/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/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:58:30,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:58:30,003 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:58:30,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:58:30,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:58:30,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:58:30,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:58:30,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:58:30,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:58:30,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:58:30,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:58:30,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:58:30,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:58:30,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:58:30,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:58:30,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:58:30,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:58:30,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:58:30,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:58:30,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:58:30,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:58:30,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:58:30,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:58:30,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:58:30,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:58:30,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:58:30,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:58:30,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:58:30,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:58:30,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:58:30,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:58:30,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:58:30,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:58:30,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:58:30,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:58:30,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:58:30,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:58:30,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:58:30,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:58:30,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:58:30,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:58:30,086 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 04:58:30,112 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:58:30,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:58:30,113 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:58:30,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:58:30,113 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:58:30,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:58:30,114 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:58:30,114 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:58:30,114 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:58:30,114 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:58:30,114 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:58:30,114 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:58:30,114 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:58:30,115 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:58:30,115 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:58:30,115 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:58:30,115 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:58:30,115 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:58:30,116 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:58:30,116 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:58:30,116 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:58:30,116 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:58:30,116 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:58:30,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:58:30,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:58:30,118 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:58:30,118 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:58:30,118 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:58:30,119 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:58:30,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:58:30,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:58:30,119 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:58:30,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:58:30,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:58:30,120 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:58:30,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:58:30,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:58:30,121 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:58:30,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:58:30,121 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:58:30,121 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:58:30,121 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:58:30,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:58:30,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:58:30,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:58:30,341 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:58:30,344 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:58:30,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/linear_sea.ch.c [2023-04-01 04:58:31,536 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:58:31,706 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:58:31,706 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/linear_sea.ch.c [2023-04-01 04:58:31,712 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3b9e5e63/4aa4d8bdbb394187a4f38cdecd2c8657/FLAG47b7a3ca0 [2023-04-01 04:58:31,722 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3b9e5e63/4aa4d8bdbb394187a4f38cdecd2c8657 [2023-04-01 04:58:31,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:58:31,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:58:31,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:58:31,726 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:58:31,732 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:58:31,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:58:31" (1/1) ... [2023-04-01 04:58:31,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4284c217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:31, skipping insertion in model container [2023-04-01 04:58:31,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:58:31" (1/1) ... [2023-04-01 04:58:31,741 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:58:31,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:58:31,863 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/loops/linear_sea.ch.c[383,396] [2023-04-01 04:58:31,882 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:58:31,893 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:58:31,904 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/loops/linear_sea.ch.c[383,396] [2023-04-01 04:58:31,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:58:31,922 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:58:31,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:31 WrapperNode [2023-04-01 04:58:31,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:58:31,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:58:31,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:58:31,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:58:31,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:31" (1/1) ... [2023-04-01 04:58:31,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:31" (1/1) ... [2023-04-01 04:58:31,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:31" (1/1) ... [2023-04-01 04:58:31,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:31" (1/1) ... [2023-04-01 04:58:31,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:31" (1/1) ... [2023-04-01 04:58:31,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:31" (1/1) ... [2023-04-01 04:58:31,946 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:31" (1/1) ... [2023-04-01 04:58:31,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:31" (1/1) ... [2023-04-01 04:58:31,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:58:31,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:58:31,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:58:31,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:58:31,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:31" (1/1) ... [2023-04-01 04:58:31,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:58:31,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:31,978 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 04:58:31,979 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 04:58:32,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:58:32,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:58:32,003 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:58:32,004 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 04:58:32,004 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2023-04-01 04:58:32,004 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:58:32,004 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-04-01 04:58:32,004 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:58:32,004 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:58:32,004 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:58:32,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:58:32,004 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 04:58:32,004 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 04:58:32,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-04-01 04:58:32,005 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2023-04-01 04:58:32,005 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:58:32,005 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:58:32,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 04:58:32,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-04-01 04:58:32,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:58:32,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:58:32,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:58:32,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:58:32,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:58:32,086 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:58:32,088 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:58:32,245 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:58:32,291 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:58:32,291 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:58:32,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:58:32 BoogieIcfgContainer [2023-04-01 04:58:32,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:58:32,306 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:58:32,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:58:32,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:58:32,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:58:31" (1/3) ... [2023-04-01 04:58:32,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4952ef55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:58:32, skipping insertion in model container [2023-04-01 04:58:32,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:58:31" (2/3) ... [2023-04-01 04:58:32,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4952ef55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:58:32, skipping insertion in model container [2023-04-01 04:58:32,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:58:32" (3/3) ... [2023-04-01 04:58:32,311 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2023-04-01 04:58:32,351 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:58:32,351 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:58:32,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:58:32,415 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;@6286c60b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:58:32,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:58:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:58:32,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 04:58:32,423 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:32,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:32,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:32,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:32,427 INFO L85 PathProgramCache]: Analyzing trace with hash 438482315, now seen corresponding path program 1 times [2023-04-01 04:58:32,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:32,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254565165] [2023-04-01 04:58:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:32,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:32,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:32,684 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 04:58:32,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:32,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254565165] [2023-04-01 04:58:32,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254565165] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:58:32,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:58:32,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 04:58:32,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262994159] [2023-04-01 04:58:32,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:58:32,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 04:58:32,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:32,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 04:58:32,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:58:32,733 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:58:32,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:32,783 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-04-01 04:58:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 04:58:32,787 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2023-04-01 04:58:32,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:32,792 INFO L225 Difference]: With dead ends: 44 [2023-04-01 04:58:32,792 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 04:58:32,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:58:32,799 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:32,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:58:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 04:58:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-01 04:58:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:58:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2023-04-01 04:58:32,833 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2023-04-01 04:58:32,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:32,834 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2023-04-01 04:58:32,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:58:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2023-04-01 04:58:32,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:58:32,837 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:32,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:32,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:58:32,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:32,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:32,838 INFO L85 PathProgramCache]: Analyzing trace with hash -916367174, now seen corresponding path program 1 times [2023-04-01 04:58:32,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:32,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881731521] [2023-04-01 04:58:32,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:32,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:33,625 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 04:58:33,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:33,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881731521] [2023-04-01 04:58:33,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881731521] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:58:33,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:58:33,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-04-01 04:58:33,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433154471] [2023-04-01 04:58:33,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:58:33,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-04-01 04:58:33,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:33,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-04-01 04:58:33,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-04-01 04:58:33,634 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:58:33,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:33,993 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2023-04-01 04:58:33,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 04:58:33,994 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-04-01 04:58:33,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:33,995 INFO L225 Difference]: With dead ends: 32 [2023-04-01 04:58:33,996 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 04:58:33,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-04-01 04:58:34,003 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:34,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 67 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:58:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 04:58:34,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-01 04:58:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:58:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2023-04-01 04:58:34,016 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2023-04-01 04:58:34,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:34,017 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2023-04-01 04:58:34,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 04:58:34,017 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2023-04-01 04:58:34,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:58:34,018 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:34,018 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:34,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:58:34,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:34,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:34,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2104893007, now seen corresponding path program 1 times [2023-04-01 04:58:34,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:34,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482432622] [2023-04-01 04:58:34,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:34,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:34,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:34,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482432622] [2023-04-01 04:58:34,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482432622] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:58:34,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145351621] [2023-04-01 04:58:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:34,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:34,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:34,213 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 04:58:34,241 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 04:58:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:34,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 04:58:34,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:34,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:58:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:34,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145351621] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:58:34,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [435269175] [2023-04-01 04:58:34,742 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 04:58:34,743 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:58:34,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:58:34,750 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:58:34,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:58:34,827 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 04:58:35,243 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2023-04-01 04:58:35,252 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 57 for LOIs [2023-04-01 04:58:35,264 INFO L197 IcfgInterpreter]: Interpreting procedure linear_search with input of size 56 for LOIs [2023-04-01 04:58:35,534 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 04:58:35,541 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:58:38,751 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '386#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:58:38,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:58:38,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:58:38,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-04-01 