/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 EqDomain -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 12:25:20,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 12:25:20,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 12:25:20,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 12:25:20,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 12:25:20,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 12:25:20,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 12:25:20,552 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 12:25:20,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 12:25:20,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 12:25:20,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 12:25:20,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 12:25:20,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 12:25:20,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 12:25:20,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 12:25:20,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 12:25:20,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 12:25:20,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 12:25:20,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 12:25:20,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 12:25:20,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 12:25:20,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 12:25:20,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 12:25:20,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 12:25:20,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 12:25:20,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 12:25:20,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 12:25:20,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 12:25:20,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 12:25:20,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 12:25:20,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 12:25:20,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 12:25:20,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 12:25:20,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 12:25:20,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 12:25:20,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 12:25:20,585 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 12:25:20,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 12:25:20,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 12:25:20,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 12:25:20,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 12:25:20,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 12:25:20,614 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 12:25:20,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 12:25:20,614 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 12:25:20,614 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 12:25:20,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 12:25:20,615 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 12:25:20,615 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 12:25:20,615 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 12:25:20,615 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 12:25:20,615 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 12:25:20,616 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 12:25:20,616 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 12:25:20,616 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 12:25:20,616 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 12:25:20,617 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 12:25:20,617 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 12:25:20,617 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 12:25:20,617 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 12:25:20,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 12:25:20,618 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 12:25:20,618 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 12:25:20,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 12:25:20,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 12:25:20,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 12:25:20,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 12:25:20,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 12:25:20,618 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 12:25:20,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 12:25:20,619 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 12:25:20,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 12:25:20,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 12:25:20,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 12:25:20,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:25:20,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 12:25:20,619 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 12:25:20,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 12:25:20,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 12:25:20,620 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 12:25:20,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 12:25:20,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 12:25:20,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 12:25:20,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 12:25:20,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 12:25:20,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 12:25:20,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 12:25:20,821 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 12:25:20,821 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 12:25:20,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c [2023-04-01 12:25:21,889 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 12:25:22,044 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 12:25:22,044 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.6.ufo.BOUNDED-12.pals.c [2023-04-01 12:25:22,050 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/240f29675/9c943b5756ab4dbf9f8d3f69b564b2ec/FLAGcd4015a73 [2023-04-01 12:25:22,062 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/240f29675/9c943b5756ab4dbf9f8d3f69b564b2ec [2023-04-01 12:25:22,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 12:25:22,065 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 12:25:22,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 12:25:22,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 12:25:22,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 12:25:22,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:25:22" (1/1) ... [2023-04-01 12:25:22,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c674e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:22, skipping insertion in model container [2023-04-01 12:25:22,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 12:25:22" (1/1) ... [2023-04-01 12:25:22,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 12:25:22,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 12:25:22,238 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.6.ufo.BOUNDED-12.pals.c[15075,15088] [2023-04-01 12:25:22,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:25:22,248 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 12:25:22,286 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.6.ufo.BOUNDED-12.pals.c[15075,15088] [2023-04-01 12:25:22,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 12:25:22,308 INFO L208 MainTranslator]: Completed translation [2023-04-01 12:25:22,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:22 WrapperNode [2023-04-01 12:25:22,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 12:25:22,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 12:25:22,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 12:25:22,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 12:25:22,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:22" (1/1) ... [2023-04-01 12:25:22,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:22" (1/1) ... [2023-04-01 12:25:22,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:22" (1/1) ... [2023-04-01 12:25:22,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:22" (1/1) ... [2023-04-01 12:25:22,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:22" (1/1) ... [2023-04-01 12:25:22,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:22" (1/1) ... [2023-04-01 12:25:22,341 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:22" (1/1) ... [2023-04-01 12:25:22,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:22" (1/1) ... [2023-04-01 12:25:22,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 12:25:22,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 12:25:22,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 12:25:22,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 12:25:22,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:22" (1/1) ... [2023-04-01 12:25:22,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 12:25:22,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:25:22,366 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 12:25:22,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 12:25:22,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 12:25:22,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 12:25:22,414 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 