/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 IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 21:57:13,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 21:57:13,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 21:57:13,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 21:57:13,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 21:57:13,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 21:57:13,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 21:57:13,080 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 21:57:13,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 21:57:13,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 21:57:13,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 21:57:13,085 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 21:57:13,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 21:57:13,089 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 21:57:13,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 21:57:13,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 21:57:13,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 21:57:13,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 21:57:13,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 21:57:13,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 21:57:13,095 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 21:57:13,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 21:57:13,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 21:57:13,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 21:57:13,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 21:57:13,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 21:57:13,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 21:57:13,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 21:57:13,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 21:57:13,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 21:57:13,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 21:57:13,112 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 21:57:13,113 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 21:57:13,113 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 21:57:13,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 21:57:13,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 21:57:13,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 21:57:13,115 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 21:57:13,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 21:57:13,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 21:57:13,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 21:57:13,121 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 [2023-03-31 21:57:13,149 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 21:57:13,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 21:57:13,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 21:57:13,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 21:57:13,151 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 21:57:13,151 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 21:57:13,151 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 21:57:13,151 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 21:57:13,151 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 21:57:13,152 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 21:57:13,152 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 21:57:13,152 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 21:57:13,152 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 21:57:13,152 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 21:57:13,152 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 21:57:13,152 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 21:57:13,153 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 21:57:13,153 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 21:57:13,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 21:57:13,153 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 21:57:13,153 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 21:57:13,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 21:57:13,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 21:57:13,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 21:57:13,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 21:57:13,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 21:57:13,154 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 21:57:13,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 21:57:13,154 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 21:57:13,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 21:57:13,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 21:57:13,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 21:57:13,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:57:13,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 21:57:13,155 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 21:57:13,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 21:57:13,156 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 21:57:13,156 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 21:57:13,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 21:57:13,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 21:57:13,156 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 21:57:13,156 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 21:57:13,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 21:57:13,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 21:57:13,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 21:57:13,404 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 21:57:13,405 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 21:57:13,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label02.c [2023-03-31 21:57:14,570 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 21:57:15,012 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 21:57:15,012 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label02.c [2023-03-31 21:57:15,042 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93fd51b12/57052eb136934b849cbbc3185d44a5b2/FLAGf129680df [2023-03-31 21:57:15,058 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93fd51b12/57052eb136934b849cbbc3185d44a5b2 [2023-03-31 21:57:15,061 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 21:57:15,066 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 21:57:15,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 21:57:15,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 21:57:15,075 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 21:57:15,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:57:15" (1/1) ... [2023-03-31 21:57:15,076 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c06e199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:15, skipping insertion in model container [2023-03-31 21:57:15,077 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 09:57:15" (1/1) ... [2023-03-31 21:57:15,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 21:57:15,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 21:57:15,458 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label02.c[7651,7664] [2023-03-31 21:57:16,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:57:16,184 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 21:57:16,213 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label02.c[7651,7664] [2023-03-31 21:57:16,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 21:57:16,581 INFO L208 MainTranslator]: Completed translation [2023-03-31 21:57:16,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:16 WrapperNode [2023-03-31 21:57:16,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 21:57:16,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 21:57:16,585 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 21:57:16,585 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 21:57:16,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:16" (1/1) ... [2023-03-31 21:57:16,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:16" (1/1) ... [2023-03-31 21:57:16,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:16" (1/1) ... [2023-03-31 21:57:16,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:16" (1/1) ... [2023-03-31 21:57:16,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:16" (1/1) ... [2023-03-31 21:57:16,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:16" (1/1) ... [2023-03-31 21:57:16,768 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:16" (1/1) ... [2023-03-31 21:57:16,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:16" (1/1) ... [2023-03-31 21:57:16,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 21:57:16,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 21:57:16,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 21:57:16,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 21:57:16,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:16" (1/1) ... [2023-03-31 21:57:16,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 21:57:16,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:57:16,851 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) [2023-03-31 21:57:16,859 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 [2023-03-31 21:57:16,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 21:57:16,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 21:57:16,893 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 21:57:16,893 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 21:57:16,893 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 21:57:16,893 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 21:57:16,894 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 21:57:16,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 21:57:16,894 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 21:57:16,894 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 21:57:16,894 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 21:57:16,894 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 21:57:16,894 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 21:57:16,894 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 21:57:16,894 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 21:57:16,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 21:57:16,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 21:57:16,895 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 21:57:16,895 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 21:57:16,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 21:57:16,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 21:57:16,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 21:57:16,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 21:57:16,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 21:57:16,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 21:57:16,957 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 21:57:16,959 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 21:57:20,733 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 21:57:21,433 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 21:57:21,434 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 21:57:21,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:57:21 BoogieIcfgContainer [2023-03-31 21:57:21,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 21:57:21,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 21:57:21,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 21:57:21,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 21:57:21,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 09:57:15" (1/3) ... [2023-03-31 21:57:21,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ef5cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:57:21, skipping insertion in model container [2023-03-31 21:57:21,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 09:57:16" (2/3) ... [2023-03-31 21:57:21,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11ef5cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 09:57:21, skipping insertion in model container [2023-03-31 21:57:21,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 09:57:21" (3/3) ... [2023-03-31 21:57:21,447 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label02.c [2023-03-31 21:57:21,464 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 21:57:21,464 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 21:57:21,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 21:57:21,542 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;@2194d93d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 21:57:21,543 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 21:57:21,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 21:57:21,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 21:57:21,557 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:57:21,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:57:21,558 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:57:21,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:57:21,563 INFO L85 PathProgramCache]: Analyzing trace with hash 636350788, now seen corresponding path program 1 times [2023-03-31 21:57:21,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:57:21,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542403376] [2023-03-31 21:57:21,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:57:21,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:57:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:57:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:57:21,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:57:21,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542403376] [2023-03-31 21:57:21,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542403376] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:57:21,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:57:21,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 21:57:21,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101115050] [2023-03-31 21:57:21,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:57:21,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 21:57:21,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:57:22,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 21:57:22,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 21:57:22,027 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 21:57:25,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:57:25,263 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 21:57:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 21:57:25,265 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 [2023-03-31 21:57:25,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:57:25,284 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 21:57:25,284 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 21:57:25,290 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 [2023-03-31 21:57:25,293 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 725 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:57:25,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 498 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-03-31 21:57:25,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 21:57:25,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-03-31 21:57:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.6511111111111112) internal successors, (2229), 1350 states have internal predecessors, (2229), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-03-31 21:57:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2252 transitions. [2023-03-31 21:57:25,398 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2252 transitions. Word has length 11 [2023-03-31 21:57:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:57:25,398 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2252 transitions. [2023-03-31 21:57:25,398 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) [2023-03-31 21:57:25,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2252 transitions. [2023-03-31 21:57:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 21:57:25,400 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:57:25,400 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] [2023-03-31 21:57:25,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 21:57:25,401 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:57:25,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:57:25,401 INFO L85 PathProgramCache]: Analyzing trace with hash -219228403, now seen corresponding path program 1 times [2023-03-31 21:57:25,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:57:25,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756855755] [2023-03-31 21:57:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:57:25,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:57:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:57:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:57:25,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:57:25,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756855755] [2023-03-31 21:57:25,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756855755] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:57:25,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:57:25,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:57:25,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798058243] [2023-03-31 21:57:25,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:57:25,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:57:25,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:57:25,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:57:25,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:57:25,613 INFO L87 Difference]: Start difference. First operand 1368 states and 2252 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2023-03-31 21:57:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:57:29,908 INFO L93 Difference]: Finished difference Result 4148 states and 6855 transitions. [2023-03-31 21:57:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 21:57:29,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-03-31 21:57:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:57:29,921 INFO L225 Difference]: With dead ends: 4148 [2023-03-31 21:57:29,922 INFO L226 Difference]: Without dead ends: 2785 [2023-03-31 21:57:29,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 21:57:29,933 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2645 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4201 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2645 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-03-31 21:57:29,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2645 Valid, 89 Invalid, 4871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4201 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-03-31 21:57:29,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-03-31 21:57:30,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2756. [2023-03-31 21:57:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2714 states have (on average 1.4896831245394253) internal successors, (4043), 2718 states have internal predecessors, (4043), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-03-31 21:57:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4120 transitions. [2023-03-31 21:57:30,040 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4120 transitions. Word has length 31 [2023-03-31 21:57:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:57:30,040 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 4120 transitions. [2023-03-31 21:57:30,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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) [2023-03-31 21:57:30,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4120 transitions. [2023-03-31 21:57:30,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 21:57:30,043 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:57:30,043 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 21:57:30,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 21:57:30,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:57:30,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:57:30,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1184326422, now seen corresponding path program 1 times [2023-03-31 21:57:30,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:57:30,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357283866] [2023-03-31 21:57:30,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:57:30,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:57:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:57:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 21:57:30,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:57:30,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357283866] [2023-03-31 21:57:30,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357283866] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:57:30,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 21:57:30,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 21:57:30,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047816350] [2023-03-31 21:57:30,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:57:30,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:57:30,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:57:30,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:57:30,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 21:57:30,328 INFO L87 Difference]: Start difference. First operand 2756 states and 4120 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-03-31 21:57:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:57:33,943 INFO L93 Difference]: Finished difference Result 8417 states and 12813 transitions. [2023-03-31 21:57:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:57:33,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 60 [2023-03-31 21:57:33,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:57:33,980 INFO L225 Difference]: With dead ends: 8417 [2023-03-31 21:57:33,980 INFO L226 Difference]: Without dead ends: 5666 [2023-03-31 21:57:34,007 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 [2023-03-31 21:57:34,014 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2402 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-03-31 21:57:34,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2402 Valid, 100 Invalid, 5045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-03-31 21:57:34,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2023-03-31 21:57:34,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 5604. [2023-03-31 21:57:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5486 states have (on average 1.4279985417426175) internal successors, (7834), 5509 states have internal predecessors, (7834), 28 states have call successors, (28), 28 states have call predecessors, (28), 89 states have return successors, (297), 66 states have call predecessors, (297), 27 states have call successors, (297) [2023-03-31 21:57:34,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8159 transitions. [2023-03-31 21:57:34,180 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8159 transitions. Word has length 60 [2023-03-31 21:57:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:57:34,181 INFO L495 AbstractCegarLoop]: Abstraction has 5604 states and 8159 transitions. [2023-03-31 21:57:34,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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) [2023-03-31 21:57:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8159 transitions. [2023-03-31 21:57:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-03-31 21:57:34,189 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:57:34,189 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-03-31 21:57:34,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 21:57:34,190 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:57:34,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:57:34,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1931199073, now seen corresponding path program 1 times [2023-03-31 21:57:34,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:57:34,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654136158] [2023-03-31 21:57:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:57:34,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:57:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:57:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 21:57:34,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:57:34,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654136158] [2023-03-31 21:57:34,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654136158] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:57:34,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562578750] [2023-03-31 21:57:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:57:34,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:57:34,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:57:34,541 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) [2023-03-31 21:57:34,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 21:57:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:57:34,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 21:57:34,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:57:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:57:34,853 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 21:57:34,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562578750] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 21:57:34,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 21:57:34,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 21:57:34,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438264241] [2023-03-31 21:57:34,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 21:57:34,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 21:57:34,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 21:57:34,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 21:57:34,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 21:57:34,857 INFO L87 Difference]: Start difference. First operand 5604 states and 8159 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:57:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 21:57:38,845 INFO L93 Difference]: Finished difference Result 17003 states and 25456 transitions. [2023-03-31 21:57:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 21:57:38,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 74 [2023-03-31 21:57:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 21:57:38,891 INFO L225 Difference]: With dead ends: 17003 [2023-03-31 21:57:38,891 INFO L226 Difference]: Without dead ends: 11404 [2023-03-31 21:57:38,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-31 21:57:38,908 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2206 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 4593 mSolverCounterSat, 981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2206 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 5574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 981 IncrementalHoareTripleChecker+Valid, 4593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-03-31 21:57:38,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2206 Valid, 92 Invalid, 5574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [981 Valid, 4593 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-03-31 21:57:38,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2023-03-31 21:57:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 11316. [2023-03-31 21:57:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11316 states, 11031 states have (on average 1.3050494062188378) internal successors, (14396), 11099 states have internal predecessors, (14396), 52 states have call successors, (52), 52 states have call predecessors, (52), 232 states have return successors, (1084), 164 states have call predecessors, (1084), 51 states have call successors, (1084) [2023-03-31 21:57:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11316 states to 11316 states and 15532 transitions. [2023-03-31 21:57:39,174 INFO L78 Accepts]: Start accepts. Automaton has 11316 states and 15532 transitions. Word has length 74 [2023-03-31 21:57:39,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 21:57:39,176 INFO L495 AbstractCegarLoop]: Abstraction has 11316 states and 15532 transitions. [2023-03-31 21:57:39,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 21:57:39,176 INFO L276 IsEmpty]: Start isEmpty. Operand 11316 states and 15532 transitions. [2023-03-31 21:57:39,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-03-31 21:57:39,179 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 21:57:39,179 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 21:57:39,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 21:57:39,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:57:39,387 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 21:57:39,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 21:57:39,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1410174958, now seen corresponding path program 1 times [2023-03-31 21:57:39,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 21:57:39,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097988052] [2023-03-31 21:57:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:57:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 21:57:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:57:39,585 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:57:39,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 21:57:39,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097988052] [2023-03-31 21:57:39,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097988052] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 21:57:39,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307525589] [2023-03-31 21:57:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 21:57:39,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 21:57:39,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 21:57:39,593 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 21:57:39,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 21:57:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 21:57:39,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 21:57:39,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 21:57:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 21:57:39,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 21:57:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 21:57:40,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307525589] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 21:57:40,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1837670634] [2023-03-31 21:57:40,048 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-03-31 21:57:40,048 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 21:57:40,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 21:57:40,055 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 21:57:40,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 21:57:40,193 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-03-31 21:57:40,440 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 56 [2023-03-31 21:57:41,374 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 46 for LOIs [2023-03-31 21:57:41,634 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 56