29 states have call successors, (29), 29 states have call predecessors, (29), 58 states have return successors, (303), 39 states have call predecessors, (303), 28 states have call successors, (303) [2023-04-01 04:28:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5866 states to 5866 states and 7545 transitions. [2023-04-01 04:28:07,976 INFO L78 Accepts]: Start accepts. Automaton has 5866 states and 7545 transitions. Word has length 68 [2023-04-01 04:28:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:28:07,977 INFO L495 AbstractCegarLoop]: Abstraction has 5866 states and 7545 transitions. [2023-04-01 04:28:07,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:28:07,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5866 states and 7545 transitions. [2023-04-01 04:28:07,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-04-01 04:28:07,982 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:28:07,983 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:28:07,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:28:07,983 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:28:07,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:28:07,983 INFO L85 PathProgramCache]: Analyzing trace with hash 81487256, now seen corresponding path program 1 times [2023-04-01 04:28:07,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:28:07,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720729639] [2023-04-01 04:28:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:07,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:28:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:28:08,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:28:08,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720729639] [2023-04-01 04:28:08,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720729639] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:28:08,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951981986] [2023-04-01 04:28:08,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:28:08,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:28:08,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:28:08,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:28:08,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:28:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:28:08,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:28:08,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:28:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:28:08,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:28:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:28:08,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951981986] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:28:08,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [861252905] [2023-04-01 04:28:08,473 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-04-01 04:28:08,473 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:28:08,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:28:08,480 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:28:08,480 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:28:08,633 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-01 04:28:08,763 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2023-04-01 04:28:30,296 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 47