12:25:22,414 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 12:25:22,414 INFO L138 BoogieDeclarations]: Found implementation of procedure node1 [2023-04-01 12:25:22,414 INFO L138 BoogieDeclarations]: Found implementation of procedure node2 [2023-04-01 12:25:22,414 INFO L138 BoogieDeclarations]: Found implementation of procedure node3 [2023-04-01 12:25:22,415 INFO L138 BoogieDeclarations]: Found implementation of procedure node4 [2023-04-01 12:25:22,415 INFO L138 BoogieDeclarations]: Found implementation of procedure node5 [2023-04-01 12:25:22,415 INFO L138 BoogieDeclarations]: Found implementation of procedure node6 [2023-04-01 12:25:22,415 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2023-04-01 12:25:22,415 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-01 12:25:22,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 12:25:22,415 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-04-01 12:25:22,415 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 12:25:22,415 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 12:25:22,415 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 12:25:22,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 12:25:22,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-01 12:25:22,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 12:25:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 12:25:22,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 12:25:22,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 12:25:22,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 12:25:22,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 12:25:22,507 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 12:25:22,509 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 12:25:22,816 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 12:25:23,176 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 12:25:23,177 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 12:25:23,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:25:23 BoogieIcfgContainer [2023-04-01 12:25:23,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 12:25:23,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 12:25:23,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 12:25:23,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 12:25:23,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 12:25:22" (1/3) ... [2023-04-01 12:25:23,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c34897b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:25:23, skipping insertion in model container [2023-04-01 12:25:23,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 12:25:22" (2/3) ... [2023-04-01 12:25:23,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c34897b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 12:25:23, skipping insertion in model container [2023-04-01 12:25:23,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 12:25:23" (3/3) ... [2023-04-01 12:25:23,187 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c [2023-04-01 12:25:23,199 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 12:25:23,199 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 12:25:23,239 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 12:25:23,243 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;@69a92aac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 12:25:23,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 12:25:23,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-04-01 12:25:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 12:25:23,251 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:25:23,252 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] [2023-04-01 12:25:23,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:25:23,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:25:23,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1225992123, now seen corresponding path program 1 times [2023-04-01 12:25:23,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:25:23,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693244664] [2023-04-01 12:25:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:25:23,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:25:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:25:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:25:26,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:25:26,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693244664] [2023-04-01 12:25:26,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693244664] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:25:26,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:25:26,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-04-01 12:25:26,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661738776] [2023-04-01 12:25:26,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:25:26,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 12:25:26,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:25:26,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 12:25:26,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2023-04-01 12:25:26,347 INFO L87 Difference]: Start difference. First operand has 53 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 12 states have call successors, (12), 12 states have call predecessors, (12), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 12:25:27,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:25:27,508 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2023-04-01 12:25:27,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 12:25:27,510 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 43 [2023-04-01 12:25:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:25:27,515 INFO L225 Difference]: With dead ends: 136 [2023-04-01 12:25:27,515 INFO L226 Difference]: Without dead ends: 87 [2023-04-01 12:25:27,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=495, Invalid=2157, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 12:25:27,519 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 482 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:25:27,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 174 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 12:25:27,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-04-01 12:25:27,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2023-04-01 12:25:27,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2023-04-01 12:25:27,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2023-04-01 12:25:27,552 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 43 [2023-04-01 12:25:27,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:25:27,553 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2023-04-01 12:25:27,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 12:25:27,553 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2023-04-01 12:25:27,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 12:25:27,554 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:25:27,554 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] [2023-04-01 12:25:27,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 12:25:27,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:25:27,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:25:27,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1043507363, now seen corresponding path program 1 times [2023-04-01 12:25:27,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:25:27,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966527776] [2023-04-01 12:25:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:25:27,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:25:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:25:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:25:27,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:25:27,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966527776] [2023-04-01 12:25:27,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966527776] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:25:27,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:25:27,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-04-01 12:25:27,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364225318] [2023-04-01 12:25:27,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:25:27,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 12:25:27,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:25:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 12:25:27,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-04-01 12:25:27,848 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 12:25:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:25:28,137 INFO L93 Difference]: Finished difference Result 146 states and 157 transitions. [2023-04-01 12:25:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 12:25:28,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 45 [2023-04-01 12:25:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:25:28,140 INFO L225 Difference]: With dead ends: 146 [2023-04-01 12:25:28,140 INFO L226 Difference]: Without dead ends: 107 [2023-04-01 12:25:28,143 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 [2023-04-01 12:25:28,145 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 119 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 12:25:28,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 105 