/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/Problem12_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:03:35,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:03:35,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:03:35,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:03:35,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:03:35,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:03:35,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:03:35,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:03:35,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:03:35,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:03:35,979 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:03:35,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:03:35,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:03:35,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:03:35,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:03:35,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:03:35,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:03:35,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:03:35,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:03:35,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:03:35,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:03:35,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:03:35,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:03:35,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:03:36,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:03:36,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:03:36,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:03:36,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:03:36,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:03:36,004 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:03:36,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:03:36,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:03:36,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:03:36,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:03:36,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:03:36,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:03:36,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:03:36,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:03:36,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:03:36,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:03:36,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:03:36,013 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 04:03:36,055 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:03:36,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:03:36,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:03:36,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:03:36,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:03:36,057 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:03:36,057 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:03:36,057 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:03:36,057 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:03:36,057 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:03:36,058 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:03:36,058 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:03:36,058 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:03:36,059 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:03:36,059 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:03:36,059 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:03:36,059 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:03:36,059 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:03:36,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:03:36,060 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:03:36,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:03:36,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:03:36,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:03:36,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:03:36,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:03:36,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:03:36,061 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:03:36,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:03:36,061 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:03:36,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:03:36,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:03:36,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:03:36,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:03:36,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:03:36,062 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:03:36,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:03:36,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:03:36,062 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:03:36,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:03:36,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:03:36,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:03:36,063 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:03:36,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:03:36,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:03:36,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:03:36,344 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:03:36,345 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:03:36,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label56.c [2023-04-01 04:03:37,580 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:03:38,006 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:03:38,007 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label56.c [2023-04-01 04:03:38,035 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2be261a4/f2ae095b875f4bfa8b96577a9d5592a8/FLAG2db5a62e0 [2023-04-01 04:03:38,052 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2be261a4/f2ae095b875f4bfa8b96577a9d5592a8 [2023-04-01 04:03:38,054 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:03:38,055 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:03:38,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:03:38,056 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:03:38,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:03:38,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:03:38" (1/1) ... [2023-04-01 04:03:38,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47d6f3ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:38, skipping insertion in model container [2023-04-01 04:03:38,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:03:38" (1/1) ... [2023-04-01 04:03:38,067 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:03:38,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:03:38,483 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label56.c[6959,6972] [2023-04-01 04:03:39,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:03:39,158 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:03:39,185 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label56.c[6959,6972] [2023-04-01 04:03:39,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:03:39,597 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:03:39,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:39 WrapperNode [2023-04-01 04:03:39,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:03:39,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:03:39,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:03:39,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:03:39,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:39" (1/1) ... [2023-04-01 04:03:39,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:39" (1/1) ... [2023-04-01 04:03:39,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:39" (1/1) ... [2023-04-01 04:03:39,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:39" (1/1) ... [2023-04-01 04:03:39,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:39" (1/1) ... [2023-04-01 04:03:39,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:39" (1/1) ... [2023-04-01 04:03:39,798 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:39" (1/1) ... [2023-04-01 04:03:39,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:39" (1/1) ... [2023-04-01 04:03:39,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:03:39,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:03:39,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:03:39,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:03:39,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:39" (1/1) ... [2023-04-01 04:03:39,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:03:39,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:39,871 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 04:03:39,881 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 04:03:39,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:03:39,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:03:39,914 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:03:39,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:03:39,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:03:39,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:03:39,915 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:03:39,915 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:03:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:03:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:03:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:03:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:03:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:03:39,915 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:03:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:03:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:03:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:03:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:03:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:03:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:03:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:03:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:03:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:03:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:03:39,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:03:40,034 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:03:40,036 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:03:43,781 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:03:44,469 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:03:44,469 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:03:44,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:03:44 BoogieIcfgContainer [2023-04-01 04:03:44,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:03:44,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:03:44,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:03:44,482 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:03:44,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:03:38" (1/3) ... [2023-04-01 04:03:44,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4724dc73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:03:44, skipping insertion in model container [2023-04-01 04:03:44,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:39" (2/3) ... [2023-04-01 04:03:44,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4724dc73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:03:44, skipping insertion in model container [2023-04-01 04:03:44,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:03:44" (3/3) ... [2023-04-01 04:03:44,484 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label56.c [2023-04-01 04:03:44,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:03:44,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:03:44,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:03:44,574 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;@ba549f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:03:44,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:03:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:03:44,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:03:44,587 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:44,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:03:44,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:44,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:44,593 INFO L85 PathProgramCache]: Analyzing trace with hash 636347330, now seen corresponding path program 1 times [2023-04-01 04:03:44,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:44,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833483856] [2023-04-01 