04:58:38,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045620506] [2023-04-01 04:58:38,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:58:38,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-01 04:58:38,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:38,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-01 04:58:38,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1138, Unknown=7, NotChecked=0, Total=1260 [2023-04-01 04:58:38,755 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 18 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 04:58:39,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:39,015 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2023-04-01 04:58:39,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 04:58:39,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 23 [2023-04-01 04:58:39,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:39,017 INFO L225 Difference]: With dead ends: 34 [2023-04-01 04:58:39,017 INFO L226 Difference]: Without dead ends: 26 [2023-04-01 04:58:39,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=151, Invalid=1482, Unknown=7, NotChecked=0, Total=1640 [2023-04-01 04:58:39,018 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:39,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:58:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-01 04:58:39,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-01 04:58:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:58:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2023-04-01 04:58:39,028 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2023-04-01 04:58:39,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:39,028 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2023-04-01 04:58:39,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.066666666666667) internal successors, (31), 16 states have internal predecessors, (31), 4 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-04-01 04:58:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2023-04-01 04:58:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:58:39,030 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:39,030 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:39,039 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 04:58:39,230 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 04:58:39,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:39,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:39,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1816917784, now seen corresponding path program 2 times [2023-04-01 04:58:39,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:39,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946304317] [2023-04-01 04:58:39,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:39,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:40,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:40,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946304317] [2023-04-01 04:58:40,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946304317] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:58:40,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016167492] [2023-04-01 04:58:40,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:58:40,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:40,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:40,426 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 04:58:40,429 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 04:58:40,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 04:58:40,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:58:40,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 04:58:40,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:40,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 60 [2023-04-01 04:58:40,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2023-04-01 04:58:40,632 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-04-01 04:58:41,303 INFO L321 Elim1Store]: treesize reduction 19, result has 51.3 percent of original size [2023-04-01 04:58:41,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2023-04-01 04:58:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:41,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:58:42,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2023-04-01 04:58:42,594 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2023-04-01 04:58:42,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2023-04-01 04:58:42,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:42,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016167492] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:58:42,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1452968660] [2023-04-01 04:58:42,607 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 04:58:42,607 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:58:42,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:58:42,607 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:58:42,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:58:42,636 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 04:58:42,891 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2023-04-01 04:58:42,897 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 57 for LOIs [2023-04-01 04:58:42,905 INFO L197 IcfgInterpreter]: Interpreting procedure linear_search with input of size 56 for LOIs [2023-04-01 04:58:43,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 04:58:43,100 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:58:47,050 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '681#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:58:47,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:58:47,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:58:47,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 32 [2023-04-01 04:58:47,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378624279] [2023-04-01 04:58:47,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:58:47,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 04:58:47,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:58:47,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 04:58:47,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2263, Unknown=4, NotChecked=0, Total=2450 [2023-04-01 04:58:47,053 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 32 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 29 states have internal predecessors, (44), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 04:58:48,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:58:48,961 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2023-04-01 04:58:48,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 04:58:48,962 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 29 states have internal predecessors, (44), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 25 [2023-04-01 04:58:48,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:58:48,964 INFO L225 Difference]: With dead ends: 36 [2023-04-01 04:58:48,964 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 04:58:48,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=364, Invalid=3664, Unknown=4, NotChecked=0, Total=4032 [2023-04-01 04:58:48,966 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:58:48,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 109 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 347 Invalid, 1 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 04:58:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 04:58:48,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 04:58:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:58:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2023-04-01 04:58:48,981 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2023-04-01 04:58:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:58:48,982 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2023-04-01 04:58:48,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 29 states have internal predecessors, (44), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 04:58:48,982 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2023-04-01 04:58:48,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-01 04:58:48,983 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:58:48,983 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:58:48,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:58:49,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 04:58:49,190 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:58:49,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:58:49,190 INFO L85 PathProgramCache]: Analyzing trace with hash 49364575, now seen corresponding path program 3 times [2023-04-01 04:58:49,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:58:49,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188737262] [2023-04-01 04:58:49,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:58:49,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:58:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:58:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:50,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:58:50,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188737262] [2023-04-01 04:58:50,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188737262] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:58:50,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277173178] [2023-04-01 04:58:50,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:58:50,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:58:50,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:58:50,205 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:58:50,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:58:50,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:58:50,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:58:50,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 61 conjunts are in the unsatisfiable core [2023-04-01 04:58:50,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:58:50,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-04-01 04:58:50,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 64 [2023-04-01 04:58:52,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:58:52,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 71 [2023-04-01 