/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/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-03 01:54:25,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-03 01:54:25,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-03 01:54:25,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-03 01:54:25,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-03 01:54:25,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-03 01:54:25,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-03 01:54:25,475 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-03 01:54:25,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-03 01:54:25,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-03 01:54:25,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-03 01:54:25,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-03 01:54:25,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-03 01:54:25,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-03 01:54:25,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-03 01:54:25,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-03 01:54:25,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-03 01:54:25,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-03 01:54:25,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-03 01:54:25,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-03 01:54:25,484 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-03 01:54:25,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-03 01:54:25,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-03 01:54:25,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-03 01:54:25,491 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-03 01:54:25,491 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-03 01:54:25,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-03 01:54:25,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-03 01:54:25,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-03 01:54:25,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-03 01:54:25,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-03 01:54:25,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-03 01:54:25,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-03 01:54:25,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-03 01:54:25,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-03 01:54:25,494 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-03 01:54:25,495 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-03 01:54:25,495 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-03 01:54:25,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-03 01:54:25,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-03 01:54:25,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-03 01:54:25,499 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 [2023-04-03 01:54:25,518 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-03 01:54:25,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-03 01:54:25,519 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-03 01:54:25,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-03 01:54:25,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-03 01:54:25,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-03 01:54:25,519 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-03 01:54:25,519 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-03 01:54:25,520 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-03 01:54:25,520 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-03 01:54:25,520 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-03 01:54:25,520 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-03 01:54:25,520 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-03 01:54:25,520 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-03 01:54:25,520 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-03 01:54:25,520 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-03 01:54:25,520 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-03 01:54:25,520 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-03 01:54:25,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-03 01:54:25,523 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-03 01:54:25,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-03 01:54:25,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-03 01:54:25,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-03 01:54:25,523 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-03 01:54:25,523 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-03 01:54:25,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-03 01:54:25,523 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-03 01:54:25,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-03 01:54:25,524 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-03 01:54:25,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-03 01:54:25,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-03 01:54:25,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-03 01:54:25,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:54:25,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-03 01:54:25,525 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-03 01:54:25,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-03 01:54:25,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-03 01:54:25,525 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-03 01:54:25,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-03 01:54:25,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-03 01:54:25,525 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-03 01:54:25,525 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-03 01:54:25,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-03 01:54:25,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-03 01:54:25,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-03 01:54:25,692 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-03 01:54:25,692 INFO L275 PluginConnector]: CDTParser initialized [2023-04-03 01:54:25,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c [2023-04-03 01:54:26,784 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-03 01:54:26,904 INFO L351 CDTParser]: Found 1 translation units. [2023-04-03 01:54:26,905 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c [2023-04-03 01:54:26,911 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16cec4ae0/0027dd2568d443f686e063049e120f7c/FLAG1a28a8317 [2023-04-03 01:54:26,922 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16cec4ae0/0027dd2568d443f686e063049e120f7c [2023-04-03 01:54:26,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-03 01:54:26,937 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-03 01:54:26,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-03 01:54:26,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-03 01:54:26,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-03 01:54:26,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:54:26" (1/1) ... [2023-04-03 01:54:26,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62af5bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:26, skipping insertion in model container [2023-04-03 01:54:26,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.04 01:54:26" (1/1) ... [2023-04-03 01:54:26,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-03 01:54:26,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-03 01:54:27,117 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/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c[20056,20069] [2023-04-03 01:54:27,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:54:27,126 INFO L203 MainTranslator]: Completed pre-run [2023-04-03 01:54:27,167 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/seq-mthreaded/pals_lcr.7.1.ufo.BOUNDED-14.pals.c[20056,20069] [2023-04-03 01:54:27,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-03 01:54:27,181 INFO L208 MainTranslator]: Completed translation [2023-04-03 01:54:27,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:27 WrapperNode [2023-04-03 01:54:27,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-03 01:54:27,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-03 01:54:27,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-03 01:54:27,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-03 01:54:27,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:27" (1/1) ... [2023-04-03 01:54:27,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:27" (1/1) ... [2023-04-03 01:54:27,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:27" (1/1) ... [2023-04-03 01:54:27,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:27" (1/1) ... [2023-04-03 01:54:27,203 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:27" (1/1) ... [2023-04-03 01:54:27,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:27" (1/1) ... [2023-04-03 01:54:27,210 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:27" (1/1) ... [2023-04-03 01:54:27,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:27" (1/1) ... [2023-04-03 01:54:27,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-03 01:54:27,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-03 01:54:27,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-03 01:54:27,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-03 01:54:27,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:27" (1/1) ... [2023-04-03 01:54:27,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-03 01:54:27,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:54:27,252 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) [2023-04-03 01:54:27,256 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 [2023-04-03 01:54:27,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-03 01:54:27,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-03 01:54:27,278 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-03 01:54:27,278 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-03 01:54:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-03 