/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_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:27:22,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:27:22,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:27:22,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:27:22,574 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:27:22,577 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:27:22,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:27:22,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:27:22,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:27:22,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:27:22,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:27:22,592 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:27:22,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:27:22,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:27:22,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:27:22,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:27:22,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:27:22,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:27:22,606 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:27:22,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:27:22,612 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:27:22,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:27:22,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:27:22,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:27:22,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:27:22,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:27:22,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:27:22,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:27:22,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:27:22,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:27:22,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:27:22,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:27:22,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:27:22,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:27:22,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:27:22,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:27:22,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:27:22,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:27:22,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:27:22,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:27:22,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:27:22,633 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:27:22,662 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:27:22,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:27:22,663 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:27:22,663 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:27:22,664 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:27:22,664 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:27:22,664 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:27:22,664 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:27:22,665 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:27:22,665 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:27:22,665 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:27:22,666 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:27:22,666 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:27:22,666 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:27:22,666 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:27:22,666 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:27:22,666 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:27:22,667 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:27:22,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:27:22,667 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:27:22,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:27:22,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:27:22,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:27:22,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:27:22,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:27:22,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:27:22,668 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:27:22,668 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:27:22,669 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:27:22,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:27:22,669 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:27:22,669 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:27:22,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:27:22,670 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:27:22,670 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:27:22,670 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:27:22,670 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:27:22,670 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:27:22,670 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:27:22,671 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:27:22,671 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:27:22,671 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:27:22,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:27:22,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:27:22,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:27:22,936 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:27:22,937 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:27:22,938 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label31.c [2023-04-01 04:27:24,213 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:27:24,606 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:27:24,606 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label31.c [2023-04-01 04:27:24,632 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eefe23c1f/79587a5df73a45aa849956f4733ea176/FLAGbaf066fef [2023-04-01 04:27:24,648 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eefe23c1f/79587a5df73a45aa849956f4733ea176 [2023-04-01 04:27:24,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:27:24,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:27:24,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:27:24,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:27:24,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:27:24,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:27:24" (1/1) ... [2023-04-01 04:27:24,660 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee7a8f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:24, skipping insertion in model container [2023-04-01 04:27:24,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:27:24" (1/1) ... [2023-04-01 04:27:24,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:27:24,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:27:24,992 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_label31.c[1896,1909] [2023-04-01 04:27:25,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:27:25,581 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:27:25,605 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_label31.c[1896,1909] [2023-04-01 04:27:25,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:27:25,942 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:27:25,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:25 WrapperNode [2023-04-01 04:27:25,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:27:25,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:27:25,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:27:25,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:27:25,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:25" (1/1) ... [2023-04-01 04:27:25,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:25" (1/1) ... [2023-04-01 04:27:26,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:25" (1/1) ... [2023-04-01 04:27:26,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:25" (1/1) ... [2023-04-01 04:27:26,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:25" (1/1) ... [2023-04-01 04:27:26,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:25" (1/1) ... [2023-04-01 04:27:26,121 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:25" (1/1) ... [2023-04-01 04:27:26,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:25" (1/1) ... [2023-04-01 04:27:26,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:27:26,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:27:26,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:27:26,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:27:26,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:25" (1/1) ... [2023-04-01 04:27:26,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:27:26,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:27:26,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:27:26,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:27:26,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:27:26,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:27:26,225 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:27:26,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:27:26,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:27:26,225 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:27:26,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:27:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:27:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:27:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:27:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:27:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:27:26,225 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:27:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:27:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:27:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:27:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:27:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:27:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:27:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:27:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:27:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:27:26,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:27:26,326 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:27:26,328 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:27:29,318 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:27:36,842 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:27:36,843 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:27:36,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:27:36 BoogieIcfgContainer [2023-04-01 04:27:36,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:27:36,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:27:36,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:27:36,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:27:36,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:27:24" (1/3) ... [2023-04-01 04:27:36,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2e4c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:27:36, skipping insertion in model container [2023-04-01 04:27:36,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:27:25" (2/3) ... [2023-04-01 04:27:36,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2e4c58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:27:36, skipping insertion in model container [2023-04-01 04:27:36,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:27:36" (3/3) ... [2023-04-01 04:27:36,852 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label31.c [2023-04-01 04:27:36,868 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:27:36,868 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:27:36,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:27:36,946 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;@1941fa9b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:27:36,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:27:36,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:27:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:27:36,961 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:36,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:27:36,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:36,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:36,967 INFO L85 PathProgramCache]: Analyzing trace with hash 314225411, now seen corresponding path program 1 times [2023-04-01 04:27:36,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:36,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914265920] [2023-04-01 04:27:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:36,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:37,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:37,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914265920] [2023-04-01 04:27:37,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914265920] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:37,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:27:37,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:27:37,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245053848] [2023-04-01 04:27:37,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:37,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:27:37,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:37,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:27:37,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:27:37,318 INFO L87 Difference]: Start difference. First operand has 469 states, 457 states have (on average 1.9715536105032823) internal successors, (901), 458 states have internal predecessors, (901), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:27:39,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:39,765 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 04:27:39,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:27:39,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:27:39,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:39,793 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 04:27:39,793 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 04:27:39,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:27:39,803 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 480 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:39,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 68 Invalid, 2114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 04:27:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 04:27:39,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 899. [2023-04-01 04:27:39,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 885 states have (on average 1.9457627118644067) internal successors, (1722), 885 states have internal predecessors, (1722), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-04-01 04:27:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1739 transitions. [2023-04-01 04:27:39,905 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1739 transitions. Word has length 11 [2023-04-01 04:27:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:39,905 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 1739 transitions. [2023-04-01 04:27:39,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:27:39,906 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1739 transitions. [2023-04-01 04:27:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:27:39,907 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:39,907 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:27:39,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:27:39,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:39,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:39,908 INFO L85 PathProgramCache]: Analyzing trace with hash 987770177, now seen corresponding path program 1 times [2023-04-01 04:27:39,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:39,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908850701] [2023-04-01 04:27:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:39,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:40,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:40,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908850701] [2023-04-01 04:27:40,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908850701] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:40,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:27:40,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:27:40,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343502424] [2023-04-01 04:27:40,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:40,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:27:40,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:40,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:27:40,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:27:40,158 INFO L87 Difference]: Start difference. First operand 899 states and 1739 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:27:43,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:43,199 INFO L93 Difference]: Finished difference Result 2721 states and 5303 transitions. [2023-04-01 04:27:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:27:43,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-04-01 04:27:43,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:43,210 INFO L225 Difference]: With dead ends: 2721 [2023-04-01 04:27:43,211 INFO L226 Difference]: Without dead ends: 1827 [2023-04-01 04:27:43,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:27:43,214 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1716 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1716 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:43,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1716 Valid, 71 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:27:43,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2023-04-01 04:27:43,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1807. [2023-04-01 04:27:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1777 states have (on average 1.727068092290377) internal successors, (3069), 1781 states have internal predecessors, (3069), 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) [2023-04-01 04:27:43,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 3130 transitions. [2023-04-01 04:27:43,291 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 3130 transitions. Word has length 25 [2023-04-01 04:27:43,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:43,291 INFO L495 AbstractCegarLoop]: Abstraction has 1807 states and 3130 transitions. [2023-04-01 04:27:43,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:27:43,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 3130 transitions. [2023-04-01 04:27:43,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 04:27:43,293 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:43,293 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] [2023-04-01 04:27:43,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:27:43,293 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:43,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:43,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1254595822, now seen corresponding path program 1 times [2023-04-01 04:27:43,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:43,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663010733] [2023-04-01 04:27:43,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:43,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:43,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:43,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663010733] [2023-04-01 04:27:43,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663010733] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:43,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:27:43,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:27:43,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539669010] [2023-04-01 04:27:43,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:43,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:27:43,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:43,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:27:43,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:27:43,477 INFO L87 Difference]: Start difference. First operand 1807 states and 3130 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:27:46,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:46,337 INFO L93 Difference]: Finished difference Result 5507 states and 9693 transitions. [2023-04-01 04:27:46,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:27:46,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 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 28 [2023-04-01 04:27:46,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:46,357 INFO L225 Difference]: With dead ends: 5507 [2023-04-01 04:27:46,358 INFO L226 Difference]: Without dead ends: 3705 [2023-04-01 04:27:46,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:27:46,365 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1549 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2646 mSolverCounterSat, 763 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 3409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 763 IncrementalHoareTripleChecker+Valid, 2646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:46,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1549 Valid, 87 Invalid, 3409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [763 Valid, 2646 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-01 04:27:46,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2023-04-01 04:27:46,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 3653. [2023-04-01 04:27:46,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3577 states have (on average 1.4788929270338271) internal successors, (5290), 3599 states have internal predecessors, (5290), 19 states have call successors, (19), 19 states have call predecessors, (19), 56 states have return successors, (228), 34 states have call predecessors, (228), 18 states have call successors, (228) [2023-04-01 04:27:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 5537 transitions. [2023-04-01 04:27:46,566 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 5537 transitions. Word has length 28 [2023-04-01 04:27:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:46,566 INFO L495 AbstractCegarLoop]: Abstraction has 3653 states and 5537 transitions. [2023-04-01 04:27:46,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:27:46,567 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 5537 transitions. [2023-04-01 04:27:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 04:27:46,569 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:46,569 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:27:46,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:27:46,569 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:46,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:46,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1093403596, now seen corresponding path program 1 times [2023-04-01 04:27:46,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:46,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865594308] [2023-04-01 04:27:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:46,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:27:46,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:46,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865594308] [2023-04-01 04:27:46,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865594308] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:27:46,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325746118] [2023-04-01 04:27:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:46,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:27:46,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:27:46,754 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:27:46,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:27:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:46,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:27:46,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:27:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:27:46,966 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:27:46,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325746118] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:27:46,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:27:46,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:27:46,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934890084] [2023-04-01 04:27:46,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:27:46,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:27:46,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:27:46,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:27:46,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:27:46,968 INFO L87 Difference]: Start difference. First operand 3653 states and 5537 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:27:49,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:27:49,326 INFO L93 Difference]: Finished difference Result 9191 states and 13934 transitions. [2023-04-01 04:27:49,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:27:49,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 38 [2023-04-01 04:27:49,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:27:49,359 INFO L225 Difference]: With dead ends: 9191 [2023-04-01 04:27:49,360 INFO L226 Difference]: Without dead ends: 5543 [2023-04-01 04:27:49,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:27:49,377 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1602 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 2358 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1602 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 2358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:27:49,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1602 Valid, 59 Invalid, 3180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 2358 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-04-01 04:27:49,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5543 states. [2023-04-01 04:27:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5543 to 5485. [2023-04-01 04:27:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5485 states, 5359 states have (on average 1.3558499720097033) internal successors, (7266), 5402 states have internal predecessors, (7266), 27 states have call successors, (27), 27 states have call predecessors, (27), 98 states have return successors, (488), 55 states have call predecessors, (488), 26 states have call successors, (488) [2023-04-01 04:27:49,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5485 states to 5485 states and 7781 transitions. [2023-04-01 04:27:49,543 INFO L78 Accepts]: Start accepts. Automaton has 5485 states and 7781 transitions. Word has length 38 [2023-04-01 04:27:49,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:27:49,544 INFO L495 AbstractCegarLoop]: Abstraction has 5485 states and 7781 transitions. [2023-04-01 04:27:49,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:27:49,544 INFO L276 IsEmpty]: Start isEmpty. Operand 5485 states and 7781 transitions. [2023-04-01 04:27:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-04-01 04:27:49,556 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:27:49,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:27:49,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:27:49,764 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 [2023-04-01 04:27:49,765 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:27:49,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:27:49,765 INFO L85 PathProgramCache]: Analyzing trace with hash 731592532, now seen corresponding path program 1 times [2023-04-01 04:27:49,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:27:49,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240751695] [2023-04-01 04:27:49,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:49,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:27:49,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:50,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:27:50,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240751695] [2023-04-01 04:27:50,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240751695] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:27:50,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20572440] [2023-04-01 04:27:50,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:27:50,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:27:50,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:27:50,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:27:50,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:27:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:27:50,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:27:50,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:27:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:50,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:27:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:27:50,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20572440] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:27:50,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986638193] [2023-04-01 04:27:50,422 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-04-01 04:27:50,422 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:27:50,429 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:27:50,433 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:27:50,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:27:50,582 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 44 for LOIs [2023-04-01 04:27:50,703 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2023-04-01 04:28:05,364 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 52