/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 IntervalDomain -i ../sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:03:23,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:03:23,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:03:23,596 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:03:23,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:03:23,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:03:23,604 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:03:23,606 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:03:23,607 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:03:23,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:03:23,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:03:23,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:03:23,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:03:23,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:03:23,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:03:23,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:03:23,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:03:23,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:03:23,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:03:23,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:03:23,626 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:03:23,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:03:23,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:03:23,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:03:23,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:03:23,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:03:23,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:03:23,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:03:23,636 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:03:23,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:03:23,637 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:03:23,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:03:23,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:03:23,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:03:23,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:03:23,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:03:23,639 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:03:23,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:03:23,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:03:23,640 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:03:23,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:03:23,642 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 [2023-03-31 23:03:23,668 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:03:23,668 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:03:23,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:03:23,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:03:23,669 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:03:23,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:03:23,670 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:03:23,670 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:03:23,670 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:03:23,670 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:03:23,670 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:03:23,670 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:03:23,671 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:03:23,671 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:03:23,671 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:03:23,671 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:03:23,671 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:03:23,671 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:03:23,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:03:23,671 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:03:23,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:03:23,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:03:23,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:03:23,672 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:03:23,672 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:03:23,672 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:03:23,672 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:03:23,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:03:23,672 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:03:23,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:03:23,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:03:23,673 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:03:23,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:03:23,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:03:23,673 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:03:23,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:03:23,673 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:03:23,673 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:03:23,673 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:03:23,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:03:23,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:03:23,674 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:03:23,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:03:23,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:03:23,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:03:23,859 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:03:23,862 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:03:23,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2023-03-31 23:03:24,877 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:03:25,040 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:03:25,041 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2023-03-31 23:03:25,047 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea661cf8f/240891ff4013414792a3bf0520151072/FLAGd2ee19c23 [2023-03-31 23:03:25,056 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea661cf8f/240891ff4013414792a3bf0520151072 [2023-03-31 23:03:25,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:03:25,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:03:25,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:03:25,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:03:25,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:03:25,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:03:25" (1/1) ... [2023-03-31 23:03:25,070 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29c3af35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:25, skipping insertion in model container [2023-03-31 23:03:25,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:03:25" (1/1) ... [2023-03-31 23:03:25,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:03:25,107 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:03:25,284 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/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529] [2023-03-31 23:03:25,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:03:25,321 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:03:25,377 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/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c[15516,15529] [2023-03-31 23:03:25,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:03:25,390 WARN L667 CHandler]: The function fopen is called, but not defined or handled by StandardFunctionHandler. [2023-03-31 23:03:25,394 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:03:25,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:25 WrapperNode [2023-03-31 23:03:25,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:03:25,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:03:25,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:03:25,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:03:25,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:25" (1/1) ... [2023-03-31 23:03:25,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:25" (1/1) ... [2023-03-31 23:03:25,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:25" (1/1) ... [2023-03-31 23:03:25,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:25" (1/1) ... [2023-03-31 23:03:25,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:25" (1/1) ... [2023-03-31 23:03:25,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:25" (1/1) ... [2023-03-31 23:03:25,463 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:25" (1/1) ... [2023-03-31 23:03:25,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:25" (1/1) ... [2023-03-31 23:03:25,469 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:03:25,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:03:25,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:03:25,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:03:25,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:25" (1/1) ... [2023-03-31 23:03:25,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:03:25,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:03:25,507 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) [2023-03-31 23:03:25,517 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 [2023-03-31 23:03:25,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:03:25,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:03:25,552 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:03:25,552 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:03:25,552 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:03:25,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:03:25,553 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:03:25,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:03:25,553 