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 12:25:28,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-01 12:25:28,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2023-04-01 12:25:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.125) internal successors, (45), 41 states have internal predecessors, (45), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 12:25:28,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2023-04-01 12:25:28,170 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 45 [2023-04-01 12:25:28,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:25:28,170 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2023-04-01 12:25:28,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2023-04-01 12:25:28,170 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2023-04-01 12:25:28,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 12:25:28,172 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:25:28,172 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] [2023-04-01 12:25:28,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 12:25:28,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:25:28,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:25:28,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1459518989, now seen corresponding path program 1 times [2023-04-01 12:25:28,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:25:28,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638102430] [2023-04-01 12:25:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:25:28,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:25:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:25:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:25:30,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:25:30,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638102430] [2023-04-01 12:25:30,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638102430] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:25:30,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:25:30,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2023-04-01 12:25:30,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716647229] [2023-04-01 12:25:30,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:25:30,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 12:25:30,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:25:30,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 12:25:30,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2023-04-01 12:25:30,608 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 28 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 12:25:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:25:32,146 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2023-04-01 12:25:32,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-04-01 12:25:32,147 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 45 [2023-04-01 12:25:32,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:25:32,148 INFO L225 Difference]: With dead ends: 146 [2023-04-01 12:25:32,148 INFO L226 Difference]: Without dead ends: 107 [2023-04-01 12:25:32,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=662, Invalid=2760, Unknown=0, NotChecked=0, Total=3422 [2023-04-01 12:25:32,150 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 495 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 12:25:32,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 154 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 12:25:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-01 12:25:32,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2023-04-01 12:25:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 12:25:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2023-04-01 12:25:32,179 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 45 [2023-04-01 12:25:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:25:32,180 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2023-04-01 12:25:32,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 11 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 12:25:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2023-04-01 12:25:32,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 12:25:32,182 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:25:32,182 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] [2023-04-01 12:25:32,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 12:25:32,182 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:25:32,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:25:32,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1555572408, now seen corresponding path program 1 times [2023-04-01 12:25:32,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:25:32,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288068405] [2023-04-01 12:25:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:25:32,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:25:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:25:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 12:25:32,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:25:32,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288068405] [2023-04-01 12:25:32,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288068405] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 12:25:32,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 12:25:32,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-04-01 12:25:32,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343225896] [2023-04-01 12:25:32,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 12:25:32,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 12:25:32,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 12:25:32,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 12:25:32,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2023-04-01 12:25:32,982 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 12:25:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 12:25:33,198 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2023-04-01 12:25:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 12:25:33,198 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 46 [2023-04-01 12:25:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 12:25:33,200 INFO L225 Difference]: With dead ends: 119 [2023-04-01 12:25:33,200 INFO L226 Difference]: Without dead ends: 117 [2023-04-01 12:25:33,201 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 [2023-04-01 12:25:33,201 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 39 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 12:25:33,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 614 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 12:25:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-04-01 12:25:33,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2023-04-01 12:25:33,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 20 states have call successors, (20), 20 states have call predecessors, (20), 20 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2023-04-01 12:25:33,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2023-04-01 12:25:33,238 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 46 [2023-04-01 12:25:33,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 12:25:33,238 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2023-04-01 12:25:33,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 3.0) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-04-01 12:25:33,238 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2023-04-01 12:25:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 12:25:33,243 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 12:25:33,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 12:25:33,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 12:25:33,244 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 12:25:33,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 12:25:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash -482165746, now seen corresponding path program 1 times [2023-04-01 12:25:33,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 12:25:33,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348229192] [2023-04-01 12:25:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:25:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 12:25:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:25:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 12:25:44,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 12:25:44,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348229192] [2023-04-01 12:25:44,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348229192] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 12:25:44,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550882542] [2023-04-01 12:25:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 12:25:44,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 12:25:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 12:25:44,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 12:25:44,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 12:25:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 12:25:44,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 235 conjunts are in the unsatisfiable core [2023-04-01 12:25:44,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 12:26:23,622 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts.