/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem18_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:30:18,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:30:18,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:30:18,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:30:18,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:30:18,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:30:18,955 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:30:18,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:30:18,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:30:18,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:30:18,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:30:18,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:30:18,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:30:18,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:30:18,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:30:18,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:30:18,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:30:18,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:30:18,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:30:18,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:30:18,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:30:18,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:30:18,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:30:18,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:30:18,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:30:18,981 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:30:18,981 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:30:18,981 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:30:18,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:30:18,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:30:18,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:30:18,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:30:18,983 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:30:18,983 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:30:18,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:30:18,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:30:18,984 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:30:18,984 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:30:18,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:30:18,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:30:18,985 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:30:18,986 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:30:19,002 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:30:19,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:30:19,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:30:19,003 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:30:19,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:30:19,004 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:30:19,004 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:30:19,004 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:30:19,004 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:30:19,004 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:30:19,005 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:30:19,005 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:30:19,005 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:30:19,005 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:30:19,005 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:30:19,005 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:30:19,005 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:30:19,006 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:30:19,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:30:19,006 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:30:19,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:30:19,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:30:19,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:30:19,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:30:19,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:30:19,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:30:19,007 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:30:19,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:30:19,007 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:30:19,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:30:19,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:30:19,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:30:19,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:30:19,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:30:19,008 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:30:19,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:30:19,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:30:19,008 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:30:19,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:30:19,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:30:19,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:30:19,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:30:19,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:30:19,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:30:19,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:30:19,242 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:30:19,242 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:30:19,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label23.c [2023-04-01 10:30:20,201 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:30:20,567 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:30:20,567 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label23.c [2023-04-01 10:30:20,590 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aa3c9708/8e35a266334543b29674d88d8d4cf5c0/FLAG52666206c [2023-04-01 10:30:20,606 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aa3c9708/8e35a266334543b29674d88d8d4cf5c0 [2023-04-01 10:30:20,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:30:20,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:30:20,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:30:20,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:30:20,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:30:20,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:30:20" (1/1) ... [2023-04-01 10:30:20,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@418ba6dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:20, skipping insertion in model container [2023-04-01 10:30:20,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:30:20" (1/1) ... [2023-04-01 10:30:20,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:30:20,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:30:20,885 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_label23.c[5791,5804] [2023-04-01 10:30:21,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:30:21,301 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:30:21,320 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_label23.c[5791,5804] [2023-04-01 10:30:21,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:30:21,564 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:30:21,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:21 WrapperNode [2023-04-01 10:30:21,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:30:21,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:30:21,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:30:21,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:30:21,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:21" (1/1) ... [2023-04-01 10:30:21,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:21" (1/1) ... [2023-04-01 10:30:21,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:21" (1/1) ... [2023-04-01 10:30:21,611 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:21" (1/1) ... [2023-04-01 10:30:21,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:21" (1/1) ... [2023-04-01 10:30:21,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:21" (1/1) ... [2023-04-01 10:30:21,727 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:21" (1/1) ... [2023-04-01 10:30:21,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:21" (1/1) ... [2023-04-01 10:30:21,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:30:21,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:30:21,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:30:21,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:30:21,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:21" (1/1) ... [2023-04-01 10:30:21,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:30:21,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:30:21,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:30:21,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:30:21,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:30:21,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:30:21,812 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:30:21,812 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:30:21,812 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:30:21,813 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:30:21,813 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:30:21,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:30:21,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:30:21,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:30:21,892 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:30:21,893 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:30:24,164 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:30:30,177 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:30:30,177 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:30:30,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:30:30 BoogieIcfgContainer [2023-04-01 10:30:30,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:30:30,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:30:30,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:30:30,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:30:30,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:30:20" (1/3) ... [2023-04-01 10:30:30,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b206671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:30:30, skipping insertion in model container [2023-04-01 10:30:30,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:21" (2/3) ... [2023-04-01 10:30:30,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b206671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:30:30, skipping insertion in model container [2023-04-01 10:30:30,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:30:30" (3/3) ... [2023-04-01 10:30:30,185 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label23.c [2023-04-01 10:30:30,198 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:30:30,199 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:30:30,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:30:30,243 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;@76c79aa0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:30:30,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:30:30,247 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 10:30:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:30:30,252 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:30:30,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:30:30,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:30:30,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:30:30,257 INFO L85 PathProgramCache]: Analyzing trace with hash 314235651, now seen corresponding path program 1 times [2023-04-01 10:30:30,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:30:30,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562212275] [2023-04-01 10:30:30,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:30,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:30:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:30:30,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:30:30,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562212275] [2023-04-01 10:30:30,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562212275] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:30:30,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:30:30,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:30:30,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19837082] [2023-04-01 10:30:30,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:30:30,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:30:30,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:30:30,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:30:30,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:30:30,566 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 10:30:32,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:30:32,488 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 10:30:32,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:30:32,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:30:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:30:32,503 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 10:30:32,503 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 10:30:32,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:30:32,511 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 472 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:30:32,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 366 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 10:30:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 10:30:32,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-01 10:30:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6209944751381216) internal successors, (1467), 905 states have internal predecessors, (1467), 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 10:30:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1484 transitions. [2023-04-01 10:30:32,587 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1484 transitions. Word has length 11 [2023-04-01 10:30:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:30:32,587 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1484 transitions. [2023-04-01 10:30:32,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:30:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1484 transitions. [2023-04-01 10:30:32,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 10:30:32,593 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:30:32,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:30:32,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:30:32,593 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:30:32,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:30:32,594 INFO L85 PathProgramCache]: Analyzing trace with hash 380864574, now seen corresponding path program 1 times [2023-04-01 10:30:32,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:30:32,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722384584] [2023-04-01 10:30:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:32,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:30:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:30:32,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:30:32,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722384584] [2023-04-01 10:30:32,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722384584] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:30:32,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:30:32,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:30:32,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566615227] [2023-04-01 10:30:32,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:30:32,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:30:32,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:30:32,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:30:32,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:30:32,782 INFO L87 Difference]: Start difference. First operand 919 states and 1484 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:30:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:30:35,542 INFO L93 Difference]: Finished difference Result 2797 states and 4545 transitions. [2023-04-01 10:30:35,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:30:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22 [2023-04-01 10:30:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:30:35,551 INFO L225 Difference]: With dead ends: 2797 [2023-04-01 10:30:35,551 INFO L226 Difference]: Without dead ends: 1883 [2023-04-01 10:30:35,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:30:35,555 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1522 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3163 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 3699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 3163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-04-01 10:30:35,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1522 Valid, 96 Invalid, 3699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 3163 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-04-01 10:30:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2023-04-01 10:30:35,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1843. [2023-04-01 10:30:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1809 states have (on average 1.4151464897733554) internal successors, (2560), 1816 states have internal predecessors, (2560), 11 states have call successors, (11), 11 states have call predecessors, (11), 22 states have return successors, (54), 15 states have call predecessors, (54), 10 states have call successors, (54) [2023-04-01 10:30:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2625 transitions. [2023-04-01 10:30:35,612 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2625 transitions. Word has length 22 [2023-04-01 10:30:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:30:35,612 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2625 transitions. [2023-04-01 10:30:35,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:30:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2625 transitions. [2023-04-01 10:30:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 10:30:35,614 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:30:35,614 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:30:35,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:30:35,615 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:30:35,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:30:35,616 INFO L85 PathProgramCache]: Analyzing trace with hash -986427976, now seen corresponding path program 1 times [2023-04-01 10:30:35,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:30:35,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353644146] [2023-04-01 10:30:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:35,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:30:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:30:35,831 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:30:35,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353644146] [2023-04-01 10:30:35,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353644146] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:30:35,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14588168] [2023-04-01 10:30:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:35,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:30:35,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:30:35,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:30:35,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:30:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:35,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:30:35,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:30:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:30:36,024 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:30:36,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14588168] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:30:36,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:30:36,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:30:36,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446899200] [2023-04-01 10:30:36,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:30:36,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:30:36,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:30:36,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:30:36,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:30:36,025 INFO L87 Difference]: Start difference. First operand 1843 states and 2625 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:30:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:30:38,332 INFO L93 Difference]: Finished difference Result 5615 states and 8143 transitions. [2023-04-01 10:30:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:30:38,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2023-04-01 10:30:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:30:38,348 INFO L225 Difference]: With dead ends: 5615 [2023-04-01 10:30:38,349 INFO L226 Difference]: Without dead ends: 3777 [2023-04-01 10:30:38,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 10:30:38,355 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1574 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:30:38,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1574 Valid, 59 Invalid, 3458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 10:30:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2023-04-01 10:30:38,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3658. [2023-04-01 10:30:38,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 3573 states have (on average 1.2555275678701372) internal successors, (4486), 3601 states have internal predecessors, (4486), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 37 states have call predecessors, (195), 18 states have call successors, (195) [2023-04-01 10:30:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 4700 transitions. [2023-04-01 10:30:38,444 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 4700 transitions. Word has length 32 [2023-04-01 10:30:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:30:38,444 INFO L495 AbstractCegarLoop]: Abstraction has 3658 states and 4700 transitions. [2023-04-01 10:30:38,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:30:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 4700 transitions. [2023-04-01 10:30:38,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 