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2023-03-31 23:03:25,553 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2023-03-31 23:03:25,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:03:25,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:03:25,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 23:03:25,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:03:25,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 23:03:25,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:03:25,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:03:25,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:03:25,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:03:25,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:03:25,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 23:03:25,683 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:03:25,684 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:03:26,217 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:03:26,226 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:03:26,226 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-03-31 23:03:26,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:03:26 BoogieIcfgContainer [2023-03-31 23:03:26,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:03:26,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:03:26,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:03:26,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:03:26,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:03:25" (1/3) ... [2023-03-31 23:03:26,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7987b532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:03:26, skipping insertion in model container [2023-03-31 23:03:26,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:03:25" (2/3) ... [2023-03-31 23:03:26,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7987b532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:03:26, skipping insertion in model container [2023-03-31 23:03:26,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:03:26" (3/3) ... [2023-03-31 23:03:26,234 INFO L112 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2023-03-31 23:03:26,246 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:03:26,246 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:03:26,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:03:26,293 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;@3adb9476, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:03:26,294 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:03:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 23:03:26,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 23:03:26,303 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:03:26,304 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:03:26,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:03:26,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:03:26,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1242807830, now seen corresponding path program 1 times [2023-03-31 23:03:26,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:03:26,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068872475] [2023-03-31 23:03:26,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:03:26,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:03:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:03:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:03:27,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:03:27,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068872475] [2023-03-31 23:03:27,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068872475] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:03:27,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:03:27,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-03-31 23:03:27,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769842464] [2023-03-31 23:03:27,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:03:27,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 23:03:27,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:03:27,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 23:03:27,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-03-31 23:03:27,585 INFO L87 Difference]: Start difference. First operand has 54 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 49 states have internal predecessors, (91), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:03:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:03:28,128 INFO L93 Difference]: Finished difference Result 91 states and 135 transitions. [2023-03-31 23:03:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 23:03:28,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 23:03:28,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:03:28,138 INFO L225 Difference]: With dead ends: 91 [2023-03-31 23:03:28,139 INFO L226 Difference]: Without dead ends: 56 [2023-03-31 23:03:28,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2023-03-31 23:03:28,143 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 91 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:03:28,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 779 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 23:03:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-03-31 23:03:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2023-03-31 23:03:28,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:03:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2023-03-31 23:03:28,168 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2023-03-31 23:03:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:03:28,168 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2023-03-31 23:03:28,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 23:03:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2023-03-31 23:03:28,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-03-31 23:03:28,169 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:03:28,170 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:03:28,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:03:28,170 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:03:28,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:03:28,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1473615159, now seen corresponding path program 1 times [2023-03-31 23:03:28,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:03:28,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579138004] [2023-03-31 23:03:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:03:28,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:03:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:03:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:03:28,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:03:28,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579138004] [2023-03-31 23:03:28,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579138004] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 23:03:28,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914118857] [2023-03-31 23:03:28,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:03:28,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:03:28,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:03:28,849 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) [2023-03-31 23:03:28,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:03:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:03:29,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 23:03:29,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:03:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:03:29,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:03:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:03:29,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914118857] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:03:29,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1674352424] [2023-03-31 23:03:29,656 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-03-31 23:03:29,656 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:03:29,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:03:29,661 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:03:29,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:03:29,828 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 36 for LOIs [2023-03-31 23:03:46,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 25 for LOIs [2023-03-31 23:03:46,310 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:03:53,294 WARN L223 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 687 DAG size of output: 683 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:03:59,412 WARN L223 SmtUtils]: Spent 5.73s on a formula simplification. DAG size of input: 693 DAG size of output: 689 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:04:05,607 WARN L223 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 701 DAG size of output: 697 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:04:11,644 WARN L223 SmtUtils]: Spent 5.68s on a formula simplification. DAG size of input: 705 DAG size of output: 695 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:04:17,760 WARN L223 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 711 DAG size of output: 701 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:04:24,163 WARN L223 SmtUtils]: Spent 6.01s on a formula simplification. DAG size of input: 719 DAG size of output: 709 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-03-31 23:04:30,503 WARN L223 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 722 DAG size of output: 707 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)