/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/Problem16_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:18:00,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:18:00,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:18:00,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:18:00,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:18:00,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:18:00,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:18:00,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:18:00,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:18:00,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:18:00,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:18:00,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:18:00,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:18:00,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:18:01,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:18:01,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:18:01,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:18:01,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:18:01,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:18:01,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:18:01,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:18:01,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:18:01,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:18:01,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:18:01,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:18:01,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:18:01,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:18:01,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:18:01,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:18:01,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:18:01,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:18:01,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:18:01,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:18:01,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:18:01,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:18:01,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:18:01,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:18:01,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:18:01,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:18:01,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:18:01,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:18:01,035 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 04:18:01,074 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:18:01,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:18:01,074 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:18:01,074 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:18:01,075 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:18:01,075 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:18:01,075 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:18:01,075 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:18:01,075 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:18:01,075 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:18:01,075 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:18:01,075 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:18:01,075 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:18:01,075 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:18:01,075 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:18:01,076 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:18:01,076 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:18:01,076 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:18:01,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:18:01,076 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:18:01,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:18:01,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:18:01,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:18:01,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:18:01,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:18:01,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:18:01,077 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:18:01,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:18:01,077 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:18:01,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:18:01,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:18:01,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:18:01,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:18:01,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:18:01,078 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:18:01,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:18:01,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:18:01,078 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:18:01,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:18:01,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:18:01,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:18:01,078 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:18:01,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:18:01,404 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:18:01,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:18:01,408 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:18:01,408 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:18:01,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label22.c [2023-04-01 04:18:02,681 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:18:02,929 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:18:02,929 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label22.c [2023-04-01 04:18:02,943 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbdb7f6ed/70ac967a9c8948a2b7a9a8dd92249c1f/FLAG7cb3a06e2 [2023-04-01 04:18:02,954 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fbdb7f6ed/70ac967a9c8948a2b7a9a8dd92249c1f [2023-04-01 04:18:02,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:18:02,957 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:18:02,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:18:02,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:18:02,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:18:02,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:18:02" (1/1) ... [2023-04-01 04:18:02,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@629a824c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:02, skipping insertion in model container [2023-04-01 04:18:02,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:18:02" (1/1) ... [2023-04-01 04:18:02,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:18:03,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:18:03,159 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/Problem16_label22.c[1636,1649] [2023-04-01 04:18:03,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:18:03,466 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:18:03,481 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/Problem16_label22.c[1636,1649] [2023-04-01 04:18:03,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:18:03,669 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:18:03,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:03 WrapperNode [2023-04-01 04:18:03,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:18:03,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:18:03,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:18:03,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:18:03,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:03" (1/1) ... [2023-04-01 04:18:03,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:03" (1/1) ... [2023-04-01 04:18:03,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:03" (1/1) ... [2023-04-01 04:18:03,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:03" (1/1) ... [2023-04-01 04:18:03,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:03" (1/1) ... [2023-04-01 04:18:03,777 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:03" (1/1) ... [2023-04-01 04:18:03,785 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:03" (1/1) ... [2023-04-01 04:18:03,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:03" (1/1) ... [2023-04-01 04:18:03,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:18:03,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:18:03,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:18:03,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:18:03,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:03" (1/1) ... [2023-04-01 04:18:03,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:18:03,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:18:03,834 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 04:18:03,897 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 04:18:03,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:18:03,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:18:03,911 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:18:03,912 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:18:03,912 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:18:03,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:18:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:18:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:18:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:18:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:18:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:18:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:18:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:18:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:18:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:18:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:18:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:18:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:18:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:18:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:18:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:18:03,981 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:18:03,983 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:18:05,630 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:18:06,532 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:18:06,532 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:18:06,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:18:06 BoogieIcfgContainer [2023-04-01 04:18:06,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:18:06,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:18:06,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:18:06,540 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:18:06,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:18:02" (1/3) ... [2023-04-01 04:18:06,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2497d235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:18:06, skipping insertion in model container [2023-04-01 04:18:06,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:18:03" (2/3) ... [2023-04-01 04:18:06,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2497d235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:18:06, skipping insertion in model container [2023-04-01 04:18:06,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:18:06" (3/3) ... [2023-04-01 04:18:06,542 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label22.c [2023-04-01 04:18:06,554 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:18:06,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:18:06,587 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:18:06,592 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;@1d92a015, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:18:06,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:18:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:18:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:18:06,600 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:06,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:18:06,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:06,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:06,604 INFO L85 PathProgramCache]: Analyzing trace with hash -706741658, now seen corresponding path program 1 times [2023-04-01 04:18:06,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:06,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015916808] [2023-04-01 04:18:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:06,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:06,847 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 04:18:06,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:06,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015916808] [2023-04-01 04:18:06,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015916808] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:18:06,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:18:06,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:18:06,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909233877] [2023-04-01 