/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/nla-digbench-scaling/sqrt1-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:33:33,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:33:33,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:33:33,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:33:33,597 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:33:33,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:33:33,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:33:33,605 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:33:33,606 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:33:33,610 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:33:33,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:33:33,613 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:33:33,613 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:33:33,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:33:33,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:33:33,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:33:33,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:33:33,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:33:33,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:33:33,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:33:33,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:33:33,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:33:33,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:33:33,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:33:33,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:33:33,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:33:33,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:33:33,637 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:33:33,638 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:33:33,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:33:33,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:33:33,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:33:33,639 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:33:33,640 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:33:33,641 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:33:33,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:33:33,641 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:33:33,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:33:33,642 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:33:33,642 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:33:33,643 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:33:33,646 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 [2023-04-02 23:33:33,674 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:33:33,674 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:33:33,675 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:33:33,675 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:33:33,675 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:33:33,676 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:33:33,676 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:33:33,676 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:33:33,676 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:33:33,676 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:33:33,677 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:33:33,677 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:33:33,677 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:33:33,677 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:33:33,677 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:33:33,678 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:33:33,678 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:33:33,678 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:33:33,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:33:33,678 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:33:33,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:33:33,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:33:33,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:33:33,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:33:33,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:33:33,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:33:33,679 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:33:33,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:33:33,679 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:33:33,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:33:33,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:33:33,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:33:33,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:33:33,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:33:33,680 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:33:33,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:33:33,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:33:33,681 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:33:33,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:33:33,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:33:33,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:33:33,681 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:33:33,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:33:33,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:33:33,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:33:33,899 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:33:33,899 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:33:33,900 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2023-04-02 23:33:35,030 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:33:35,223 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:33:35,223 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2023-04-02 23:33:35,229 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f10034112/7ee4a740696349aabb49c9db8d2020bf/FLAG7da8560f0 [2023-04-02 23:33:35,242 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f10034112/7ee4a740696349aabb49c9db8d2020bf [2023-04-02 23:33:35,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:33:35,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:33:35,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:33:35,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:33:35,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:33:35,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:33:35" (1/1) ... [2023-04-02 23:33:35,254 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2534fb75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:35, skipping insertion in model container [2023-04-02 23:33:35,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:33:35" (1/1) ... [2023-04-02 23:33:35,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:33:35,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:33:35,422 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/nla-digbench-scaling/sqrt1-ll_unwindbound10.c[520,533] [2023-04-02 23:33:35,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:33:35,446 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:33:35,458 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/nla-digbench-scaling/sqrt1-ll_unwindbound10.c[520,533] [2023-04-02 23:33:35,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:33:35,475 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:33:35,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:35 WrapperNode [2023-04-02 23:33:35,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:33:35,476 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:33:35,476 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:33:35,476 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:33:35,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:35" (1/1) ... [2023-04-02 23:33:35,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:35" (1/1) ... [2023-04-02 23:33:35,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:35" (1/1) ... [2023-04-02 23:33:35,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:35" (1/1) ... [2023-04-02 23:33:35,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:35" (1/1) ... [2023-04-02 23:33:35,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:35" (1/1) ... [2023-04-02 23:33:35,494 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:35" (1/1) ... [2023-04-02 23:33:35,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:35" (1/1) ... [2023-04-02 23:33:35,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:33:35,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:33:35,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:33:35,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:33:35,498 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:35" (1/1) ... [2023-04-02 23:33:35,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:33:35,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:35,524 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) [2023-04-02 23:33:35,551 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 [2023-04-02 23:33:35,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:33:35,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:33:35,563 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:33:35,563 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 23:33:35,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 23:33:35,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:33:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:33:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:33:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:33:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:33:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:33:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 23:33:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 23:33:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:33:35,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:33:35,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:33:35,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:33:35,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:33:35,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:33:35,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:33:35,631 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:33:35,633 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:33:35,799 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:33:35,831 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:33:35,831 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 23:33:35,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:33:35 BoogieIcfgContainer [2023-04-02 23:33:35,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:33:35,851 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:33:35,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:33:35,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:33:35,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:33:35" (1/3) ... [2023-04-02 23:33:35,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec0ed54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:33:35, skipping insertion in model container [2023-04-02 23:33:35,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:33:35" (2/3) ... [2023-04-02 23:33:35,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec0ed54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:33:35, skipping insertion in model container [2023-04-02 23:33:35,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:33:35" (3/3) ... [2023-04-02 23:33:35,856 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound10.c [2023-04-02 23:33:35,887 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:33:35,887 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:33:35,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:33:35,969 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;@6c5b3b30, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:33:35,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:33:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 23:33:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-02 23:33:35,980 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:35,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:35,981 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:35,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:35,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1839658221, now seen corresponding path program 1 times [2023-04-02 23:33:35,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:35,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808742253] [2023-04-02 23:33:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:35,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:33:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:33:36,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:36,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808742253] [2023-04-02 23:33:36,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808742253] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:33:36,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:33:36,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:33:36,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386899841] [2023-04-02 23:33:36,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:33:36,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:33:36,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:36,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:33:36,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:33:36,158 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 23:33:36,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:36,179 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2023-04-02 23:33:36,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:33:36,181 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-02 23:33:36,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:36,187 INFO L225 Difference]: With dead ends: 43 [2023-04-02 23:33:36,187 INFO L226 Difference]: Without dead ends: 20 [2023-04-02 23:33:36,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:33:36,192 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:36,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:33:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-02 23:33:36,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-02 23:33:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 23:33:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-04-02 23:33:36,224 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2023-04-02 23:33:36,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:36,224 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-04-02 23:33:36,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 23:33:36,226 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-04-02 23:33:36,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 23:33:36,228 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:36,228 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:36,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 23:33:36,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:36,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash 728031926, now seen corresponding path program 1 times [2023-04-02 23:33:36,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:36,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891487712] [2023-04-02 23:33:36,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:36,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:33:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:33:36,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:36,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891487712] [2023-04-02 23:33:36,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891487712] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:33:36,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:33:36,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:33:36,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205296457] [2023-04-02 23:33:36,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:33:36,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:33:36,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:36,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:33:36,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:33:36,412 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 23:33:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:36,431 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2023-04-02 23:33:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:33:36,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 23:33:36,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:36,432 INFO L225 Difference]: With dead ends: 31 [2023-04-02 23:33:36,433 INFO L226 Difference]: Without dead ends: 22 [2023-04-02 23:33:36,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:33:36,434 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:36,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:33:36,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-02 23:33:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-04-02 23:33:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 23:33:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-04-02 23:33:36,441 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2023-04-02 23:33:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:36,441 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-04-02 23:33:36,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 23:33:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-04-02 23:33:36,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 23:33:36,442 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:36,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:36,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 23:33:36,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:36,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:36,443 INFO L85 PathProgramCache]: Analyzing trace with hash 729700222, now seen corresponding path program 1 times [2023-04-02 23:33:36,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:36,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390444573] [2023-04-02 23:33:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:36,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:33:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:33:36,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:36,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390444573] [2023-04-02 23:33:36,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390444573] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:33:36,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:33:36,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:33:36,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597418035] [2023-04-02 23:33:36,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:33:36,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:33:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:36,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:33:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:33:36,567 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 23:33:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:36,646 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2023-04-02 23:33:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:33:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-02 23:33:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:36,649 INFO L225 Difference]: With dead ends: 35 [2023-04-02 23:33:36,649 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 23:33:36,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 23:33:36,656 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:36,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 67 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:33:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 23:33:36,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2023-04-02 23:33:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-02 23:33:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2023-04-02 23:33:36,666 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 11 [2023-04-02 23:33:36,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:36,666 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2023-04-02 23:33:36,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 23:33:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2023-04-02 23:33:36,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 23:33:36,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:36,667 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:36,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 23:33:36,667 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:36,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1275288691, now seen corresponding path program 1 times [2023-04-02 23:33:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:36,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623456615] [2023-04-02 23:33:36,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:36,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:36,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:36,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854157321] [2023-04-02 23:33:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:36,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:36,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:36,683 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) [2023-04-02 23:33:36,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 23:33:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:33:36,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 23:33:36,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:33:36,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:33:37,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:37,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623456615] [2023-04-02 23:33:37,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:37,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854157321] [2023-04-02 23:33:37,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854157321] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:33:37,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1062584881] [2023-04-02 23:33:37,071 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 23:33:37,071 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:33:37,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:33:37,078 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:33:37,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:33:37,166 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:33:37,277 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-04-02 23:33:37,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:33:37,293 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:33:37,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1062584881] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:33:37,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:33:37,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 7] total 21 [2023-04-02 23:33:37,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451451573] [2023-04-02 23:33:37,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:33:37,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 23:33:37,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:37,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 23:33:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2023-04-02 23:33:37,528 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 11 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 23:33:37,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:37,946 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-04-02 23:33:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:33:37,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-04-02 23:33:37,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:37,948 INFO L225 Difference]: With dead ends: 39 [2023-04-02 23:33:37,948 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 23:33:37,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2023-04-02 23:33:37,949 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:37,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 30 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 23:33:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 23:33:37,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-04-02 23:33:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 23:33:37,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2023-04-02 23:33:37,959 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 16 [2023-04-02 23:33:37,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:37,959 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2023-04-02 23:33:37,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 23:33:37,959 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2023-04-02 23:33:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 23:33:37,960 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:37,960 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:37,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 23:33:38,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:38,167 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:38,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:38,167 INFO L85 PathProgramCache]: Analyzing trace with hash 9041524, now seen corresponding path program 1 times [2023-04-02 23:33:38,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:38,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138204706] [2023-04-02 23:33:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:38,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:38,187 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:38,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1392193109] [2023-04-02 23:33:38,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:38,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:38,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:38,189 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:33:38,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 23:33:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:33:38,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 23:33:38,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:33:38,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:33:38,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:38,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138204706] [2023-04-02 23:33:38,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:38,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392193109] [2023-04-02 23:33:38,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392193109] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:33:38,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [38543586] [2023-04-02 23:33:38,350 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-02 23:33:38,351 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:33:38,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:33:38,351 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:33:38,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:33:38,390 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:33:39,752 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:33:39,755 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:33:39,759 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:33:40,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '735#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:33:40,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:33:40,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:33:40,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-04-02 23:33:40,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329814911] [2023-04-02 23:33:40,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:33:40,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 23:33:40,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:40,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 23:33:40,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2023-04-02 23:33:40,385 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 23:33:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:40,487 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2023-04-02 23:33:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:33:40,488 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 29 [2023-04-02 23:33:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:40,490 INFO L225 Difference]: With dead ends: 75 [2023-04-02 23:33:40,490 INFO L226 Difference]: Without dead ends: 66 [2023-04-02 23:33:40,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-04-02 23:33:40,491 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:40,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 107 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:33:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-04-02 23:33:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2023-04-02 23:33:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-02 23:33:40,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2023-04-02 23:33:40,507 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 29 [2023-04-02 23:33:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:40,507 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2023-04-02 23:33:40,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2023-04-02 23:33:40,507 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2023-04-02 23:33:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-02 23:33:40,508 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:40,508 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:40,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-02 23:33:40,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:40,709 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:40,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:40,709 INFO L85 PathProgramCache]: Analyzing trace with hash 10709820, now seen corresponding path program 1 times [2023-04-02 23:33:40,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:40,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333333614] [2023-04-02 23:33:40,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:40,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:40,726 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:40,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021889896] [2023-04-02 23:33:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:40,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:40,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:40,733 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:33:40,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 23:33:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:33:40,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 23:33:40,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-02 23:33:40,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 23:33:40,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:40,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333333614] [2023-04-02 23:33:40,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:40,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021889896] [2023-04-02 23:33:40,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021889896] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-02 23:33:40,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-02 23:33:40,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2023-04-02 23:33:40,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705271134] [2023-04-02 23:33:40,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:33:40,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:33:40,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:40,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:33:40,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-04-02 23:33:40,871 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 23:33:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:40,910 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2023-04-02 23:33:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:33:40,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-04-02 23:33:40,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:40,912 INFO L225 Difference]: With dead ends: 76 [2023-04-02 23:33:40,912 INFO L226 Difference]: Without dead ends: 74 [2023-04-02 23:33:40,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-02 23:33:40,913 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:40,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 53 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:33:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-04-02 23:33:40,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-04-02 23:33:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.170731707317073) internal successors, (48), 44 states have internal predecessors, (48), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-02 23:33:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2023-04-02 23:33:40,925 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 29 [2023-04-02 23:33:40,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:40,925 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2023-04-02 23:33:40,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-02 23:33:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2023-04-02 23:33:40,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-02 23:33:40,926 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:40,926 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:40,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 23:33:41,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:41,137 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:41,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:41,137 INFO L85 PathProgramCache]: Analyzing trace with hash -29084017, now seen corresponding path program 2 times [2023-04-02 23:33:41,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:41,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189185584] [2023-04-02 23:33:41,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:41,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:41,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:41,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545535172] [2023-04-02 23:33:41,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 23:33:41,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:41,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:41,153 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:33:41,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 23:33:41,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-02 23:33:41,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:33:41,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-02 23:33:41,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-02 23:33:41,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-02 23:33:41,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189185584] [2023-04-02 23:33:41,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:41,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545535172] [2023-04-02 23:33:41,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545535172] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:33:41,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1916024083] [2023-04-02 23:33:41,415 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 23:33:41,415 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:33:41,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:33:41,416 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:33:41,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:33:41,432 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:33:42,512 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:33:42,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:33:42,518 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:33:43,108 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1586#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:33:43,108 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:33:43,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:33:43,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-04-02 23:33:43,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719638953] [2023-04-02 23:33:43,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:33:43,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 23:33:43,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:43,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 23:33:43,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2023-04-02 23:33:43,109 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-02 23:33:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:43,277 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2023-04-02 23:33:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 23:33:43,279 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 34 [2023-04-02 23:33:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:43,284 INFO L225 Difference]: With dead ends: 85 [2023-04-02 23:33:43,284 INFO L226 Difference]: Without dead ends: 80 [2023-04-02 23:33:43,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2023-04-02 23:33:43,286 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:43,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 83 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 23:33:43,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-04-02 23:33:43,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2023-04-02 23:33:43,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-02 23:33:43,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2023-04-02 23:33:43,315 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 34 [2023-04-02 23:33:43,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:43,317 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2023-04-02 23:33:43,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-04-02 23:33:43,317 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2023-04-02 23:33:43,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-04-02 23:33:43,320 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:33:43,320 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:33:43,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 23:33:43,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:43,526 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:33:43,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:33:43,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1829751194, now seen corresponding path program 3 times [2023-04-02 23:33:43,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:33:43,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224414027] [2023-04-02 23:33:43,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:33:43,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:33:43,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:33:43,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081418472] [2023-04-02 23:33:43,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 23:33:43,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:43,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:33:43,535 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 23:33:43,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 23:33:43,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 23:33:43,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 23:33:43,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-02 23:33:43,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:33:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 55 proven. 22 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-04-02 23:33:43,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:33:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-04-02 23:33:48,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:33:48,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224414027] [2023-04-02 23:33:48,553 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:33:48,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081418472] [2023-04-02 23:33:48,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081418472] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:33:48,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [516840677] [2023-04-02 23:33:48,555 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-02 23:33:48,555 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:33:48,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:33:48,555 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:33:48,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:33:48,572 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:33:49,627 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-04-02 23:33:49,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:33:49,633 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:33:50,371 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2195#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-04-02 23:33:50,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:33:50,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:33:50,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-04-02 23:33:50,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454900503] [2023-04-02 23:33:50,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:33:50,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-02 23:33:50,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:33:50,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-02 23:33:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=527, Unknown=1, NotChecked=0, Total=600 [2023-04-02 23:33:50,373 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 15 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 8 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-02 23:33:53,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 23:33:53,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:33:53,110 INFO L93 Difference]: Finished difference Result 79 states and 89 transitions. [2023-04-02 23:33:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:33:53,110 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 8 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 57 [2023-04-02 23:33:53,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:33:53,111 INFO L225 Difference]: With dead ends: 79 [2023-04-02 23:33:53,111 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 23:33:53,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=81, Invalid=568, Unknown=1, NotChecked=0, Total=650 [2023-04-02 23:33:53,112 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-04-02 23:33:53,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 54 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-04-02 23:33:53,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 23:33:53,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 23:33:53,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-02 23:33:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 23:33:53,113 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2023-04-02 23:33:53,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:33:53,114 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 23:33:53,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 8 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2023-04-02 23:33:53,114 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 23:33:53,114 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 23:33:53,116 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 23:33:53,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 23:33:53,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:33:53,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 23:33:53,932 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2023-04-02 23:33:53,932 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 5) no Hoare annotation was computed. [2023-04-02 23:33:53,932 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(lines 8 10) no Hoare annotation was computed. [2023-04-02 23:33:53,932 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2023-04-02 23:33:53,932 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2023-04-02 23:33:53,932 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))) (let ((.cse1 (* main_~a~0 2))) (and (= (+ .cse1 main_~s~0 1) (+ (* main_~t~0 2) (* main_~a~0 main_~a~0))) (= main_~t~0 (+ .cse1 1)))))) [2023-04-02 23:33:53,933 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))) (let ((.cse1 (* main_~a~0 2))) (and (= (+ .cse1 main_~s~0 1) (+ (* main_~t~0 2) (* main_~a~0 main_~a~0))) (= main_~t~0 (+ .cse1 1)))))) [2023-04-02 23:33:53,933 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 21 49) no Hoare annotation was computed. [2023-04-02 23:33:53,933 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2023-04-02 23:33:53,933 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))) (let ((.cse1 (* main_~a~0 2))) (and (= (+ .cse1 main_~s~0 1) (+ (* main_~t~0 2) (* main_~a~0 main_~a~0))) (= main_~t~0 (+ .cse1 1)))))) [2023-04-02 23:33:53,933 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 21 49) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (= ~counter~0 0) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))))) [2023-04-02 23:33:53,933 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))) (let ((.cse1 (* main_~a~0 2))) (and (= (+ .cse1 main_~s~0 1) (+ (* main_~t~0 2) (* main_~a~0 main_~a~0))) (= main_~t~0 (+ .cse1 1)))))) [2023-04-02 23:33:53,933 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2023-04-02 23:33:53,934 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))) (let ((.cse1 (* main_~a~0 2))) (and (= (+ .cse1 main_~s~0 1) (+ (* main_~t~0 2) (* main_~a~0 main_~a~0))) (= main_~t~0 (+ .cse1 1)))))) [2023-04-02 23:33:53,934 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))) (let ((.cse1 (* main_~a~0 2))) (and (= (+ .cse1 main_~s~0 1) (+ (* main_~t~0 2) (* main_~a~0 main_~a~0))) (= main_~t~0 (+ .cse1 1)))))) [2023-04-02 23:33:53,934 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (or (not (= (select .cse0 0) 48)) (not (= |#NULL.offset| 0)) (not (= 2 (select |#length| 1))) (not (= (select |#valid| 3) 1)) (not (= (select |#length| 3) 12)) (not (= (select |#valid| 0) 0)) (not (= (select .cse0 1) 0)) (not (= (select |#valid| 1) 1)) (not (= |#NULL.base| 0)) (not (= |old(~counter~0)| 0)) (not (= (select |#valid| 2) 1)) (<= |#StackHeapBarrier| 0) (not (= 11 (select |#length| 2))) (let ((.cse1 (* main_~a~0 2))) (and (= (+ .cse1 main_~s~0 1) (+ (* main_~t~0 2) (* main_~a~0 main_~a~0))) (= main_~t~0 (+ .cse1 1)))))) [2023-04-02 23:33:53,934 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2023-04-02 23:33:53,934 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 23:33:53,934 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 23:33:53,934 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (let ((.cse0 (select |#memory_int| 1))) (and (= (select |#length| 3) 12) (= 11 (select |#length| 2)) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= ~counter~0 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select .cse0 0) 48) (= (select .cse0 1) 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))) [2023-04-02 23:33:53,934 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 23:33:53,934 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 23:33:53,934 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2023-04-02 23:33:53,935 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2023-04-02 23:33:53,935 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2023-04-02 23:33:53,935 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2023-04-02 23:33:53,935 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 17) the Hoare annotation is: true [2023-04-02 23:33:53,935 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2023-04-02 23:33:53,937 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-04-02 23:33:53,939 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 23:33:53,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 11:33:53 BoogieIcfgContainer [2023-04-02 23:33:53,951 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 23:33:53,952 INFO L158 Benchmark]: Toolchain (without parser) took 18705.34ms. Allocated memory was 183.5MB in the beginning and 323.0MB in the end (delta: 139.5MB). Free memory was 135.2MB in the beginning and 144.0MB in the end (delta: -8.8MB). Peak memory consumption was 131.9MB. Max. memory is 8.0GB. [2023-04-02 23:33:53,952 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 183.5MB. Free memory is still 132.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 23:33:53,952 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.46ms. Allocated memory is still 183.5MB. Free memory was 135.2MB in the beginning and 124.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 23:33:53,952 INFO L158 Benchmark]: Boogie Preprocessor took 20.31ms. Allocated memory is still 183.5MB. Free memory was 124.7MB in the beginning and 123.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 23:33:53,952 INFO L158 Benchmark]: RCFGBuilder took 352.71ms. Allocated memory is still 183.5MB. Free memory was 123.4MB in the beginning and 111.1MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-04-02 23:33:53,953 INFO L158 Benchmark]: TraceAbstraction took 18099.72ms. Allocated memory was 183.5MB in the beginning and 323.0MB in the end (delta: 139.5MB). Free memory was 110.4MB in the beginning and 144.0MB in the end (delta: -33.6MB). Peak memory consumption was 106.8MB. Max. memory is 8.0GB. [2023-04-02 23:33:53,954 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 183.5MB. Free memory is still 132.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 226.46ms. Allocated memory is still 183.5MB. Free memory was 135.2MB in the beginning and 124.7MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.31ms. Allocated memory is still 183.5MB. Free memory was 124.7MB in the beginning and 123.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 352.71ms. Allocated memory is still 183.5MB. Free memory was 123.4MB in the beginning and 111.1MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 18099.72ms. Allocated memory was 183.5MB in the beginning and 323.0MB in the end (delta: 139.5MB). Free memory was 110.4MB in the beginning and 144.0MB in the end (delta: -33.6MB). Peak memory consumption was 106.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 18.0s, OverallIterations: 8, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 126 SdHoareTripleChecker+Valid, 3.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 101 mSDsluCounter, 487 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 323 mSDsCounter, 55 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 592 IncrementalHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 55 mSolverCounterUnsat, 164 mSDtfsCounter, 592 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 485 GetRequests, 380 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=7, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 47 PreInvPairs, 76 NumberOfFragments, 823 HoareAnnotationTreeSize, 47 FomulaSimplifications, 311 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 1029 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 197 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 349 ConstructedInterpolants, 0 QuantifiedInterpolants, 1232 SizeOfPredicates, 14 NumberOfNonLiveVariables, 528 ConjunctsInSsa, 94 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 407/446 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 14, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 12, TOOLS_POST_TIME: 0.0s, TOOLS_POST_CALL_APPLICATIONS: 8, TOOLS_POST_CALL_TIME: 0.1s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 24, TOOLS_QUANTIFIERELIM_TIME: 0.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 41, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 5, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 14, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 80, DAG_COMPRESSION_RETAINED_NODES: 49, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((((((((((((!(unknown-#memory_int-unknown[1][0] == 48) || !(#NULL == 0)) || !(2 == unknown-#length-unknown[1])) || !(\valid[3] == 1)) || !(unknown-#length-unknown[3] == 12)) || !(\valid[0] == 0)) || !(unknown-#memory_int-unknown[1][1] == 0)) || !(\valid[1] == 1)) || !(#NULL == 0)) || !(\old(counter) == 0)) || !(\valid[2] == 1)) || unknown-#StackHeapBarrier-unknown <= 0) || !(11 == unknown-#length-unknown[2])) || (a * 2 + s + 1 == t * 2 + a * a && t == a * 2 + 1) RESULT: Ultimate proved your program to be correct! [2023-04-02 23:33:53,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...