/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/ps2-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 23:23:24,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 23:23:24,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 23:23:24,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 23:23:24,759 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 23:23:24,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 23:23:24,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 23:23:24,766 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 23:23:24,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 23:23:24,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 23:23:24,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 23:23:24,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 23:23:24,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 23:23:24,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 23:23:24,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 23:23:24,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 23:23:24,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 23:23:24,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 23:23:24,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 23:23:24,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 23:23:24,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 23:23:24,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 23:23:24,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 23:23:24,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 23:23:24,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 23:23:24,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 23:23:24,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 23:23:24,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 23:23:24,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 23:23:24,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 23:23:24,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 23:23:24,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 23:23:24,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 23:23:24,797 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 23:23:24,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 23:23:24,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 23:23:24,798 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 23:23:24,798 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 23:23:24,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 23:23:24,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 23:23:24,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 23:23:24,800 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 23:23:24,827 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 23:23:24,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 23:23:24,827 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 23:23:24,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 23:23:24,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 23:23:24,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 23:23:24,828 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 23:23:24,828 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 23:23:24,828 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 23:23:24,828 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 23:23:24,829 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 23:23:24,829 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 23:23:24,829 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 23:23:24,829 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 23:23:24,829 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 23:23:24,829 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 23:23:24,830 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 23:23:24,830 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 23:23:24,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 23:23:24,830 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 23:23:24,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 23:23:24,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 23:23:24,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 23:23:24,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 23:23:24,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 23:23:24,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 23:23:24,831 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 23:23:24,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 23:23:24,831 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 23:23:24,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 23:23:24,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 23:23:24,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 23:23:24,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:23:24,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 23:23:24,831 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 23:23:24,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 23:23:24,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 23:23:24,832 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 23:23:24,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 23:23:24,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 23:23:24,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 23:23:24,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 23:23:25,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 23:23:25,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 23:23:25,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 23:23:25,059 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 23:23:25,059 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 23:23:25,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound2.c [2023-04-02 23:23:26,019 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 23:23:26,167 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 23:23:26,168 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps2-ll_unwindbound2.c [2023-04-02 23:23:26,172 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ee75e993/cfe384aecaa34321a5724fb6563b49de/FLAG59d9a8084 [2023-04-02 23:23:26,183 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ee75e993/cfe384aecaa34321a5724fb6563b49de [2023-04-02 23:23:26,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 23:23:26,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 23:23:26,189 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 23:23:26,189 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 23:23:26,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 23:23:26,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:23:26" (1/1) ... [2023-04-02 23:23:26,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f259d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:23:26, skipping insertion in model container [2023-04-02 23:23:26,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 11:23:26" (1/1) ... [2023-04-02 23:23:26,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 23:23:26,210 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 23:23:26,318 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/ps2-ll_unwindbound2.c[454,467] [2023-04-02 23:23:26,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:23:26,336 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 23:23:26,344 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/ps2-ll_unwindbound2.c[454,467] [2023-04-02 23:23:26,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 23:23:26,359 INFO L208 MainTranslator]: Completed translation [2023-04-02 23:23:26,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:23:26 WrapperNode [2023-04-02 23:23:26,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 23:23:26,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 23:23:26,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 23:23:26,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 23:23:26,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:23:26" (1/1) ... [2023-04-02 23:23:26,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:23:26" (1/1) ... [2023-04-02 23:23:26,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:23:26" (1/1) ... [2023-04-02 23:23:26,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:23:26" (1/1) ... [2023-04-02 23:23:26,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:23:26" (1/1) ... [2023-04-02 23:23:26,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:23:26" (1/1) ... [2023-04-02 23:23:26,387 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:23:26" (1/1) ... [2023-04-02 23:23:26,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:23:26" (1/1) ... [2023-04-02 23:23:26,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 23:23:26,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 23:23:26,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 23:23:26,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 23:23:26,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:23:26" (1/1) ... [2023-04-02 23:23:26,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 23:23:26,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:23:26,413 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 23:23:26,419 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 23:23:26,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 23:23:26,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 23:23:26,437 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 23:23:26,437 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 23:23:26,437 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 23:23:26,437 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 23:23:26,437 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 23:23:26,437 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 23:23:26,437 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 23:23:26,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 23:23:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 23:23:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 23:23:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 23:23:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 23:23:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 23:23:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 23:23:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 23:23:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 23:23:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 23:23:26,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 23:23:26,483 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 23:23:26,485 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 23:23:26,557 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 23:23:26,574 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 23:23:26,574 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 23:23:26,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:23:26 BoogieIcfgContainer [2023-04-02 23:23:26,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 23:23:26,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 23:23:26,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 23:23:26,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 23:23:26,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 11:23:26" (1/3) ... [2023-04-02 23:23:26,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ca8db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:23:26, skipping insertion in model container [2023-04-02 23:23:26,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 11:23:26" (2/3) ... [2023-04-02 23:23:26,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ca8db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 11:23:26, skipping insertion in model container [2023-04-02 23:23:26,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 11:23:26" (3/3) ... [2023-04-02 23:23:26,581 INFO L112 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound2.c [2023-04-02 23:23:26,592 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 23:23:26,592 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 23:23:26,619 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 23:23:26,623 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;@6a252218, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 23:23:26,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 23:23:26,626 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 23:23:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-02 23:23:26,630 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:23:26,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:23:26,631 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:23:26,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:23:26,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1383616401, now seen corresponding path program 1 times [2023-04-02 23:23:26,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:23:26,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075514862] [2023-04-02 23:23:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:23:26,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:23:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:23:26,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:23:26,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075514862] [2023-04-02 23:23:26,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-04-02 23:23:26,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828159803] [2023-04-02 23:23:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:23:26,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:23:26,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:23:26,720 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 23:23:26,721 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 23:23:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:23:26,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 23:23:26,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:23:26,815 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 23:23:26,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:23:26,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828159803] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:23:26,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:23:26,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 23:23:26,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599032335] [2023-04-02 23:23:26,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:23:26,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 23:23:26,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:23:26,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 23:23:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 23:23:26,853 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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 23:23:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:23:26,885 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2023-04-02 23:23:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 23:23:26,887 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 23:23:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:23:26,891 INFO L225 Difference]: With dead ends: 35 [2023-04-02 23:23:26,891 INFO L226 Difference]: Without dead ends: 16 [2023-04-02 23:23:26,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 23:23:26,897 INFO L413 NwaCegarLoop]: 20 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, 20 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 23:23:26,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:23:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-04-02 23:23:26,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-04-02 23:23:26,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 4 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 23:23:26,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-04-02 23:23:26,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2023-04-02 23:23:26,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:23:26,922 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-04-02 23:23:26,923 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 23:23:26,923 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-04-02 23:23:26,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 23:23:26,923 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:23:26,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:23:26,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 23:23:27,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 23:23:27,131 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:23:27,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:23:27,131 INFO L85 PathProgramCache]: Analyzing trace with hash -344706246, now seen corresponding path program 1 times [2023-04-02 23:23:27,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:23:27,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453284407] [2023-04-02 23:23:27,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:23:27,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:23:27,148 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:23:27,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492567890] [2023-04-02 23:23:27,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:23:27,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:23:27,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:23:27,155 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 23:23:27,156 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 23:23:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:23:27,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 23:23:27,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:23:27,260 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 23:23:27,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:23:27,260 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:23:27,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453284407] [2023-04-02 23:23:27,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:23:27,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492567890] [2023-04-02 23:23:27,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492567890] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:23:27,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:23:27,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 23:23:27,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295398409] [2023-04-02 23:23:27,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:23:27,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 23:23:27,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:23:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 23:23:27,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 23:23:27,263 INFO L87 Difference]: Start difference. First operand 16 states and 18 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 23:23:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:23:27,272 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2023-04-02 23:23:27,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 23:23:27,272 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 23:23:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:23:27,273 INFO L225 Difference]: With dead ends: 25 [2023-04-02 23:23:27,273 INFO L226 Difference]: Without dead ends: 18 [2023-04-02 23:23:27,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 23:23:27,274 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 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 23:23:27,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:23:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-04-02 23:23:27,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-04-02 23:23:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 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 23:23:27,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-02 23:23:27,277 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2023-04-02 23:23:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:23:27,278 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-02 23:23:27,278 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 23:23:27,278 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-02 23:23:27,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 23:23:27,278 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:23:27,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:23:27,291 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 23:23:27,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-04-02 23:23:27,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:23:27,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:23:27,483 INFO L85 PathProgramCache]: Analyzing trace with hash -342918786, now seen corresponding path program 1 times [2023-04-02 23:23:27,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:23:27,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773051] [2023-04-02 23:23:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:23:27,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:23:27,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:23:27,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144187930] [2023-04-02 23:23:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:23:27,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:23:27,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:23:27,493 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 23:23:27,496 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 23:23:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:23:27,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-02 23:23:27,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:23:27,589 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 23:23:27,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 23:23:27,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:23:27,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773051] [2023-04-02 23:23:27,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:23:27,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144187930] [2023-04-02 23:23:27,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144187930] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 23:23:27,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 23:23:27,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 23:23:27,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004915196] [2023-04-02 23:23:27,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 23:23:27,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:23:27,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:23:27,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:23:27,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 23:23:27,591 INFO L87 Difference]: Start difference. First operand 18 states and 20 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 23:23:27,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:23:27,630 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-04-02 23:23:27,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 23:23:27,631 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 23:23:27,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:23:27,631 INFO L225 Difference]: With dead ends: 27 [2023-04-02 23:23:27,631 INFO L226 Difference]: Without dead ends: 24 [2023-04-02 23:23:27,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 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 23:23:27,634 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:23:27,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 46 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:23:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-02 23:23:27,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-04-02 23:23:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 23:23:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-04-02 23:23:27,640 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 11 [2023-04-02 23:23:27,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:23:27,640 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-04-02 23:23:27,640 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 23:23:27,640 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-04-02 23:23:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 23:23:27,641 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:23:27,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:23:27,653 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 23:23:27,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:23:27,845 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:23:27,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:23:27,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1383768226, now seen corresponding path program 1 times [2023-04-02 23:23:27,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:23:27,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822315743] [2023-04-02 23:23:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:23:27,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:23:27,853 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:23:27,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321736125] [2023-04-02 23:23:27,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:23:27,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:23:27,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:23:27,861 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 23:23:27,863 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 23:23:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:23:27,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-02 23:23:27,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:23:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:23:27,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:23:27,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:23:27,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:23:27,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822315743] [2023-04-02 23:23:27,982 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:23:27,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321736125] [2023-04-02 23:23:27,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321736125] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:23:27,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1592181818] [2023-04-02 23:23:27,994 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-02 23:23:27,994 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:23:27,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:23:28,000 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:23:28,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:23:28,080 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:23:28,668 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 32 for LOIs [2023-04-02 23:23:28,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:23:28,686 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:23:29,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '447#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (<= ~counter~0 4294967296) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-02 23:23:29,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:23:29,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:23:29,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2023-04-02 23:23:29,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413775147] [2023-04-02 23:23:29,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:23:29,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 23:23:29,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:23:29,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 23:23:29,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-04-02 23:23:29,299 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 23:23:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:23:29,319 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-04-02 23:23:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 23:23:29,319 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-04-02 23:23:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:23:29,320 INFO L225 Difference]: With dead ends: 33 [2023-04-02 23:23:29,320 INFO L226 Difference]: Without dead ends: 26 [2023-04-02 23:23:29,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-04-02 23:23:29,321 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:23:29,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:23:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-04-02 23:23:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-04-02 23:23:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 23:23:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-04-02 23:23:29,324 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2023-04-02 23:23:29,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:23:29,324 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-04-02 23:23:29,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 23:23:29,324 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-04-02 23:23:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 23:23:29,325 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 23:23:29,325 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 23:23:29,331 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 23:23:29,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:23:29,529 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 23:23:29,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 23:23:29,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1381980766, now seen corresponding path program 1 times [2023-04-02 23:23:29,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 23:23:29,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888232573] [2023-04-02 23:23:29,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:23:29,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 23:23:29,536 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 23:23:29,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809840555] [2023-04-02 23:23:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 23:23:29,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:23:29,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 23:23:29,547 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 23:23:29,549 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 23:23:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 23:23:29,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2023-04-02 23:23:29,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 23:23:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:23:29,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 23:23:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 23:23:29,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 23:23:29,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888232573] [2023-04-02 23:23:29,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 23:23:29,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809840555] [2023-04-02 23:23:29,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809840555] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 23:23:29,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035474981] [2023-04-02 23:23:29,671 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 23:23:29,671 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 23:23:29,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 23:23:29,671 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 23:23:29,671 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 23:23:29,688 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 13 for LOIs [2023-04-02 23:23:29,941 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2023-04-02 23:23:29,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-04-02 23:23:29,974 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 23:23:30,357 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '668#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (< ~counter~0 3) (= |#NULL.base| 0))' at error location [2023-04-02 23:23:30,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 23:23:30,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 23:23:30,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-04-02 23:23:30,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680310513] [2023-04-02 23:23:30,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 23:23:30,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 23:23:30,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 23:23:30,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 23:23:30,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-04-02 23:23:30,358 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 23:23:30,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 23:23:30,401 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-04-02 23:23:30,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 23:23:30,401 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-04-02 23:23:30,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 23:23:30,401 INFO L225 Difference]: With dead ends: 29 [2023-04-02 23:23:30,401 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 23:23:30,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-04-02 23:23:30,402 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 23:23:30,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 70 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 23:23:30,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 23:23:30,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 23:23:30,403 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 23:23:30,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 23:23:30,403 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2023-04-02 23:23:30,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 23:23:30,403 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 23:23:30,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 23:23:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 23:23:30,403 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 23:23:30,405 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 23:23:30,412 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 23:23:30,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 23:23:30,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 23:23:30,644 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2023-04-02 23:23:30,644 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 3) no Hoare annotation was computed. [2023-04-02 23:23:30,644 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(lines 6 8) no Hoare annotation was computed. [2023-04-02 23:23:30,644 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2023-04-02 23:23:30,644 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (or (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0))) (< 0 |old(~counter~0)|)) [2023-04-02 23:23:30,644 INFO L899 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2023-04-02 23:23:30,644 INFO L899 garLoopResultBuilder]: For program point L27-1(lines 27 36) no Hoare annotation was computed. [2023-04-02 23:23:30,644 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 18 40) no Hoare annotation was computed. [2023-04-02 23:23:30,644 INFO L895 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (or (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0))) (< 0 |old(~counter~0)|)) [2023-04-02 23:23:30,645 INFO L895 garLoopResultBuilder]: At program point L27-4(lines 27 36) the Hoare annotation is: (or (= (* main_~x~0 2) (+ main_~y~0 (* main_~y~0 main_~y~0))) (< 0 |old(~counter~0)|)) [2023-04-02 23:23:30,645 INFO L895 garLoopResultBuilder]: At program point $Ultimate##0(lines 18 40) the Hoare annotation is: (or (<= ~counter~0 0) (< 0 |old(~counter~0)|)) [2023-04-02 23:23:30,645 INFO L899 garLoopResultBuilder]: For program point L37(line 37) no Hoare annotation was computed. [2023-04-02 23:23:30,645 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 23:23:30,645 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 23:23:30,645 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 23:23:30,645 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2023-04-02 23:23:30,645 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 23:23:30,645 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 23:23:30,645 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2023-04-02 23:23:30,645 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2023-04-02 23:23:30,645 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2023-04-02 23:23:30,645 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 15) the Hoare annotation is: true [2023-04-02 23:23:30,645 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2023-04-02 23:23:30,645 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2023-04-02 23:23:30,647 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-04-02 23:23:30,649 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 23:23:30,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 11:23:30 BoogieIcfgContainer [2023-04-02 23:23:30,657 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 23:23:30,658 INFO L158 Benchmark]: Toolchain (without parser) took 4471.20ms. Allocated memory was 247.5MB in the beginning and 297.8MB in the end (delta: 50.3MB). Free memory was 198.1MB in the beginning and 249.6MB in the end (delta: -51.5MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 23:23:30,658 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 199.2MB. Free memory was 145.5MB in the beginning and 145.4MB in the end (delta: 115.5kB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 23:23:30,658 INFO L158 Benchmark]: CACSL2BoogieTranslator took 170.83ms. Allocated memory is still 247.5MB. Free memory was 198.1MB in the beginning and 187.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 23:23:30,658 INFO L158 Benchmark]: Boogie Preprocessor took 31.95ms. Allocated memory is still 247.5MB. Free memory was 187.6MB in the beginning and 186.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 23:23:30,658 INFO L158 Benchmark]: RCFGBuilder took 183.07ms. Allocated memory is still 247.5MB. Free memory was 186.0MB in the beginning and 175.0MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-02 23:23:30,659 INFO L158 Benchmark]: TraceAbstraction took 4080.01ms. Allocated memory was 247.5MB in the beginning and 297.8MB in the end (delta: 50.3MB). Free memory was 174.0MB in the beginning and 249.6MB in the end (delta: -75.6MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 23:23:30,659 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 199.2MB. Free memory was 145.5MB in the beginning and 145.4MB in the end (delta: 115.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 170.83ms. Allocated memory is still 247.5MB. Free memory was 198.1MB in the beginning and 187.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.95ms. Allocated memory is still 247.5MB. Free memory was 187.6MB in the beginning and 186.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 183.07ms. Allocated memory is still 247.5MB. Free memory was 186.0MB in the beginning and 175.0MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 4080.01ms. Allocated memory was 247.5MB in the beginning and 297.8MB in the end (delta: 50.3MB). Free memory was 174.0MB in the beginning and 249.6MB in the end (delta: -75.6MB). There was no memory consumed. 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: 12]: 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, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.0s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 20 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18 mSDsluCounter, 222 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 145 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 100 IncrementalHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 77 mSDtfsCounter, 100 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 144 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=4, InterpolantAutomatonStates: 24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 17 PreInvPairs, 26 NumberOfFragments, 52 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 65 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 101 ConstructedInterpolants, 0 QuantifiedInterpolants, 282 SizeOfPredicates, 6 NumberOfNonLiveVariables, 388 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 9/18 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: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: x * 2 == y + y * y || 0 < \old(counter) RESULT: Ultimate proved your program to be correct! [2023-04-02 23:23:30,674 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...