10:30:38,446 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:30:38,446 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] [2023-04-01 10:30:38,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 10:30:38,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:30:38,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:30:38,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:30:38,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1165434543, now seen corresponding path program 1 times [2023-04-01 10:30:38,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:30:38,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935544425] [2023-04-01 10:30:38,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:38,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:30:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:30:38,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:30:38,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935544425] [2023-04-01 10:30:38,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935544425] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:30:38,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:30:38,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 10:30:38,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193026663] [2023-04-01 10:30:38,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:30:38,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 10:30:38,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:30:38,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 10:30:38,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 10:30:38,810 INFO L87 Difference]: Start difference. First operand 3658 states and 4700 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:30:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:30:41,143 INFO L93 Difference]: Finished difference Result 9180 states and 12226 transitions. [2023-04-01 10:30:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:30:41,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 49 [2023-04-01 10:30:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:30:41,161 INFO L225 Difference]: With dead ends: 9180 [2023-04-01 10:30:41,161 INFO L226 Difference]: Without dead ends: 5463 [2023-04-01 10:30:41,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:30:41,171 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 497 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 2681 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 2681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:30:41,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 692 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [705 Valid, 2681 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 10:30:41,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5463 states. [2023-04-01 10:30:41,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5463 to 4897. [2023-04-01 10:30:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4897 states, 4795 states have (on average 1.1453597497393118) internal successors, (5492), 4826 states have internal predecessors, (5492), 27 states have call successors, (27), 27 states have call predecessors, (27), 74 states have return successors, (314), 43 states have call predecessors, (314), 26 states have call successors, (314) [2023-04-01 10:30:41,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4897 states to 4897 states and 5833 transitions. [2023-04-01 10:30:41,260 INFO L78 Accepts]: Start accepts. Automaton has 4897 states and 5833 transitions. Word has length 49 [2023-04-01 10:30:41,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:30:41,260 INFO L495 AbstractCegarLoop]: Abstraction has 4897 states and 5833 transitions. [2023-04-01 10:30:41,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:30:41,261 INFO L276 IsEmpty]: Start isEmpty. Operand 4897 states and 5833 transitions. [2023-04-01 10:30:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 10:30:41,265 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:30:41,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:30:41,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:30:41,266 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:30:41,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:30:41,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1246973034, now seen corresponding path program 1 times [2023-04-01 10:30:41,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:30:41,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918285689] [2023-04-01 10:30:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:41,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:30:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:30:41,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:30:41,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918285689] [2023-04-01 10:30:41,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918285689] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:30:41,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010003095] [2023-04-01 10:30:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:41,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:30:41,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:30:41,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:30:41,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 10:30:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:41,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:30:41,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:30:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:30:41,590 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:30:41,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010003095] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:30:41,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:30:41,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-04-01 10:30:41,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238660333] [2023-04-01 10:30:41,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:30:41,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:30:41,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:30:41,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:30:41,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:30:41,592 INFO L87 Difference]: Start difference. First operand 4897 states and 5833 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:30:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:30:42,781 INFO L93 Difference]: Finished difference Result 10334 states and 12551 transitions. [2023-04-01 10:30:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:30:42,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 74 [2023-04-01 10:30:42,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:30:42,801 INFO L225 Difference]: With dead ends: 10334 [2023-04-01 10:30:42,801 INFO L226 Difference]: Without dead ends: 5442 [2023-04-01 10:30:42,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-04-01 10:30:42,814 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 526 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:30:42,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 533 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 10:30:42,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5442 states. [2023-04-01 10:30:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5442 to 5349. [2023-04-01 10:30:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5349 states, 5243 states have (on average 1.1550638947167653) internal successors, (6056), 5274 states have internal predecessors, (6056), 29 states have call successors, (29), 29 states have call predecessors, (29), 76 states have return successors, (364), 45 states have call predecessors, (364), 28 states have call successors, (364) [2023-04-01 10:30:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5349 states to 5349 states and 6449 transitions. [2023-04-01 10:30:42,920 INFO L78 Accepts]: Start accepts. Automaton has 5349 states and 6449 transitions. Word has length 74 [2023-04-01 10:30:42,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:30:42,920 INFO L495 AbstractCegarLoop]: Abstraction has 5349 states and 6449 transitions. [2023-04-01 10:30:42,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 10:30:42,921 INFO L276 IsEmpty]: Start isEmpty. Operand 5349 states and 6449 transitions. [2023-04-01 10:30:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-04-01 10:30:42,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:30:42,926 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 10:30:42,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 10:30:43,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:30:43,133 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:30:43,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:30:43,134 INFO L85 PathProgramCache]: Analyzing trace with hash -73584520, now seen corresponding path program 1 times [2023-04-01 10:30:43,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:30:43,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529266484] [2023-04-01 10:30:43,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:43,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:30:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 11 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:30:43,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:30:43,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529266484] [2023-04-01 10:30:43,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529266484] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:30:43,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873031000] [2023-04-01 10:30:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:43,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:30:43,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:30:43,492 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:30:43,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 10:30:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:43,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:30:43,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:30:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:30:43,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:30:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 71 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:30:43,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873031000] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:30:43,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1537150691] [2023-04-01 10:30:44,022 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2023-04-01 10:30:44,022 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:30:44,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:30:44,028 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:30:44,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:30:44,256 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs [2023-04-01 10:30:44,529 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49 [2023-04-01 10:30:46,459 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-04-01 10:30:46,826 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 65232 conjuctions. This might take some time... [2023-04-01 10:31:21,679 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 7776 conjuctions.