/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:33:10,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:33:10,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:33:10,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:33:10,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:33:10,064 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:33:10,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:33:10,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:33:10,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:33:10,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:33:10,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:33:10,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:33:10,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:33:10,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:33:10,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:33:10,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:33:10,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:33:10,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:33:10,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:33:10,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:33:10,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:33:10,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:33:10,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:33:10,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:33:10,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:33:10,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:33:10,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:33:10,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:33:10,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:33:10,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:33:10,104 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:33:10,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:33:10,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:33:10,106 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:33:10,107 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:33:10,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:33:10,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:33:10,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:33:10,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:33:10,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:33:10,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:33:10,111 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 10:33:10,140 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:33:10,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:33:10,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:33:10,141 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:33:10,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:33:10,142 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:33:10,142 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:33:10,142 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:33:10,142 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:33:10,142 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:33:10,143 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:33:10,143 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:33:10,143 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:33:10,144 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:33:10,144 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:33:10,144 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:33:10,144 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:33:10,144 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:33:10,145 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:33:10,145 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:33:10,145 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:33:10,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:33:10,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:33:10,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:33:10,146 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:33:10,146 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:33:10,146 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:33:10,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:33:10,146 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:33:10,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:33:10,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:33:10,147 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:33:10,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:33:10,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:33:10,147 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:33:10,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:33:10,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:33:10,148 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:33:10,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:33:10,148 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:33:10,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:33:10,148 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:33:10,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:33:10,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:33:10,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:33:10,404 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:33:10,404 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:33:10,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label04.c [2023-04-01 10:33:11,535 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:33:12,102 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:33:12,103 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label04.c [2023-04-01 10:33:12,149 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f365ab18/ac0c8478adb5497d9f51f2942740eab4/FLAG80513294d [2023-04-01 10:33:12,173 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f365ab18/ac0c8478adb5497d9f51f2942740eab4 [2023-04-01 10:33:12,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:33:12,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:33:12,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:33:12,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:33:12,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:33:12,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:33:12" (1/1) ... [2023-04-01 10:33:12,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62664fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:12, skipping insertion in model container [2023-04-01 10:33:12,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:33:12" (1/1) ... [2023-04-01 10:33:12,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:33:12,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:33:12,669 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label04.c[8051,8064] [2023-04-01 10:33:13,770 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:33:13,781 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:33:13,804 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label04.c[8051,8064] [2023-04-01 10:33:14,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:33:14,545 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:33:14,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:14 WrapperNode [2023-04-01 10:33:14,546 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:33:14,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:33:14,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:33:14,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:33:14,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:14" (1/1) ... [2023-04-01 10:33:14,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:14" (1/1) ... [2023-04-01 10:33:14,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:14" (1/1) ... [2023-04-01 10:33:14,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:14" (1/1) ... [2023-04-01 10:33:14,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:14" (1/1) ... [2023-04-01 10:33:14,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:14" (1/1) ... [2023-04-01 10:33:14,918 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:14" (1/1) ... [2023-04-01 10:33:14,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:14" (1/1) ... [2023-04-01 10:33:15,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:33:15,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:33:15,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:33:15,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:33:15,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:14" (1/1) ... [2023-04-01 10:33:15,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:33:15,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:33:15,046 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 10:33:15,070 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 10:33:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:33:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:33:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:33:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:33:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:33:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:33:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 10:33:15,085 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-04-01 10:33:15,086 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-04-01 10:33:15,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:33:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:33:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:33:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:33:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 10:33:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-04-01 10:33:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-04-01 10:33:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:33:15,086 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:33:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:33:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:33:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:33:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:33:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:33:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:33:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:33:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:33:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:33:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:33:15,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:33:15,209 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:33:15,211 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:33:22,698 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:33:37,996 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:33:37,997 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:33:38,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:33:38 BoogieIcfgContainer [2023-04-01 10:33:38,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:33:38,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:33:38,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:33:38,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:33:38,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:33:12" (1/3) ... [2023-04-01 10:33:38,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a024d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:33:38, skipping insertion in model container [2023-04-01 10:33:38,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:33:14" (2/3) ... [2023-04-01 10:33:38,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a024d94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:33:38, skipping insertion in model container [2023-04-01 10:33:38,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:33:38" (3/3) ... [2023-04-01 10:33:38,009 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label04.c [2023-04-01 10:33:38,026 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:33:38,026 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:33:38,111 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:33:38,118 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;@69c1d511, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:33:38,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:33:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 10:33:38,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:33:38,135 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:33:38,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:33:38,138 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:33:38,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:33:38,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1235906275, now seen corresponding path program 1 times [2023-04-01 10:33:38,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:33:38,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401609613] [2023-04-01 10:33:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:33:38,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:33:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:33:38,575 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 10:33:38,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:33:38,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401609613] [2023-04-01 10:33:38,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401609613] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:33:38,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:33:38,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:33:38,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180095403] [2023-04-01 10:33:38,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:33:38,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:33:38,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:33:38,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:33:38,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:33:38,629 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:33:44,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:33:44,369 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-04-01 10:33:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:33:44,373 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 10:33:44,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:33:44,398 INFO L225 Difference]: With dead ends: 3418 [2023-04-01 10:33:44,398 INFO L226 Difference]: Without dead ends: 2271 [2023-04-01 10:33:44,406 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 10:33:44,409 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 1191 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3809 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 4723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 3809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:33:44,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 259 Invalid, 4723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 3809 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-04-01 10:33:44,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-04-01 10:33:44,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2023-04-01 10:33:44,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 2243 states have (on average 1.8872046366473474) internal successors, (4233), 2243 states have internal predecessors, (4233), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-04-01 10:33:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 4268 transitions. [2023-04-01 10:33:44,549 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 4268 transitions. Word has length 11 [2023-04-01 10:33:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:33:44,550 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 4268 transitions. [2023-04-01 10:33:44,550 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 10:33:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 4268 transitions. [2023-04-01 10:33:44,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 10:33:44,553 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:33:44,553 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:33:44,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:33:44,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:33:44,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:33:44,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1654543147, now seen corresponding path program 1 times [2023-04-01 10:33:44,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:33:44,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425506005] [2023-04-01 10:33:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:33:44,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:33:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:33:44,821 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 10:33:44,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:33:44,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425506005] [2023-04-01 10:33:44,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425506005] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:33:44,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:33:44,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:33:44,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574588767] [2023-04-01 10:33:44,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:33:44,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:33:44,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:33:44,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:33:44,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:33:44,826 INFO L87 Difference]: Start difference. First operand 2269 states and 4268 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:33:52,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:33:52,351 INFO L93 Difference]: Finished difference Result 6869 states and 12971 transitions. [2023-04-01 10:33:52,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:33:52,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-04-01 10:33:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:33:52,386 INFO L225 Difference]: With dead ends: 6869 [2023-04-01 10:33:52,387 INFO L226 Difference]: Without dead ends: 4605 [2023-04-01 10:33:52,392 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 10:33:52,394 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 3856 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 6432 mSolverCounterSat, 2061 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3856 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 8493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2061 IncrementalHoareTripleChecker+Valid, 6432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:33:52,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3856 Valid, 148 Invalid, 8493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2061 Valid, 6432 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-04-01 10:33:52,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2023-04-01 10:33:52,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 4572. [2023-04-01 10:33:52,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4507 states have (on average 1.8011981362325271) internal successors, (8118), 4511 states have internal predecessors, (8118), 23 states have call successors, (23), 23 states have call predecessors, (23), 41 states have return successors, (120), 37 states have call predecessors, (120), 22 states have call successors, (120) [2023-04-01 10:33:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 8261 transitions. [2023-04-01 10:33:52,537 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 8261 transitions. Word has length 25 [2023-04-01 10:33:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:33:52,537 INFO L495 AbstractCegarLoop]: Abstraction has 4572 states and 8261 transitions. [2023-04-01 10:33:52,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:33:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 8261 transitions. [2023-04-01 10:33:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 10:33:52,538 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:33:52,538 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] [2023-04-01 10:33:52,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:33:52,538 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:33:52,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:33:52,539 INFO L85 PathProgramCache]: Analyzing trace with hash -751365555, now seen corresponding path program 1 times [2023-04-01 10:33:52,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:33:52,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250844468] [2023-04-01 10:33:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:33:52,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:33:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:33:52,714 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 10:33:52,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:33:52,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250844468] [2023-04-01 10:33:52,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250844468] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:33:52,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:33:52,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:33:52,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325566] [2023-04-01 10:33:52,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:33:52,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:33:52,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:33:52,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:33:52,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:33:52,719 INFO L87 Difference]: Start difference. First operand 4572 states and 8261 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 10:34:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:34:00,298 INFO L93 Difference]: Finished difference Result 13013 states and 23486 transitions. [2023-04-01 10:34:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:34:00,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 29 [2023-04-01 10:34:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:34:00,335 INFO L225 Difference]: With dead ends: 13013 [2023-04-01 10:34:00,336 INFO L226 Difference]: Without dead ends: 8446 [2023-04-01 10:34:00,346 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 10:34:00,347 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3801 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 6861 mSolverCounterSat, 1739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3801 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 8600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1739 IncrementalHoareTripleChecker+Valid, 6861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:34:00,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3801 Valid, 184 Invalid, 8600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1739 Valid, 6861 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-04-01 10:34:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8446 states. [2023-04-01 10:34:00,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8446 to 8256. [2023-04-01 10:34:00,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8256 states, 8050 states have (on average 1.5526708074534161) internal successors, (12499), 8078 states have internal predecessors, (12499), 38 states have call successors, (38), 38 states have call predecessors, (38), 167 states have return successors, (593), 139 states have call predecessors, (593), 37 states have call successors, (593) [2023-04-01 10:34:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8256 states to 8256 states and 13130 transitions. [2023-04-01 10:34:00,601 INFO L78 Accepts]: Start accepts. Automaton has 8256 states and 13130 transitions. Word has length 29 [2023-04-01 10:34:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:34:00,602 INFO L495 AbstractCegarLoop]: Abstraction has 8256 states and 13130 transitions. [2023-04-01 10:34:00,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 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 10:34:00,602 INFO L276 IsEmpty]: Start isEmpty. Operand 8256 states and 13130 transitions. [2023-04-01 10:34:00,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 10:34:00,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:34:00,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:34:00,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:34:00,604 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:34:00,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:34:00,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1566967867, now seen corresponding path program 1 times [2023-04-01 10:34:00,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:34:00,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879139705] [2023-04-01 10:34:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:34:00,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:34:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:34:00,745 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 10:34:00,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:34:00,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879139705] [2023-04-01 10:34:00,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879139705] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:34:00,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:34:00,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:34:00,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64914950] [2023-04-01 10:34:00,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:34:00,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:34:00,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:34:00,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:34:00,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:34:00,748 INFO L87 Difference]: Start difference. First operand 8256 states and 13130 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2)