04:58:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:52,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:58:56,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:58:56,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277173178] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:58:56,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [486867408] [2023-04-01 04:58:56,509 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 04:58:56,509 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:58:56,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:58:56,509 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:58:56,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:58:56,530 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 04:58:56,705 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2023-04-01 04:58:56,715 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 57 for LOIs [2023-04-01 04:58:56,720 INFO L197 IcfgInterpreter]: Interpreting procedure linear_search with input of size 56 for LOIs [2023-04-01 04:58:56,865 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 04:58:56,869 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:59:00,987 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1027#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:59:00,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:59:00,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:59:00,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 16] total 45 [2023-04-01 04:59:00,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716503461] [2023-04-01 04:59:00,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:59:00,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-04-01 04:59:00,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:59:00,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-04-01 04:59:00,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=3635, Unknown=3, NotChecked=0, Total=3906 [2023-04-01 04:59:00,992 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 45 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 states have internal predecessors, (49), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 04:59:04,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:59:04,664 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2023-04-01 04:59:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 04:59:04,664 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 states have internal predecessors, (49), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 27 [2023-04-01 04:59:04,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:59:04,665 INFO L225 Difference]: With dead ends: 38 [2023-04-01 04:59:04,665 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 04:59:04,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=544, Invalid=6259, Unknown=3, NotChecked=0, Total=6806 [2023-04-01 04:59:04,667 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 75 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:59:04,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 144 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 04:59:04,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 04:59:04,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 04:59:04,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:59:04,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2023-04-01 04:59:04,675 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2023-04-01 04:59:04,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:59:04,675 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2023-04-01 04:59:04,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 41 states have internal predecessors, (49), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-04-01 04:59:04,676 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2023-04-01 04:59:04,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:59:04,676 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:04,676 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:04,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 04:59:04,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:04,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:04,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:04,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1749618154, now seen corresponding path program 4 times [2023-04-01 04:59:04,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:04,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825856659] [2023-04-01 04:59:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:04,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:59:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:07,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:59:07,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825856659] [2023-04-01 04:59:07,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825856659] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:59:07,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849154208] [2023-04-01 04:59:07,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 04:59:07,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:07,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:59:07,845 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:59:07,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:59:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:59:07,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 04:59:07,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:59:08,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-04-01 04:59:08,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 64 [2023-04-01 04:59:09,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:59:09,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 47 [2023-04-01 04:59:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:09,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:59:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:59:13,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849154208] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:59:13,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1487102179] [2023-04-01 04:59:13,982 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 04:59:13,982 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:59:13,983 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:59:13,983 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:59:13,983 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:59:14,003 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2023-04-01 04:59:14,212 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2023-04-01 04:59:14,217 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 57 for LOIs [2023-04-01 04:59:14,225 INFO L197 IcfgInterpreter]: Interpreting procedure linear_search with input of size 56 for LOIs [2023-04-01 04:59:14,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-04-01 04:59:14,377 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:59:18,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1407#(and (<= 1 |#StackHeapBarrier|) (= ~MAX~0 100000) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 04:59:18,279 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:59:18,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:59:18,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 18] total 50 [2023-04-01 04:59:18,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166935337] [2023-04-01 04:59:18,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:59:18,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 04:59:18,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:59:18,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 04:59:18,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=4302, Unknown=6, NotChecked=0, Total=4556 [2023-04-01 04:59:18,282 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 50 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 44 states have internal predecessors, (53), 8 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 04:59:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:59:21,899 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2023-04-01 04:59:21,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 04:59:21,909 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 44 states have internal predecessors, (53), 8 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 29 [2023-04-01 04:59:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:59:21,910 INFO L225 Difference]: With dead ends: 40 [2023-04-01 04:59:21,910 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 04:59:21,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1584 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=441, Invalid=6525, Unknown=6, NotChecked=0, Total=6972 [2023-04-01 04:59:21,912 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:59:21,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 202 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 04:59:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 04:59:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-04-01 04:59:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:59:21,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2023-04-01 04:59:21,930 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 29 [2023-04-01 04:59:21,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:59:21,932 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2023-04-01 04:59:21,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 44 states have internal predecessors, (53), 8 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 04:59:21,932 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2023-04-01 04:59:21,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 04:59:21,934 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:59:21,934 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:59:21,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 04:59:22,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:59:22,141 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:59:22,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:59:22,141 INFO L85 PathProgramCache]: Analyzing trace with hash 299799565, now seen corresponding path program 5 times [2023-04-01 04:59:22,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:59:22,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238350772] [2023-04-01 04:59:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:59:22,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:59:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat