/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem18_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 20:26:13,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 20:26:13,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 20:26:13,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 20:26:13,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 20:26:13,994 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 20:26:13,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 20:26:14,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 20:26:14,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 20:26:14,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 20:26:14,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 20:26:14,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 20:26:14,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 20:26:14,016 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 20:26:14,017 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 20:26:14,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 20:26:14,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 20:26:14,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 20:26:14,020 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 20:26:14,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 20:26:14,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 20:26:14,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 20:26:14,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 20:26:14,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 20:26:14,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 20:26:14,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 20:26:14,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 20:26:14,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 20:26:14,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 20:26:14,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 20:26:14,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 20:26:14,038 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 20:26:14,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 20:26:14,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 20:26:14,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 20:26:14,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 20:26:14,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 20:26:14,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 20:26:14,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 20:26:14,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 20:26:14,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 20:26:14,045 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 [2023-04-02 20:26:14,078 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 20:26:14,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 20:26:14,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 20:26:14,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 20:26:14,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 20:26:14,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 20:26:14,080 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 20:26:14,081 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 20:26:14,081 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 20:26:14,081 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 20:26:14,082 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 20:26:14,082 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 20:26:14,082 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 20:26:14,082 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 20:26:14,082 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 20:26:14,082 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 20:26:14,082 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 20:26:14,083 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 20:26:14,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 20:26:14,083 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 20:26:14,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 20:26:14,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 20:26:14,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 20:26:14,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 20:26:14,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 20:26:14,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 20:26:14,085 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 20:26:14,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 20:26:14,085 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 20:26:14,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 20:26:14,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 20:26:14,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 20:26:14,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:26:14,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 20:26:14,086 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 20:26:14,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 20:26:14,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 20:26:14,086 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 20:26:14,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 20:26:14,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 20:26:14,087 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 20:26:14,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 20:26:14,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 20:26:14,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 20:26:14,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 20:26:14,343 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 20:26:14,343 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 20:26:14,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label10.c [2023-04-02 20:26:15,491 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 20:26:15,926 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 20:26:15,926 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label10.c [2023-04-02 20:26:15,951 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c6881cbf/918d4edcf9044b978b87a14ff2690420/FLAG7891b49ed [2023-04-02 20:26:15,966 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c6881cbf/918d4edcf9044b978b87a14ff2690420 [2023-04-02 20:26:15,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 20:26:15,971 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 20:26:15,972 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 20:26:15,972 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 20:26:15,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 20:26:15,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:26:15" (1/1) ... [2023-04-02 20:26:15,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de741a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:26:15, skipping insertion in model container [2023-04-02 20:26:15,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 08:26:15" (1/1) ... [2023-04-02 20:26:15,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 20:26:16,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 20:26:16,316 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label10.c[2213,2226] [2023-04-02 20:26:16,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:26:16,984 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 20:26:17,005 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label10.c[2213,2226] [2023-04-02 20:26:17,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 20:26:17,283 INFO L208 MainTranslator]: Completed translation [2023-04-02 20:26:17,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:26:17 WrapperNode [2023-04-02 20:26:17,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 20:26:17,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 20:26:17,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 20:26:17,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 20:26:17,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:26:17" (1/1) ... [2023-04-02 20:26:17,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:26:17" (1/1) ... [2023-04-02 20:26:17,343 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:26:17" (1/1) ... [2023-04-02 20:26:17,344 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:26:17" (1/1) ... [2023-04-02 20:26:17,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:26:17" (1/1) ... [2023-04-02 20:26:17,453 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:26:17" (1/1) ... [2023-04-02 20:26:17,485 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:26:17" (1/1) ... [2023-04-02 20:26:17,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:26:17" (1/1) ... [2023-04-02 20:26:17,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 20:26:17,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 20:26:17,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 20:26:17,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 20:26:17,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:26:17" (1/1) ... [2023-04-02 20:26:17,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 20:26:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:26:17,562 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) [2023-04-02 20:26:17,585 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 [2023-04-02 20:26:17,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 20:26:17,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 20:26:17,612 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 20:26:17,612 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-02 20:26:17,612 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-02 20:26:17,612 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-02 20:26:17,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 20:26:17,613 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-02 20:26:17,613 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-02 20:26:17,613 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-02 20:26:17,613 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 20:26:17,613 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 20:26:17,613 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 20:26:17,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 20:26:17,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 20:26:17,613 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 20:26:17,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 20:26:17,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 20:26:17,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 20:26:17,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 20:26:17,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 20:26:17,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 20:26:17,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 20:26:17,710 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 20:26:17,711 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 20:26:20,154 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 20:26:26,678 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 20:26:26,679 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 20:26:26,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:26:26 BoogieIcfgContainer [2023-04-02 20:26:26,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 20:26:26,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 20:26:26,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 20:26:26,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 20:26:26,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 08:26:15" (1/3) ... [2023-04-02 20:26:26,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e98b361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:26:26, skipping insertion in model container [2023-04-02 20:26:26,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 08:26:17" (2/3) ... [2023-04-02 20:26:26,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e98b361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 08:26:26, skipping insertion in model container [2023-04-02 20:26:26,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 08:26:26" (3/3) ... [2023-04-02 20:26:26,690 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label10.c [2023-04-02 20:26:26,706 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 20:26:26,707 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 20:26:26,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 20:26:26,761 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;@122af747, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 20:26:26,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 20:26:26,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 20:26:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 20:26:26,773 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:26:26,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:26:26,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:26:26,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:26:26,779 INFO L85 PathProgramCache]: Analyzing trace with hash 510739684, now seen corresponding path program 1 times [2023-04-02 20:26:26,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:26:26,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741706527] [2023-04-02 20:26:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:26:26,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:26:26,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:26:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:26:27,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:26:27,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741706527] [2023-04-02 20:26:27,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741706527] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:26:27,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:26:27,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:26:27,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975371430] [2023-04-02 20:26:27,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:26:27,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:26:27,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:26:27,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:26:27,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:26:27,189 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 20:26:29,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:26:29,410 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-02 20:26:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:26:29,414 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 [2023-04-02 20:26:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:26:29,430 INFO L225 Difference]: With dead ends: 1393 [2023-04-02 20:26:29,430 INFO L226 Difference]: Without dead ends: 921 [2023-04-02 20:26:29,436 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 [2023-04-02 20:26:29,439 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 515 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-02 20:26:29,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 339 Invalid, 1807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-02 20:26:29,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-02 20:26:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-02 20:26:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6519337016574585) internal successors, (1495), 905 states have internal predecessors, (1495), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-02 20:26:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1512 transitions. [2023-04-02 20:26:29,507 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1512 transitions. Word has length 11 [2023-04-02 20:26:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:26:29,507 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1512 transitions. [2023-04-02 20:26:29,507 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) [2023-04-02 20:26:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1512 transitions. [2023-04-02 20:26:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-02 20:26:29,508 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:26:29,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:26:29,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 20:26:29,509 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:26:29,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:26:29,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1363833710, now seen corresponding path program 1 times [2023-04-02 20:26:29,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:26:29,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90628274] [2023-04-02 20:26:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:26:29,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:26:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:26:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:26:29,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:26:29,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90628274] [2023-04-02 20:26:29,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90628274] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:26:29,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:26:29,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:26:29,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493720133] [2023-04-02 20:26:29,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:26:29,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:26:29,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:26:29,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:26:29,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:26:29,626 INFO L87 Difference]: Start difference. First operand 919 states and 1512 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-04-02 20:26:32,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:26:32,274 INFO L93 Difference]: Finished difference Result 2781 states and 4622 transitions. [2023-04-02 20:26:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:26:32,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 21 [2023-04-02 20:26:32,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:26:32,286 INFO L225 Difference]: With dead ends: 2781 [2023-04-02 20:26:32,286 INFO L226 Difference]: Without dead ends: 1867 [2023-04-02 20:26:32,292 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 [2023-04-02 20:26:32,294 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1548 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3056 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1548 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 3757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 3056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-02 20:26:32,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1548 Valid, 83 Invalid, 3757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 3056 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-02 20:26:32,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2023-04-02 20:26:32,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1822. [2023-04-02 20:26:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1792 states have (on average 1.5412946428571428) internal successors, (2762), 1796 states have internal predecessors, (2762), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (50), 14 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-02 20:26:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2823 transitions. [2023-04-02 20:26:32,377 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2823 transitions. Word has length 21 [2023-04-02 20:26:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:26:32,377 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2823 transitions. [2023-04-02 20:26:32,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2023-04-02 20:26:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2823 transitions. [2023-04-02 20:26:32,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-02 20:26:32,378 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:26:32,378 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] [2023-04-02 20:26:32,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 20:26:32,379 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:26:32,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:26:32,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1686859338, now seen corresponding path program 1 times [2023-04-02 20:26:32,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:26:32,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850233101] [2023-04-02 20:26:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:26:32,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:26:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:26:32,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:26:32,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:26:32,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850233101] [2023-04-02 20:26:32,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850233101] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:26:32,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:26:32,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 20:26:32,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790753977] [2023-04-02 20:26:32,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:26:32,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 20:26:32,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:26:32,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 20:26:32,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 20:26:32,519 INFO L87 Difference]: Start difference. First operand 1822 states and 2823 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) [2023-04-02 20:26:34,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:26:34,961 INFO L93 Difference]: Finished difference Result 5051 states and 8054 transitions. [2023-04-02 20:26:34,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 20:26:34,962 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 [2023-04-02 20:26:34,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:26:34,979 INFO L225 Difference]: With dead ends: 5051 [2023-04-02 20:26:34,979 INFO L226 Difference]: Without dead ends: 3234 [2023-04-02 20:26:34,986 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 [2023-04-02 20:26:34,990 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1718 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-02 20:26:34,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 66 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-02 20:26:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2023-04-02 20:26:35,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 3207. [2023-04-02 20:26:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3207 states, 3152 states have (on average 1.3981598984771573) internal successors, (4407), 3163 states have internal predecessors, (4407), 17 states have call successors, (17), 17 states have call predecessors, (17), 37 states have return successors, (145), 26 states have call predecessors, (145), 16 states have call successors, (145) [2023-04-02 20:26:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3207 states to 3207 states and 4569 transitions. [2023-04-02 20:26:35,074 INFO L78 Accepts]: Start accepts. Automaton has 3207 states and 4569 transitions. Word has length 25 [2023-04-02 20:26:35,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:26:35,074 INFO L495 AbstractCegarLoop]: Abstraction has 3207 states and 4569 transitions. [2023-04-02 20:26:35,075 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) [2023-04-02 20:26:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3207 states and 4569 transitions. [2023-04-02 20:26:35,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-02 20:26:35,076 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:26:35,076 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] [2023-04-02 20:26:35,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 20:26:35,076 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:26:35,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:26:35,077 INFO L85 PathProgramCache]: Analyzing trace with hash -42858099, now seen corresponding path program 1 times [2023-04-02 20:26:35,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:26:35,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380202183] [2023-04-02 20:26:35,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:26:35,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:26:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:26:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:26:35,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:26:35,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380202183] [2023-04-02 20:26:35,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380202183] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 20:26:35,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 20:26:35,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 20:26:35,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121039399] [2023-04-02 20:26:35,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 20:26:35,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 20:26:35,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 20:26:35,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 20:26:35,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:26:35,210 INFO L87 Difference]: Start difference. First operand 3207 states and 4569 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 20:26:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 20:26:37,077 INFO L93 Difference]: Finished difference Result 9134 states and 12952 transitions. [2023-04-02 20:26:37,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 20:26:37,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-04-02 20:26:37,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 20:26:37,112 INFO L225 Difference]: With dead ends: 9134 [2023-04-02 20:26:37,112 INFO L226 Difference]: Without dead ends: 5932 [2023-04-02 20:26:37,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 20:26:37,119 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 450 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-02 20:26:37,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 838 Invalid, 1869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-02 20:26:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5932 states. [2023-04-02 20:26:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5932 to 5792. [2023-04-02 20:26:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5701 states have (on average 1.278196807577618) internal successors, (7287), 5722 states have internal predecessors, (7287), 29 states have call successors, (29), 29 states have call predecessors, (29), 61 states have return successors, (355), 40 states have call predecessors, (355), 28 states have call successors, (355) [2023-04-02 20:26:37,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 7671 transitions. [2023-04-02 20:26:37,259 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 7671 transitions. Word has length 58 [2023-04-02 20:26:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 20:26:37,259 INFO L495 AbstractCegarLoop]: Abstraction has 5792 states and 7671 transitions. [2023-04-02 20:26:37,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-02 20:26:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 7671 transitions. [2023-04-02 20:26:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-04-02 20:26:37,267 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 20:26:37,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 20:26:37,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 20:26:37,268 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 20:26:37,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 20:26:37,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1724195028, now seen corresponding path program 1 times [2023-04-02 20:26:37,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 20:26:37,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449584512] [2023-04-02 20:26:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:26:37,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 20:26:37,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:26:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:26:37,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 20:26:37,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449584512] [2023-04-02 20:26:37,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449584512] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 20:26:37,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327539342] [2023-04-02 20:26:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 20:26:37,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 20:26:37,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 20:26:37,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 20:26:37,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 20:26:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 20:26:37,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-02 20:26:37,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 20:26:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:26:37,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 20:26:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 20:26:37,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327539342] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 20:26:37,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [614020413] [2023-04-02 20:26:37,823 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-04-02 20:26:37,823 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 20:26:37,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 20:26:37,829 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 20:26:37,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 20:26:37,989 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-02 20:26:38,116 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2023-04-02 20:26:38,243 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 10052 conjuctions. This might take some time... [2023-04-02 20:26:38,798 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 604 conjuctions. [2023-04-02 20:27:09,086 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 49