/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/Problem12_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:03:37,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:03:37,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:03:37,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:03:37,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:03:37,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:03:37,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:03:37,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:03:37,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:03:37,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:03:37,962 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:03:37,963 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:03:37,964 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:03:37,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:03:37,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:03:37,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:03:37,969 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:03:37,970 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:03:37,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:03:37,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:03:37,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:03:37,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:03:37,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:03:37,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:03:37,989 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:03:37,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:03:37,990 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:03:37,991 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:03:37,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:03:37,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:03:37,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:03:37,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:03:37,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:03:37,995 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:03:37,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:03:37,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:03:37,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:03:37,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:03:37,997 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:03:37,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:03:37,998 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:03:38,000 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 04:03:38,033 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:03:38,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:03:38,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:03:38,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:03:38,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:03:38,035 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:03:38,035 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:03:38,036 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:03:38,036 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:03:38,036 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:03:38,037 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:03:38,037 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:03:38,037 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:03:38,037 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:03:38,037 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:03:38,037 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:03:38,038 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:03:38,038 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:03:38,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:03:38,039 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:03:38,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:03:38,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:03:38,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:03:38,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:03:38,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:03:38,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:03:38,040 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:03:38,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:03:38,040 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:03:38,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:03:38,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:03:38,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:03:38,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:03:38,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:03:38,041 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:03:38,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:03:38,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:03:38,042 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:03:38,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:03:38,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:03:38,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:03:38,042 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:03:38,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:03:38,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:03:38,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:03:38,281 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:03:38,281 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:03:38,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label58.c [2023-04-01 04:03:39,576 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:03:40,044 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:03:40,044 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label58.c [2023-04-01 04:03:40,074 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/287a045a5/903b22ff602a4e2fae2a81fb6011aec1/FLAGe763ad871 [2023-04-01 04:03:40,088 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/287a045a5/903b22ff602a4e2fae2a81fb6011aec1 [2023-04-01 04:03:40,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:03:40,092 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:03:40,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:03:40,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:03:40,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:03:40,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:03:40" (1/1) ... [2023-04-01 04:03:40,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d334e0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:40, skipping insertion in model container [2023-04-01 04:03:40,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:03:40" (1/1) ... [2023-04-01 04:03:40,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:03:40,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:03:40,471 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label58.c[4474,4487] [2023-04-01 04:03:41,157 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:03:41,172 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:03:41,199 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label58.c[4474,4487] [2023-04-01 04:03:41,574 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:03:41,596 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:03:41,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:41 WrapperNode [2023-04-01 04:03:41,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:03:41,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:03:41,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:03:41,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:03:41,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:41" (1/1) ... [2023-04-01 04:03:41,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:41" (1/1) ... [2023-04-01 04:03:41,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:41" (1/1) ... [2023-04-01 04:03:41,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:41" (1/1) ... [2023-04-01 04:03:41,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:41" (1/1) ... [2023-04-01 04:03:41,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:41" (1/1) ... [2023-04-01 04:03:41,814 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:41" (1/1) ... [2023-04-01 04:03:41,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:41" (1/1) ... [2023-04-01 04:03:41,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:03:41,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:03:41,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:03:41,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:03:41,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:41" (1/1) ... [2023-04-01 04:03:41,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:03:41,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:41,898 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 04:03:41,920 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 04:03:41,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:03:41,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:03:41,937 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:03:41,937 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:03:41,937 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:03:41,937 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-04-01 04:03:41,938 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-04-01 04:03:41,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:03:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:03:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:03:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-04-01 04:03:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-04-01 04:03:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:03:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:03:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:03:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:03:41,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:03:41,939 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:03:41,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:03:41,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:03:41,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:03:41,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:03:41,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:03:41,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:03:41,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:03:42,028 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:03:42,029 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:03:45,941 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:03:46,633 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:03:46,634 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:03:46,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:03:46 BoogieIcfgContainer [2023-04-01 04:03:46,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:03:46,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:03:46,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:03:46,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:03:46,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:03:40" (1/3) ... [2023-04-01 04:03:46,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb2a7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:03:46, skipping insertion in model container [2023-04-01 04:03:46,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:03:41" (2/3) ... [2023-04-01 04:03:46,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb2a7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:03:46, skipping insertion in model container [2023-04-01 04:03:46,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:03:46" (3/3) ... [2023-04-01 04:03:46,647 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label58.c [2023-04-01 04:03:46,667 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:03:46,668 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:03:46,742 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:03:46,748 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;@3ac7d4db, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:03:46,748 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:03:46,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:03:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:03:46,763 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:46,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:03:46,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:46,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:46,771 INFO L85 PathProgramCache]: Analyzing trace with hash 832854242, now seen corresponding path program 1 times [2023-04-01 04:03:46,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:46,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901511575] [2023-04-01 04:03:46,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:46,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:47,105 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 04:03:47,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:47,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901511575] [2023-04-01 04:03:47,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901511575] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:47,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:47,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:03:47,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547590049] [2023-04-01 04:03:47,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:47,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:03:47,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:47,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:03:47,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:03:47,150 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:03:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:50,434 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-04-01 04:03:50,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:03:50,437 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 04:03:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:50,457 INFO L225 Difference]: With dead ends: 2068 [2023-04-01 04:03:50,457 INFO L226 Difference]: Without dead ends: 1371 [2023-04-01 04:03:50,464 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 04:03:50,467 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 846 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:50,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 217 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-04-01 04:03:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-04-01 04:03:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-04-01 04:03:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.857037037037037) internal successors, (2507), 1350 states have internal predecessors, (2507), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-04-01 04:03:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2530 transitions. [2023-04-01 04:03:50,571 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2530 transitions. Word has length 11 [2023-04-01 04:03:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:50,572 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2530 transitions. [2023-04-01 04:03:50,572 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 04:03:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2530 transitions. [2023-04-01 04:03:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:03:50,574 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:50,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:03:50,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:03:50,574 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:50,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:50,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1286320373, now seen corresponding path program 1 times [2023-04-01 04:03:50,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:50,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920277691] [2023-04-01 04:03:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:50,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:50,792 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 04:03:50,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:50,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920277691] [2023-04-01 04:03:50,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920277691] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:50,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:50,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:03:50,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183118637] [2023-04-01 04:03:50,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:50,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:50,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:50,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:50,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:03:50,796 INFO L87 Difference]: Start difference. First operand 1368 states and 2530 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:03:54,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:54,758 INFO L93 Difference]: Finished difference Result 4138 states and 7702 transitions. [2023-04-01 04:03:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:03:54,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-04-01 04:03:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:54,775 INFO L225 Difference]: With dead ends: 4138 [2023-04-01 04:03:54,776 INFO L226 Difference]: Without dead ends: 2775 [2023-04-01 04:03:54,787 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 04:03:54,790 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2488 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3906 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 4816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 3906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:54,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2488 Valid, 118 Invalid, 4816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 3906 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-04-01 04:03:54,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2023-04-01 04:03:54,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2757. [2023-04-01 04:03:54,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2715 states have (on average 1.6976058931860036) internal successors, (4609), 2719 states have internal predecessors, (4609), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (77), 22 states have call predecessors, (77), 14 states have call successors, (77) [2023-04-01 04:03:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4701 transitions. [2023-04-01 04:03:54,901 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4701 transitions. Word has length 25 [2023-04-01 04:03:54,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:54,902 INFO L495 AbstractCegarLoop]: Abstraction has 2757 states and 4701 transitions. [2023-04-01 04:03:54,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 04:03:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4701 transitions. [2023-04-01 04:03:54,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 04:03:54,903 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:54,903 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] [2023-04-01 04:03:54,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:03:54,904 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:54,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:54,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1822213668, now seen corresponding path program 1 times [2023-04-01 04:03:54,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:54,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200125472] [2023-04-01 04:03:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:54,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:55,091 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 04:03:55,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:55,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200125472] [2023-04-01 04:03:55,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200125472] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:03:55,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:03:55,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:03:55,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407649022] [2023-04-01 04:03:55,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:03:55,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:03:55,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:03:55,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:03:55,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:03:55,097 INFO L87 Difference]: Start difference. First operand 2757 states and 4701 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:03:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:03:58,952 INFO L93 Difference]: Finished difference Result 7729 states and 13220 transitions. [2023-04-01 04:03:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:03:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 30 [2023-04-01 04:03:58,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:03:58,983 INFO L225 Difference]: With dead ends: 7729 [2023-04-01 04:03:58,983 INFO L226 Difference]: Without dead ends: 4977 [2023-04-01 04:03:58,992 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 04:03:58,996 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2452 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 1261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1261 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:03:58,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 95 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1261 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-04-01 04:03:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2023-04-01 04:03:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4896. [2023-04-01 04:03:59,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4789 states have (on average 1.579661724785968) internal successors, (7565), 4809 states have internal predecessors, (7565), 24 states have call successors, (24), 24 states have call predecessors, (24), 82 states have return successors, (335), 62 states have call predecessors, (335), 23 states have call successors, (335) [2023-04-01 04:03:59,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 7924 transitions. [2023-04-01 04:03:59,176 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 7924 transitions. Word has length 30 [2023-04-01 04:03:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:03:59,176 INFO L495 AbstractCegarLoop]: Abstraction has 4896 states and 7924 transitions. [2023-04-01 04:03:59,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 04:03:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 7924 transitions. [2023-04-01 04:03:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 04:03:59,179 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:03:59,179 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:03:59,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 04:03:59,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:03:59,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:03:59,181 INFO L85 PathProgramCache]: Analyzing trace with hash 676199972, now seen corresponding path program 1 times [2023-04-01 04:03:59,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:03:59,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060831502] [2023-04-01 04:03:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:59,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:03:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:59,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:03:59,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:03:59,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060831502] [2023-04-01 04:03:59,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060831502] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:03:59,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491550487] [2023-04-01 04:03:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:03:59,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:03:59,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:03:59,353 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 04:03:59,379 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 04:03:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:03:59,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:03:59,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:03:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:03:59,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:03:59,657 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:03:59,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491550487] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:03:59,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [29442373] [2023-04-01 04:03:59,675 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-04-01 04:03:59,676 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:03:59,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:03:59,685 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:03:59,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:03:59,872 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-04-01 04:04:00,103 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2023-04-01 04:04:01,016 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 41271 conjuctions. This might take some time... [2023-04-01 04:04:03,900 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 545 conjuctions. [2023-04-01 04:04:29,388 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 33