04:03:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:44,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:44,952 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 04:03:44,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:44,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833483856] [2023-04-01 04:03:44,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833483856] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:44,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:44,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:03:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42971075] [2023-04-01 04:03:44,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:44,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:03:44,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:44,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:03:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:03:45,002 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:03:48,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:48,360 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:03:48,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:03:48,364 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 04:03:48,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:48,387 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:03:48,388 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:03:48,394 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 04:03:48,398 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 846 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:48,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 217 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-04-01 04:03:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:03:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 04:03:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.857037037037037) internal successors, (2507), 1350 states have internal predecessors, (2507), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:03:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2530 transitions. [2023-04-01 04:03:48,512 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2530 transitions. Word has length 11 [2023-04-01 04:03:48,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:48,512 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2530 transitions. [2023-04-01 04:03:48,512 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 04:03:48,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2530 transitions. [2023-04-01 04:03:48,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:03:48,514 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:48,514 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 04:03:48,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:03:48,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:48,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:48,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1382039322, now seen corresponding path program 1 times [2023-04-01 04:03:48,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:48,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211904189] [2023-04-01 04:03:48,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:48,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:48,777 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 04:03:48,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:48,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211904189] [2023-04-01 04:03:48,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211904189] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:48,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:48,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:03:48,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626244240] [2023-04-01 04:03:48,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:48,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:48,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:48,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:48,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:03:48,782 INFO L87 Difference]: Start difference. First operand 1368 states and 2530 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 04:03:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:52,752 INFO L93 Difference]: Finished difference Result 4138 states and 7702 transitions. [2023-04-01 04:03:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:03:52,753 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 04:03:52,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:52,769 INFO L225 Difference]: With dead ends: 4138 [2023-04-01 04:03:52,769 INFO L226 Difference]: Without dead ends: 2775 [2023-04-01 04:03:52,773 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 04:03:52,776 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2488 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3906 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 4816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 3906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:52,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2488 Valid, 118 Invalid, 4816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 3906 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-04-01 04:03:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2023-04-01 04:03:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2757. [2023-04-01 04:03:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2715 states have (on average 1.6976058931860036) internal successors, (4609), 2719 states have internal predecessors, (4609), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (77), 22 states have call predecessors, (77), 14 states have call successors, (77) [2023-04-01 04:03:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4701 transitions. [2023-04-01 04:03:52,894 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4701 transitions. Word has length 25 [2023-04-01 04:03:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:52,895 INFO L495 AbstractCegarLoop]: Abstraction has 2757 states and 4701 transitions. [2023-04-01 04:03:52,895 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 04:03:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4701 transitions. [2023-04-01 04:03:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 04:03:52,896 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:52,897 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] [2023-04-01 04:03:52,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:03:52,897 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:52,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:52,899 INFO L85 PathProgramCache]: Analyzing trace with hash -979679307, now seen corresponding path program 1 times [2023-04-01 04:03:52,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:52,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270043327] [2023-04-01 04:03:52,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:52,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:53,091 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 04:03:53,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:53,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270043327] [2023-04-01 04:03:53,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270043327] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:53,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:53,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:03:53,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311627437] [2023-04-01 04:03:53,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:53,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:53,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:53,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:53,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:03:53,096 INFO L87 Difference]: Start difference. First operand 2757 states and 4701 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:03:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:56,770 INFO L93 Difference]: Finished difference Result 7729 states and 13220 transitions. [2023-04-01 04:03:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:03:56,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 30 [2023-04-01 04:03:56,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:56,800 INFO L225 Difference]: With dead ends: 7729 [2023-04-01 04:03:56,801 INFO L226 Difference]: Without dead ends: 4977 [2023-04-01 04:03:56,812 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 04:03:56,815 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2452 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 1261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1261 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:56,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 95 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1261 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-04-01 04:03:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2023-04-01 04:03:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4896. [2023-04-01 04:03:56,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4789 states have (on average 1.579661724785968) internal successors, (7565), 4809 states have internal predecessors, (7565), 24 states have call successors, (24), 24 states have call predecessors, (24), 82 states have return successors, (335), 62 states have call predecessors, (335), 23 states have call successors, (335) [2023-04-01 04:03:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 7924 transitions. [2023-04-01 04:03:56,991 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 7924 transitions. Word has length 30 [2023-04-01 04:03:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:56,991 INFO L495 AbstractCegarLoop]: Abstraction has 4896 states and 7924 transitions. [2023-04-01 04:03:56,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:03:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 7924 transitions. [2023-04-01 04:03:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:03:56,993 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:56,994 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:03:56,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:03:56,994 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:56,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:56,997 INFO L85 PathProgramCache]: Analyzing trace with hash 56759654, now seen corresponding path program 1 times [2023-04-01 04:03:56,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:56,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032418382] [2023-04-01 04:03:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:56,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:03:57,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:57,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032418382] [2023-04-01 04:03:57,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032418382] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:03:57,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546546577] [2023-04-01 04:03:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:57,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:03:57,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:57,157 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 04:03:57,176 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 04:03:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:57,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:03:57,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:03:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:03:57,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:03:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:03:57,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546546577] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:03:57,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1966100442] [2023-04-01 04:03:57,505 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-01 04:03:57,505 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:03:57,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:03:57,512 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:03:57,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:03:57,750 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 04:03:57,962 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2023-04-01 04:04:05,422 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 93364 conjuctions. This might take some time... [2023-04-01 04:04:13,983 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 689 conjuctions. [2023-04-01 04:04:27,510 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11