04:18:06,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:18:06,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:18:06,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:18:06,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:18:06,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:18:06,888 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 04:18:08,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:18:08,021 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:18:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:18:08,024 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 04:18:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:18:08,035 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:18:08,035 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:18:08,040 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 04:18:08,043 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 300 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:18:08,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 74 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-04-01 04:18:08,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:18:08,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 467. [2023-04-01 04:18:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 457 states have (on average 1.87308533916849) internal successors, (856), 457 states have internal predecessors, (856), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:18:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 867 transitions. [2023-04-01 04:18:08,096 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 867 transitions. Word has length 11 [2023-04-01 04:18:08,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:18:08,096 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 867 transitions. [2023-04-01 04:18:08,096 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 04:18:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 867 transitions. [2023-04-01 04:18:08,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-04-01 04:18:08,098 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:08,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:18:08,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:18:08,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:08,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:08,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1772509469, now seen corresponding path program 1 times [2023-04-01 04:18:08,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:08,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799488209] [2023-04-01 04:18:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:08,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:08,375 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 04:18:08,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:08,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799488209] [2023-04-01 04:18:08,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799488209] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:18:08,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:18:08,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:18:08,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514326152] [2023-04-01 04:18:08,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:18:08,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:18:08,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:18:08,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:18:08,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:18:08,378 INFO L87 Difference]: Start difference. First operand 467 states and 867 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 04:18:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:18:09,659 INFO L93 Difference]: Finished difference Result 1405 states and 2628 transitions. [2023-04-01 04:18:09,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:18:09,660 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 59 [2023-04-01 04:18:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:18:09,682 INFO L225 Difference]: With dead ends: 1405 [2023-04-01 04:18:09,683 INFO L226 Difference]: Without dead ends: 943 [2023-04-01 04:18:09,690 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 04:18:09,703 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 922 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:18:09,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 45 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-04-01 04:18:09,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2023-04-01 04:18:09,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 714. [2023-04-01 04:18:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 695 states have (on average 1.720863309352518) internal successors, (1196), 698 states have internal predecessors, (1196), 8 states have call successors, (8), 8 states have call predecessors, (8), 10 states have return successors, (21), 7 states have call predecessors, (21), 7 states have call successors, (21) [2023-04-01 04:18:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1225 transitions. [2023-04-01 04:18:09,775 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1225 transitions. Word has length 59 [2023-04-01 04:18:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:18:09,776 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 1225 transitions. [2023-04-01 04:18:09,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 4 states have internal predecessors, (53), 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 04:18:09,776 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1225 transitions. [2023-04-01 04:18:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-04-01 04:18:09,779 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:09,779 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-04-01 04:18:09,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:18:09,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:09,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:09,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1887441872, now seen corresponding path program 1 times [2023-04-01 04:18:09,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:09,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058894540] [2023-04-01 04:18:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:09,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:18:10,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:10,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058894540] [2023-04-01 04:18:10,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058894540] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:18:10,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88844067] [2023-04-01 04:18:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:10,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:18:10,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:18:10,125 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 04:18:10,142 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 04:18:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:10,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:18:10,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:18:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:18:10,423 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:18:10,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88844067] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:18:10,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:18:10,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-04-01 04:18:10,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218702472] [2023-04-01 04:18:10,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:18:10,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:18:10,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:18:10,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:18:10,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-04-01 04:18:10,425 INFO L87 Difference]: Start difference. First operand 714 states and 1225 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 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 04:18:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:18:11,369 INFO L93 Difference]: Finished difference Result 1907 states and 3294 transitions. [2023-04-01 04:18:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:18:11,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 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 115 [2023-04-01 04:18:11,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:18:11,375 INFO L225 Difference]: With dead ends: 1907 [2023-04-01 04:18:11,375 INFO L226 Difference]: Without dead ends: 1198 [2023-04-01 04:18:11,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-04-01 04:18:11,378 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 799 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 585 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:18:11,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 46 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [585 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 04:18:11,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2023-04-01 04:18:11,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 1176. [2023-04-01 04:18:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1148 states have (on average 1.5609756097560976) internal successors, (1792), 1154 states have internal predecessors, (1792), 11 states have call successors, (11), 11 states have call predecessors, (11), 16 states have return successors, (50), 10 states have call predecessors, (50), 10 states have call successors, (50) [2023-04-01 04:18:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1853 transitions. [2023-04-01 04:18:11,429 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1853 transitions. Word has length 115 [2023-04-01 04:18:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:18:11,431 INFO L495 AbstractCegarLoop]: Abstraction has 1176 states and 1853 transitions. [2023-04-01 04:18:11,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 4 states have internal predecessors, (103), 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 04:18:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1853 transitions. [2023-04-01 04:18:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-04-01 04:18:11,443 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:18:11,444 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, 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, 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 04:18:11,505 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 04:18:11,649 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 04:18:11,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:18:11,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:18:11,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1434781951, now seen corresponding path program 1 times [2023-04-01 04:18:11,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:18:11,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800324555] [2023-04-01 04:18:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:11,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:18:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-04-01 04:18:11,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:18:11,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800324555] [2023-04-01 04:18:11,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800324555] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:18:11,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920696499] [2023-04-01 04:18:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:18:11,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:18:11,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:18:11,895 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 04:18:11,930 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 04:18:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:18:12,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:18:12,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:18:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 04:18:12,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:18:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-04-01 04:18:12,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920696499] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:18:12,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [337156530] [2023-04-01 04:18:12,371 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2023-04-01 04:18:12,371 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:18:12,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:18:12,378 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:18:12,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:18:12,482 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 46 for LOIs [2023-04-01 04:18:12,590 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2023-04-01 04:18:16,279 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 54