/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem18_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:29:58,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:29:58,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:29:58,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:29:58,559 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:29:58,562 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:29:58,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:29:58,569 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:29:58,570 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:29:58,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:29:58,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:29:58,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:29:58,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:29:58,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:29:58,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:29:58,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:29:58,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:29:58,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:29:58,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:29:58,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:29:58,589 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:29:58,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:29:58,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:29:58,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:29:58,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:29:58,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:29:58,600 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:29:58,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:29:58,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:29:58,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:29:58,603 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:29:58,603 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:29:58,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:29:58,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:29:58,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:29:58,606 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:29:58,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:29:58,607 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:29:58,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:29:58,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:29:58,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:29:58,610 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:29:58,638 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:29:58,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:29:58,639 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:29:58,639 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:29:58,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:29:58,640 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:29:58,640 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:29:58,640 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:29:58,640 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:29:58,640 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:29:58,641 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:29:58,641 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:29:58,641 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:29:58,642 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:29:58,642 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:29:58,642 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:29:58,642 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:29:58,642 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:29:58,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:29:58,643 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:29:58,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:29:58,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:29:58,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:29:58,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:29:58,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:29:58,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:29:58,644 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:29:58,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:29:58,645 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:29:58,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:29:58,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:29:58,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:29:58,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:29:58,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:29:58,646 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:29:58,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:29:58,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:29:58,646 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:29:58,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:29:58,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:29:58,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:29:58,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:29:58,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:29:58,923 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:29:58,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:29:58,926 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:29:58,927 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:29:58,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label20.c [2023-04-01 10:30:00,029 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:30:00,448 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:30:00,448 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label20.c [2023-04-01 10:30:00,472 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ea6c361/45783eb8c0264c4bbb62b1cd17db2dcc/FLAG926a80b0f [2023-04-01 10:30:00,488 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83ea6c361/45783eb8c0264c4bbb62b1cd17db2dcc [2023-04-01 10:30:00,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:30:00,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:30:00,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:30:00,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:30:00,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:30:00,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:30:00" (1/1) ... [2023-04-01 10:30:00,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab008fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:00, skipping insertion in model container [2023-04-01 10:30:00,501 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:30:00" (1/1) ... [2023-04-01 10:30:00,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:30:00,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:30:00,805 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_label20.c[1084,1097] [2023-04-01 10:30:01,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:30:01,444 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:30:01,456 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_label20.c[1084,1097] [2023-04-01 10:30:01,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:30:01,728 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:30:01,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:01 WrapperNode [2023-04-01 10:30:01,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:30:01,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:30:01,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:30:01,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:30:01,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:01" (1/1) ... [2023-04-01 10:30:01,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:01" (1/1) ... [2023-04-01 10:30:01,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:01" (1/1) ... [2023-04-01 10:30:01,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:01" (1/1) ... [2023-04-01 10:30:01,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:01" (1/1) ... [2023-04-01 10:30:01,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:01" (1/1) ... [2023-04-01 10:30:01,906 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:01" (1/1) ... [2023-04-01 10:30:01,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:01" (1/1) ... [2023-04-01 10:30:01,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:30:01,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:30:01,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:30:01,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:30:01,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:01" (1/1) ... [2023-04-01 10:30:01,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:30:01,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:30:01,975 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:30:02,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:30:02,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:30:02,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:30:02,024 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:30:02,024 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:30:02,024 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:30:02,024 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 10:30:02,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:30:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:30:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:30:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 10:30:02,024 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:30:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:30:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:30:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:30:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:30:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:30:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:30:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:30:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:30:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:30:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:30:02,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:30:02,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:30:02,115 