01:54:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-03 01:54:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-03 01:54:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-03 01:54:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-03 01:54:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure node6 [2023-04-03 01:54:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure node7 [2023-04-03 01:54:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-03 01:54:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-03 01:54:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-03 01:54:27,279 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-03 01:54:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-03 01:54:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-03 01:54:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-03 01:54:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-03 01:54:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-03 01:54:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-03 01:54:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-03 01:54:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-03 01:54:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-03 01:54:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-03 01:54:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-03 01:54:27,280 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-03 01:54:27,281 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-03 01:54:27,281 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-03 01:54:27,281 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-03 01:54:27,281 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-03 01:54:27,281 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2023-04-03 01:54:27,281 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-03 01:54:27,281 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-03 01:54:27,281 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-03 01:54:27,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-03 01:54:27,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-03 01:54:27,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-03 01:54:27,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-03 01:54:27,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-03 01:54:27,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-03 01:54:27,453 INFO L236 CfgBuilder]: Building ICFG [2023-04-03 01:54:27,455 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-03 01:54:27,850 INFO L277 CfgBuilder]: Performing block encoding [2023-04-03 01:54:28,282 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-03 01:54:28,282 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-03 01:54:28,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:54:28 BoogieIcfgContainer [2023-04-03 01:54:28,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-03 01:54:28,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-03 01:54:28,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-03 01:54:28,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-03 01:54:28,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.04 01:54:26" (1/3) ... [2023-04-03 01:54:28,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e062bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:54:28, skipping insertion in model container [2023-04-03 01:54:28,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.04 01:54:27" (2/3) ... [2023-04-03 01:54:28,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e062bc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.04 01:54:28, skipping insertion in model container [2023-04-03 01:54:28,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.04 01:54:28" (3/3) ... [2023-04-03 01:54:28,298 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals.c [2023-04-03 01:54:28,308 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-03 01:54:28,309 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-03 01:54:28,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-03 01:54:28,349 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;@1fb8df85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-03 01:54:28,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-03 01:54:28,352 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-03 01:54:28,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-03 01:54:28,357 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:28,358 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] [2023-04-03 01:54:28,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:28,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:28,363 INFO L85 PathProgramCache]: Analyzing trace with hash -378948662, now seen corresponding path program 1 times [2023-04-03 01:54:28,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:28,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253961115] [2023-04-03 01:54:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:28,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:54:32,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:32,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253961115] [2023-04-03 01:54:32,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253961115] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:54:32,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:54:32,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2023-04-03 01:54:32,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784339860] [2023-04-03 01:54:32,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:54:32,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-03 01:54:32,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:54:32,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-03 01:54:32,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2023-04-03 01:54:32,390 INFO L87 Difference]: Start difference. First operand has 56 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 13 states have call predecessors, (13), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 31 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-03 01:54:33,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:54:33,743 INFO L93 Difference]: Finished difference Result 145 states and 160 transitions. [2023-04-03 01:54:33,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-03 01:54:33,745 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 46 [2023-04-03 01:54:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:54:33,751 INFO L225 Difference]: With dead ends: 145 [2023-04-03 01:54:33,751 INFO L226 Difference]: Without dead ends: 93 [2023-04-03 01:54:33,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2023-04-03 01:54:33,756 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 544 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-03 01:54:33,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 185 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-03 01:54:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-04-03 01:54:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2023-04-03 01:54:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2023-04-03 01:54:33,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2023-04-03 01:54:33,795 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 46 [2023-04-03 01:54:33,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:54:33,795 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2023-04-03 01:54:33,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 16 states have internal predecessors, (22), 12 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-03 01:54:33,795 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2023-04-03 01:54:33,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 01:54:33,797 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:33,797 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, 1] [2023-04-03 01:54:33,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-03 01:54:33,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:33,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:33,798 INFO L85 PathProgramCache]: Analyzing trace with hash -415484803, now seen corresponding path program 1 times [2023-04-03 01:54:33,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:33,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585727993] [2023-04-03 01:54:33,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:33,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:33,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:54:34,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:34,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585727993] [2023-04-03 01:54:34,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585727993] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:54:34,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:54:34,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-03 01:54:34,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327692771] [2023-04-03 01:54:34,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:54:34,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-03 01:54:34,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:54:34,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-03 01:54:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-03 01:54:34,143 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-03 01:54:34,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:54:34,435 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2023-04-03 01:54:34,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-03 01:54:34,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 48 [2023-04-03 01:54:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:54:34,438 INFO L225 Difference]: With dead ends: 155 [2023-04-03 01:54:34,438 INFO L226 Difference]: Without dead ends: 113 [2023-04-03 01:54:34,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-04-03 01:54:34,443 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:54:34,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 123 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:54:34,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-03 01:54:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2023-04-03 01:54:34,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 42 states have (on average 1.119047619047619) internal successors, (47), 43 states have internal predecessors, (47), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-03 01:54:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2023-04-03 01:54:34,473 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 48 [2023-04-03 01:54:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:54:34,474 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2023-04-03 01:54:34,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2023-04-03 01:54:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2023-04-03 01:54:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-03 01:54:34,476 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:34,476 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, 1] [2023-04-03 01:54:34,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-03 01:54:34,476 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:34,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:34,476 INFO L85 PathProgramCache]: Analyzing trace with hash 2028068594, now seen corresponding path program 1 times [2023-04-03 01:54:34,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:34,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988971689] [2023-04-03 01:54:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:34,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:54:36,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:36,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988971689] [2023-04-03 01:54:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988971689] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:54:36,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:54:36,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2023-04-03 01:54:36,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933141490] [2023-04-03 01:54:36,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:54:36,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-04-03 01:54:36,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:54:36,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-04-03 01:54:36,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2023-04-03 01:54:36,997 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 30 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 11 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-03 01:54:38,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:54:38,488 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2023-04-03 01:54:38,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-04-03 01:54:38,489 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 11 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 48 [2023-04-03 01:54:38,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:54:38,490 INFO L225 Difference]: With dead ends: 155 [2023-04-03 01:54:38,490 INFO L226 Difference]: Without dead ends: 113 [2023-04-03 01:54:38,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=684, Invalid=2178, Unknown=0, NotChecked=0, Total=2862 [2023-04-03 01:54:38,492 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 598 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-03 01:54:38,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 175 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [324 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-03 01:54:38,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-04-03 01:54:38,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2023-04-03 01:54:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-04-03 01:54:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2023-04-03 01:54:38,524 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 48 [2023-04-03 01:54:38,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:54:38,526 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2023-04-03 01:54:38,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 11 states have call successors, (13), 9 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2023-04-03 01:54:38,526 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2023-04-03 01:54:38,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-04-03 01:54:38,527 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:38,527 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, 1, 1] [2023-04-03 01:54:38,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-03 01:54:38,527 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:38,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash -164262957, now seen corresponding path program 1 times [2023-04-03 01:54:38,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:38,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272647725] [2023-04-03 01:54:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:38,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-03 01:54:39,594 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:39,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272647725] [2023-04-03 01:54:39,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272647725] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-03 01:54:39,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-03 01:54:39,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-03 01:54:39,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717477452] [2023-04-03 01:54:39,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-03 01:54:39,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-03 01:54:39,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-03 01:54:39,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-03 01:54:39,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-03 01:54:39,595 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 13 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-03 01:54:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-03 01:54:39,861 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2023-04-03 01:54:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-03 01:54:39,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) Word has length 49 [2023-04-03 01:54:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-03 01:54:39,866 INFO L225 Difference]: With dead ends: 126 [2023-04-03 01:54:39,866 INFO L226 Difference]: Without dead ends: 124 [2023-04-03 01:54:39,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-04-03 01:54:39,873 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 39 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-03 01:54:39,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 660 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-03 01:54:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-04-03 01:54:39,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2023-04-03 01:54:39,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 22 states have call successors, (22), 22 states have call predecessors, (22), 22 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2023-04-03 01:54:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2023-04-03 01:54:39,913 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 49 [2023-04-03 01:54:39,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-03 01:54:39,913 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2023-04-03 01:54:39,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 3.125) internal successors, (25), 10 states have internal predecessors, (25), 3 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-03 01:54:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2023-04-03 01:54:39,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-03 01:54:39,919 INFO L187 NwaCegarLoop]: Found error trace [2023-04-03 01:54:39,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-03 01:54:39,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-03 01:54:39,920 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-03 01:54:39,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-03 01:54:39,920 INFO L85 PathProgramCache]: Analyzing trace with hash -817622488, now seen corresponding path program 1 times [2023-04-03 01:54:39,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-03 01:54:39,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109941221] [2023-04-03 01:54:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:39,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-03 01:54:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-03 01:54:55,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-03 01:54:55,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109941221] [2023-04-03 01:54:55,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109941221] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-03 01:54:55,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741707143] [2023-04-03 01:54:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-03 01:54:55,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-03 01:54:55,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-03 01:54:55,205 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) [2023-04-03 01:54:55,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-03 01:54:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-03 01:54:55,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 233 conjunts are in the unsatisfiable core [2023-04-03 01:54:55,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-03 01:55:52,609 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-04-03 01:56:19,828 WARN L223 SmtUtils]: Spent 26.66s on a formula simplification. DAG size of input: 235 DAG size of output: 192 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-04-03 01:56:53,458 WARN L223 SmtUtils]: Spent 10.99s on a formula simplification that was a NOOP. DAG size: 276 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)