/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/Problem05_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:33:18,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:33:18,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:33:18,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:33:18,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:33:18,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:33:18,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:33:18,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:33:18,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:33:18,110 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:33:18,112 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:33:18,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:33:18,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:33:18,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:33:18,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:33:18,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:33:18,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:33:18,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:33:18,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:33:18,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:33:18,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:33:18,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:33:18,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:33:18,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:33:18,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:33:18,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:33:18,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:33:18,133 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:33:18,133 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:33:18,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:33:18,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:33:18,134 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:33:18,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:33:18,135 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:33:18,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:33:18,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:33:18,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:33:18,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:33:18,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:33:18,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:33:18,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:33:18,141 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 09:33:18,169 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:33:18,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:33:18,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:33:18,169 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:33:18,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:33:18,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:33:18,170 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:33:18,170 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:33:18,170 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:33:18,170 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:33:18,170 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:33:18,170 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:33:18,170 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:33:18,170 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:33:18,171 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:33:18,171 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:33:18,171 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:33:18,171 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:33:18,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:33:18,171 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:33:18,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:33:18,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:33:18,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:33:18,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:33:18,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:33:18,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:33:18,172 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:33:18,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:33:18,172 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:33:18,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:33:18,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:33:18,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:33:18,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:33:18,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:33:18,173 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:33:18,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:33:18,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:33:18,173 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:33:18,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:33:18,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:33:18,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:33:18,173 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:33:18,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:33:18,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:33:18,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:33:18,381 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:33:18,387 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:33:18,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem05_label20.c [2023-04-01 09:33:19,385 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:33:19,937 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:33:19,937 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem05_label20.c [2023-04-01 09:33:19,975 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f1922120/c08cf57a9907416a986cb3a8cc43d9b8/FLAGc7e4359f5 [2023-04-01 09:33:19,989 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f1922120/c08cf57a9907416a986cb3a8cc43d9b8 [2023-04-01 09:33:19,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:33:19,994 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:33:19,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:33:19,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:33:19,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:33:19,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:33:19" (1/1) ... [2023-04-01 09:33:19,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be49778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:19, skipping insertion in model container [2023-04-01 09:33:19,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:33:19" (1/1) ... [2023-04-01 09:33:20,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:33:20,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:33:21,459 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/Problem05_label20.c[381200,381213] [2023-04-01 09:33:21,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:33:21,480 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:33:22,064 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/Problem05_label20.c[381200,381213] [2023-04-01 09:33:22,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:33:22,104 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:33:22,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:22 WrapperNode [2023-04-01 09:33:22,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:33:22,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:33:22,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:33:22,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:33:22,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:22" (1/1) ... [2023-04-01 09:33:22,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:22" (1/1) ... [2023-04-01 09:33:22,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:22" (1/1) ... [2023-04-01 09:33:22,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:22" (1/1) ... [2023-04-01 09:33:22,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:22" (1/1) ... [2023-04-01 09:33:22,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:22" (1/1) ... [2023-04-01 09:33:22,434 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:22" (1/1) ... [2023-04-01 09:33:22,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:22" (1/1) ... [2023-04-01 09:33:22,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:33:22,548 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:33:22,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:33:22,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:33:22,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:22" (1/1) ... [2023-04-01 09:33:22,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:33:22,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:33:22,606 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 09:33:22,670 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 09:33:22,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:33:22,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:33:22,691 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:33:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:33:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 09:33:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 09:33:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 09:33:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 09:33:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 09:33:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2023-04-01 09:33:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2023-04-01 09:33:22,692 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:33:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:33:22,692 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 09:33:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 09:33:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 09:33:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 09:33:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 09:33:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2023-04-01 09:33:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2023-04-01 09:33:22,693 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:33:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:33:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:33:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:33:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:33:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:33:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:33:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:33:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:33:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:33:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:33:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:33:22,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:33:22,771 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:33:22,780 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:33:27,735 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:33:28,950 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:33:28,951 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:33:28,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:33:28 BoogieIcfgContainer [2023-04-01 09:33:28,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:33:28,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:33:28,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:33:28,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:33:28,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:33:19" (1/3) ... [2023-04-01 09:33:28,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e421116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:33:28, skipping insertion in model container [2023-04-01 09:33:28,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:33:22" (2/3) ... [2023-04-01 09:33:28,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e421116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:33:28, skipping insertion in model container [2023-04-01 09:33:28,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:33:28" (3/3) ... [2023-04-01 09:33:28,963 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label20.c [2023-04-01 09:33:28,975 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:33:28,975 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:33:29,034 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:33:29,039 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;@27ef9680, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:33:29,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:33:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 1681 states, 1659 states have (on average 1.9825195901145267) internal successors, (3289), 1660 states have internal predecessors, (3289), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 09:33:29,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1652 [2023-04-01 09:33:29,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:33:29,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:33:29,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:33:29,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:33:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1963683427, now seen corresponding path program 1 times [2023-04-01 09:33:29,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:33:29,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784826646] [2023-04-01 09:33:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:33:29,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:33:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:33:35,452 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 09:33:35,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:33:35,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784826646] [2023-04-01 09:33:35,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784826646] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:33:35,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:33:35,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:33:35,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312236337] [2023-04-01 09:33:35,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:33:35,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:33:35,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:33:35,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:33:35,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:33:35,491 INFO L87 Difference]: Start difference. First operand has 1681 states, 1659 states have (on average 1.9825195901145267) internal successors, (3289), 1660 states have internal predecessors, (3289), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:33:40,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:33:40,432 INFO L93 Difference]: Finished difference Result 5031 states and 9947 transitions. [2023-04-01 09:33:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:33:40,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1651 [2023-04-01 09:33:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:33:40,456 INFO L225 Difference]: With dead ends: 5031 [2023-04-01 09:33:40,456 INFO L226 Difference]: Without dead ends: 3347 [2023-04-01 09:33:40,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 09:33:40,466 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 207 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 5470 mSolverCounterSat, 1339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 6809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1339 IncrementalHoareTripleChecker+Valid, 5470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:33:40,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 572 Invalid, 6809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1339 Valid, 5470 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-04-01 09:33:40,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2023-04-01 09:33:40,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 3347. [2023-04-01 09:33:40,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3347 states, 3311 states have (on average 1.8248263364542434) internal successors, (6042), 3311 states have internal predecessors, (6042), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (33), 17 states have call predecessors, (33), 17 states have call successors, (33) [2023-04-01 09:33:40,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3347 states to 3347 states and 6093 transitions. [2023-04-01 09:33:40,562 INFO L78 Accepts]: Start accepts. Automaton has 3347 states and 6093 transitions. Word has length 1651 [2023-04-01 09:33:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:33:40,564 INFO L495 AbstractCegarLoop]: Abstraction has 3347 states and 6093 transitions. [2023-04-01 09:33:40,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 546.6666666666666) internal successors, (1640), 2 states have internal predecessors, (1640), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 09:33:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 3347 states and 6093 transitions. [2023-04-01 09:33:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1661 [2023-04-01 09:33:40,619 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:33:40,619 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:33:40,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:33:40,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:33:40,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:33:40,621 INFO L85 PathProgramCache]: Analyzing trace with hash 282511048, now seen corresponding path program 1 times [2023-04-01 09:33:40,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:33:40,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758405231] [2023-04-01 09:33:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:33:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:33:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:33:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:33:42,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:33:42,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758405231] [2023-04-01 09:33:42,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758405231] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:33:42,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:33:42,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:33:42,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306230794] [2023-04-01 09:33:42,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:33:42,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:33:42,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:33:42,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:33:42,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:33:42,937 INFO L87 Difference]: Start difference. First operand 3347 states and 6093 transitions. Second operand has 5 states, 5 states have (on average 329.4) internal successors, (1647), 4 states have internal predecessors, (1647), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:33:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:33:48,691 INFO L93 Difference]: Finished difference Result 10226 states and 18655 transitions. [2023-04-01 09:33:48,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:33:48,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 329.4) internal successors, (1647), 4 states have internal predecessors, (1647), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 1660 [2023-04-01 09:33:48,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:33:48,751 INFO L225 Difference]: With dead ends: 10226 [2023-04-01 09:33:48,751 INFO L226 Difference]: Without dead ends: 6884 [2023-04-01 09:33:48,775 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 09:33:48,777 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 6831 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 8860 mSolverCounterSat, 3038 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6831 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 11898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3038 IncrementalHoareTripleChecker+Valid, 8860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:33:48,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6831 Valid, 203 Invalid, 11898 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3038 Valid, 8860 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-04-01 09:33:48,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6884 states. [2023-04-01 09:33:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6884 to 6819. [2023-04-01 09:33:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6819 states, 6705 states have (on average 1.6956002982848621) internal successors, (11369), 6711 states have internal predecessors, (11369), 34 states have call successors, (34), 34 states have call predecessors, (34), 79 states have return successors, (205), 73 states have call predecessors, (205), 33 states have call successors, (205) [2023-04-01 09:33:49,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6819 states to 6819 states and 11608 transitions. [2023-04-01 09:33:49,104 INFO L78 Accepts]: Start accepts. Automaton has 6819 states and 11608 transitions. Word has length 1660 [2023-04-01 09:33:49,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:33:49,105 INFO L495 AbstractCegarLoop]: Abstraction has 6819 states and 11608 transitions. [2023-04-01 09:33:49,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 329.4) internal successors, (1647), 4 states have internal predecessors, (1647), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 09:33:49,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6819 states and 11608 transitions. [2023-04-01 09:33:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1663 [2023-04-01 09:33:49,181 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:33:49,182 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:33:49,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:33:49,182 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:33:49,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:33:49,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1263920804, now seen corresponding path program 1 times [2023-04-01 09:33:49,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:33:49,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539510684] [2023-04-01 09:33:49,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:33:49,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:33:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:34:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:34:04,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:34:04,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539510684] [2023-04-01 09:34:04,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539510684] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:34:04,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197553752] [2023-04-01 09:34:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:34:04,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:34:04,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:34:04,758 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 09:34:04,759 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 09:34:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:34:05,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 2130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 09:34:05,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:34:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:34:06,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 09:34:06,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197553752] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:34:06,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 09:34:06,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-04-01 09:34:06,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819137476] [2023-04-01 09:34:06,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:34:06,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:34:06,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:34:06,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:34:06,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:34:06,715 INFO L87 Difference]: Start difference. First operand 6819 states and 11608 transitions. Second operand has 3 states, 3 states have (on average 549.6666666666666) internal successors, (1649), 3 states have internal predecessors, (1649), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:34:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:34:10,351 INFO L93 Difference]: Finished difference Result 20433 states and 35302 transitions. [2023-04-01 09:34:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:34:10,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 549.6666666666666) internal successors, (1649), 3 states have internal predecessors, (1649), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1662 [2023-04-01 09:34:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:34:10,418 INFO L225 Difference]: With dead ends: 20433 [2023-04-01 09:34:10,418 INFO L226 Difference]: Without dead ends: 13619 [2023-04-01 09:34:10,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1677 GetRequests, 1671 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 09:34:10,428 INFO L413 NwaCegarLoop]: 3013 mSDtfsCounter, 29 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 5127 mSolverCounterSat, 1871 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3068 SdHoareTripleChecker+Invalid, 6998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1871 IncrementalHoareTripleChecker+Valid, 5127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-04-01 09:34:10,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3068 Invalid, 6998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1871 Valid, 5127 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-04-01 09:34:10,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13619 states. [2023-04-01 09:34:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13619 to 13619. [2023-04-01 09:34:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13619 states, 13399 states have (on average 1.4891409806701992) internal successors, (19953), 13411 states have internal predecessors, (19953), 66 states have call successors, (66), 66 states have call predecessors, (66), 153 states have return successors, (718), 141 states have call predecessors, (718), 65 states have call successors, (718) [2023-04-01 09:34:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13619 states to 13619 states and 20737 transitions. [2023-04-01 09:34:10,622 INFO L78 Accepts]: Start accepts. Automaton has 13619 states and 20737 transitions. Word has length 1662 [2023-04-01 09:34:10,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:34:10,624 INFO L495 AbstractCegarLoop]: Abstraction has 13619 states and 20737 transitions. [2023-04-01 09:34:10,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 549.6666666666666) internal successors, (1649), 3 states have internal predecessors, (1649), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 09:34:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 13619 states and 20737 transitions. [2023-04-01 09:34:10,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1673 [2023-04-01 09:34:10,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:34:10,687 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:34:10,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 09:34:10,897 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 09:34:10,897 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:34:10,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:34:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1655767639, now seen corresponding path program 1 times [2023-04-01 09:34:10,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:34:10,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465167127] [2023-04-01 09:34:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:34:10,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:34:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:34:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:34:12,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:34:12,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465167127] [2023-04-01 09:34:12,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465167127] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:34:12,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:34:12,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:34:12,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988017197] [2023-04-01 09:34:12,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:34:12,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:34:12,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:34:12,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:34:12,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:34:12,952 INFO L87 Difference]: Start difference. First operand 13619 states and 20737 transitions. Second operand has 5 states, 5 states have (on average 331.8) internal successors, (1659), 4 states have internal predecessors, (1659), 3 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)