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:30:02,118 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:30:05,038 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:30:11,911 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:30:11,911 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:30:11,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:30:11 BoogieIcfgContainer [2023-04-01 10:30:11,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:30:11,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:30:11,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:30:11,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:30:11,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:30:00" (1/3) ... [2023-04-01 10:30:11,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe438d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:30:11, skipping insertion in model container [2023-04-01 10:30:11,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:30:01" (2/3) ... [2023-04-01 10:30:11,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fe438d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:30:11, skipping insertion in model container [2023-04-01 10:30:11,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:30:11" (3/3) ... [2023-04-01 10:30:11,922 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem18_label20.c [2023-04-01 10:30:11,939 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:30:11,939 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:30:12,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:30:12,007 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;@19feffd0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:30:12,007 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:30:12,013 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 10:30:12,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:30:12,019 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:30:12,019 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:30:12,020 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:30:12,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:30:12,023 INFO L85 PathProgramCache]: Analyzing trace with hash 312454867, now seen corresponding path program 1 times [2023-04-01 10:30:12,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:30:12,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777443811] [2023-04-01 10:30:12,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:12,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:30:12,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:30:12,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:30:12,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777443811] [2023-04-01 10:30:12,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777443811] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:30:12,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:30:12,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:30:12,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244364753] [2023-04-01 10:30:12,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:30:12,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:30:12,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:30:12,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:30:12,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:30:12,319 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 10:30:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:30:14,515 INFO L93 Difference]: Finished difference Result 1393 states and 2727 transitions. [2023-04-01 10:30:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:30:14,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 10:30:14,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:30:14,535 INFO L225 Difference]: With dead ends: 1393 [2023-04-01 10:30:14,536 INFO L226 Difference]: Without dead ends: 921 [2023-04-01 10:30:14,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:30:14,546 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 472 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:30:14,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 368 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 10:30:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2023-04-01 10:30:14,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 919. [2023-04-01 10:30:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 905 states have (on average 1.6209944751381216) internal successors, (1467), 905 states have internal predecessors, (1467), 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 10:30:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1484 transitions. [2023-04-01 10:30:14,637 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1484 transitions. Word has length 11 [2023-04-01 10:30:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:30:14,638 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1484 transitions. [2023-04-01 10:30:14,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 10:30:14,638 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1484 transitions. [2023-04-01 10:30:14,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 10:30:14,640 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:30:14,640 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:30:14,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:30:14,640 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:30:14,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:30:14,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1943879606, now seen corresponding path program 1 times [2023-04-01 10:30:14,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:30:14,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984020027] [2023-04-01 10:30:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:14,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:30:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:30:14,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:30:14,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984020027] [2023-04-01 10:30:14,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984020027] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:30:14,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:30:14,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:30:14,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700717258] [2023-04-01 10:30:14,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:30:14,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:30:14,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:30:14,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:30:14,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:30:14,899 INFO L87 Difference]: Start difference. First operand 919 states and 1484 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:30:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:30:18,129 INFO L93 Difference]: Finished difference Result 2797 states and 4545 transitions. [2023-04-01 10:30:18,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:30:18,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 22 [2023-04-01 10:30:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:30:18,140 INFO L225 Difference]: With dead ends: 2797 [2023-04-01 10:30:18,141 INFO L226 Difference]: Without dead ends: 1883 [2023-04-01 10:30:18,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:30:18,145 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 1522 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3160 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 3696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 3160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:30:18,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1522 Valid, 99 Invalid, 3696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 3160 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 10:30:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2023-04-01 10:30:18,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1843. [2023-04-01 10:30:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1809 states have (on average 1.4151464897733554) internal successors, (2560), 1816 states have internal predecessors, (2560), 11 states have call successors, (11), 11 states have call predecessors, (11), 22 states have return successors, (54), 15 states have call predecessors, (54), 10 states have call successors, (54) [2023-04-01 10:30:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2625 transitions. [2023-04-01 10:30:18,210 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2625 transitions. Word has length 22 [2023-04-01 10:30:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:30:18,210 INFO L495 AbstractCegarLoop]: Abstraction has 1843 states and 2625 transitions. [2023-04-01 10:30:18,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:30:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2625 transitions. [2023-04-01 10:30:18,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 10:30:18,212 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:30:18,212 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:30:18,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:30:18,213 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:30:18,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:30:18,213 INFO L85 PathProgramCache]: Analyzing trace with hash 993556184, now seen corresponding path program 1 times [2023-04-01 10:30:18,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:30:18,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223566882] [2023-04-01 10:30:18,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:18,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:30:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:18,492 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 10:30:18,492 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:30:18,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223566882] [2023-04-01 10:30:18,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223566882] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:30:18,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994652881] [2023-04-01 10:30:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:18,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:30:18,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:30:18,494 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 10:30:18,496 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 10:30:18,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:18,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 10:30:18,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:30:18,703 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 10:30:18,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 10:30:18,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994652881] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:30:18,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 10:30:18,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 10:30:18,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886969146] [2023-04-01 10:30:18,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:30:18,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:30:18,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:30:18,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:30:18,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 10:30:18,705 INFO L87 Difference]: Start difference. First operand 1843 states and 2625 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 10:30:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:30:21,365 INFO L93 Difference]: Finished difference Result 5615 states and 8143 transitions. [2023-04-01 10:30:21,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:30:21,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 32 [2023-04-01 10:30:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:30:21,383 INFO L225 Difference]: With dead ends: 5615 [2023-04-01 10:30:21,384 INFO L226 Difference]: Without dead ends: 3777 [2023-04-01 10:30:21,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 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 10:30:21,393 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1574 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 2431 mSolverCounterSat, 1024 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1574 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 3455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1024 IncrementalHoareTripleChecker+Valid, 2431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-04-01 10:30:21,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1574 Valid, 62 Invalid, 3455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1024 Valid, 2431 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-04-01 10:30:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2023-04-01 10:30:21,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3658. [2023-04-01 10:30:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3658 states, 3573 states have (on average 1.2555275678701372) internal successors, (4486), 3601 states have internal predecessors, (4486), 19 states have call successors, (19), 19 states have call predecessors, (19), 65 states have return successors, (195), 37 states have call predecessors, (195), 18 states have call successors, (195) [2023-04-01 10:30:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3658 states to 3658 states and 4700 transitions. [2023-04-01 10:30:21,503 INFO L78 Accepts]: Start accepts. Automaton has 3658 states and 4700 transitions. Word has length 32 [2023-04-01 10:30:21,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:30:21,503 INFO L495 AbstractCegarLoop]: Abstraction has 3658 states and 4700 transitions. [2023-04-01 10:30:21,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 10:30:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3658 states and 4700 transitions. [2023-04-01 10:30:21,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-01 10:30:21,505 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:30:21,505 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] [2023-04-01 10:30:21,558 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 10:30:21,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:30:21,711 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:30:21,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:30:21,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1788884871, now seen corresponding path program 1 times [2023-04-01 10:30:21,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:30:21,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236908595] [2023-04-01 10:30:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:21,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:30:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:30:21,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:30:21,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236908595] [2023-04-01 10:30:21,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236908595] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:30:21,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:30:21,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:30:21,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107876850] [2023-04-01 10:30:21,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:30:21,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:30:21,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:30:21,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:30:21,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:30:21,842 INFO L87 Difference]: Start difference. First operand 3658 states and 4700 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-04-01 10:30:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:30:23,718 INFO L93 Difference]: Finished difference Result 9168 states and 12163 transitions. [2023-04-01 10:30:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:30:23,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 49 [2023-04-01 10:30:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:30:23,739 INFO L225 Difference]: With dead ends: 9168 [2023-04-01 10:30:23,739 INFO L226 Difference]: Without dead ends: 5515 [2023-04-01 10:30:23,747 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 [2023-04-01 10:30:23,748 INFO L413 NwaCegarLoop]: 820 mSDtfsCounter, 492 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:30:23,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 842 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 10:30:23,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2023-04-01 10:30:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 4958. [2023-04-01 10:30:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4958 states, 4846 states have (on average 1.2150226991333057) internal successors, (5888), 4883 states have internal predecessors, (5888), 25 states have call successors, (25), 25 states have call predecessors, (25), 86 states have return successors, (309), 49 states have call predecessors, (309), 24 states have call successors, (309) [2023-04-01 10:30:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4958 states to 4958 states and 6222 transitions. [2023-04-01 10:30:23,847 INFO L78 Accepts]: Start accepts. Automaton has 4958 states and 6222 transitions. Word has length 49 [2023-04-01 10:30:23,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:30:23,848 INFO L495 AbstractCegarLoop]: Abstraction has 4958 states and 6222 transitions. [2023-04-01 10:30:23,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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) [2023-04-01 10:30:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4958 states and 6222 transitions. [2023-04-01 10:30:23,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 10:30:23,853 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:30:23,854 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:30:23,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 10:30:23,854 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:30:23,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:30:23,855 INFO L85 PathProgramCache]: Analyzing trace with hash 18971913, now seen corresponding path program 1 times [2023-04-01 10:30:23,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:30:23,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996887968] [2023-04-01 10:30:23,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:23,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:30:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 65 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 10:30:24,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:30:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996887968] [2023-04-01 10:30:24,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996887968] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:30:24,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303698848] [2023-04-01 10:30:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:30:24,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:30:24,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:30:24,133 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 10:30:24,162 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 10:30:24,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:30:24,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:30:24,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:30:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 10:30:24,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:30:24,604 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 65 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 10:30:24,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303698848] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:30:24,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [322555944] [2023-04-01 10:30:24,661 INFO L159 IcfgInterpreter]: Started Sifa with 70 locations of interest [2023-04-01 10:30:24,661 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:30:24,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:30:24,682 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:30:24,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:30:24,967 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 76 for LOIs [2023-04-01 10:30:25,266 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 61 [2023-04-01 10:30:55,166 WARN L223 SmtUtils]: Spent 21.43s on a formula simplification that was a NOOP. DAG size: 1516 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)