/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:22:30,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:22:30,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:22:30,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:22:30,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:22:30,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:22:30,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:22:30,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:22:30,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:22:30,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:22:30,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:22:30,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:22:30,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:22:30,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:22:30,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:22:30,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:22:30,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:22:30,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:22:30,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:22:30,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:22:30,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:22:30,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:22:30,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:22:30,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:22:30,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:22:30,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:22:30,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:22:30,561 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:22:30,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:22:30,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:22:30,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:22:30,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:22:30,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:22:30,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:22:30,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:22:30,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:22:30,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:22:30,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:22:30,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:22:30,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:22:30,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:22:30,568 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 23:22:30,595 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:22:30,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:22:30,595 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:22:30,595 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:22:30,596 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:22:30,596 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:22:30,596 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:22:30,596 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:22:30,597 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:22:30,597 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:22:30,597 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:22:30,597 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:22:30,597 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:22:30,598 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:22:30,598 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:22:30,598 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:22:30,598 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:22:30,598 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:22:30,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:22:30,599 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:22:30,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:22:30,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:22:30,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:22:30,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:22:30,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:22:30,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:22:30,600 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:22:30,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:22:30,600 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:22:30,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:22:30,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:22:30,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:22:30,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:22:30,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:22:30,601 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:22:30,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:22:30,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:22:30,601 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:22:30,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:22:30,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:22:30,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:22:30,602 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:22:30,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:22:30,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:22:30,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:22:30,833 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:22:30,833 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:22:30,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c [2023-03-31 23:22:31,915 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:22:32,054 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:22:32,056 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_valuebound50.c [2023-03-31 23:22:32,061 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/745c12dd6/49bb1017f8044372b0c6707bee56881e/FLAGce97fa7f7 [2023-03-31 23:22:32,071 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/745c12dd6/49bb1017f8044372b0c6707bee56881e [2023-03-31 23:22:32,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:22:32,073 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:22:32,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:22:32,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:22:32,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:22:32,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:22:32" (1/1) ... [2023-03-31 23:22:32,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa5f004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:32, skipping insertion in model container [2023-03-31 23:22:32,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:22:32" (1/1) ... [2023-03-31 23:22:32,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:22:32,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:22:32,198 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/hard2_valuebound50.c[526,539] [2023-03-31 23:22:32,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:22:32,214 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:22:32,222 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/hard2_valuebound50.c[526,539] [2023-03-31 23:22:32,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:22:32,236 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:22:32,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:32 WrapperNode [2023-03-31 23:22:32,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:22:32,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:22:32,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:22:32,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:22:32,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:32" (1/1) ... [2023-03-31 23:22:32,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:32" (1/1) ... [2023-03-31 23:22:32,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:32" (1/1) ... [2023-03-31 23:22:32,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:32" (1/1) ... [2023-03-31 23:22:32,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:32" (1/1) ... [2023-03-31 23:22:32,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:32" (1/1) ... [2023-03-31 23:22:32,261 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:32" (1/1) ... [2023-03-31 23:22:32,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:32" (1/1) ... [2023-03-31 23:22:32,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:22:32,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:22:32,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:22:32,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:22:32,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:32" (1/1) ... [2023-03-31 23:22:32,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:22:32,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:32,287 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 23:22:32,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 23:22:32,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:22:32,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:22:32,314 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:22:32,314 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:22:32,314 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:22:32,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:22:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:22:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:22:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:22:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:22:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:22:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:22:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:22:32,314 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:22:32,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:22:32,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:22:32,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:22:32,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:22:32,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:22:32,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:22:32,368 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:22:32,370 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:22:32,493 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:22:32,556 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:22:32,556 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-03-31 23:22:32,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:22:32 BoogieIcfgContainer [2023-03-31 23:22:32,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:22:32,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:22:32,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:22:32,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:22:32,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:22:32" (1/3) ... [2023-03-31 23:22:32,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5925242e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:22:32, skipping insertion in model container [2023-03-31 23:22:32,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:22:32" (2/3) ... [2023-03-31 23:22:32,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5925242e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:22:32, skipping insertion in model container [2023-03-31 23:22:32,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:22:32" (3/3) ... [2023-03-31 23:22:32,565 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound50.c [2023-03-31 23:22:32,578 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:22:32,578 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:22:32,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:22:32,621 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;@71d61e2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:22:32,621 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:22:32,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 23:22:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 23:22:32,629 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:32,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:32,630 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:32,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:32,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1934292817, now seen corresponding path program 1 times [2023-03-31 23:22:32,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:32,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283865280] [2023-03-31 23:22:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:32,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:22:32,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:32,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283865280] [2023-03-31 23:22:32,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283865280] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:22:32,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:22:32,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:22:32,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706403991] [2023-03-31 23:22:32,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:22:32,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:22:32,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:22:32,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:22:32,931 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 23:22:33,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:33,036 INFO L93 Difference]: Finished difference Result 63 states and 100 transitions. [2023-03-31 23:22:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:22:33,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-03-31 23:22:33,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:33,045 INFO L225 Difference]: With dead ends: 63 [2023-03-31 23:22:33,045 INFO L226 Difference]: Without dead ends: 36 [2023-03-31 23:22:33,048 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 [2023-03-31 23:22:33,050 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:33,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 99 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:22:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-03-31 23:22:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-03-31 23:22:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 23:22:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-03-31 23:22:33,080 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2023-03-31 23:22:33,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:33,080 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-03-31 23:22:33,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 23:22:33,082 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-03-31 23:22:33,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-03-31 23:22:33,082 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:33,082 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:33,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:22:33,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:33,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:33,083 INFO L85 PathProgramCache]: Analyzing trace with hash 667189618, now seen corresponding path program 1 times [2023-03-31 23:22:33,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:33,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015491354] [2023-03-31 23:22:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:33,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:33,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 23:22:33,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:33,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015491354] [2023-03-31 23:22:33,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015491354] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:22:33,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:22:33,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:22:33,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614200901] [2023-03-31 23:22:33,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:22:33,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:22:33,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:33,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:22:33,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:22:33,177 INFO L87 Difference]: Start difference. First operand 30 states and 36 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 23:22:33,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:33,236 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2023-03-31 23:22:33,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 23:22:33,236 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-03-31 23:22:33,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:33,237 INFO L225 Difference]: With dead ends: 42 [2023-03-31 23:22:33,237 INFO L226 Difference]: Without dead ends: 40 [2023-03-31 23:22:33,237 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 [2023-03-31 23:22:33,238 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:33,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 86 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:22:33,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-03-31 23:22:33,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-03-31 23:22:33,244 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), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 23:22:33,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-03-31 23:22:33,245 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 19 [2023-03-31 23:22:33,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:33,245 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-03-31 23:22:33,246 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 23:22:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-03-31 23:22:33,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 23:22:33,246 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:33,246 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:33,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 23:22:33,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:33,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:33,247 INFO L85 PathProgramCache]: Analyzing trace with hash 203307953, now seen corresponding path program 1 times [2023-03-31 23:22:33,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:33,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828336808] [2023-03-31 23:22:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:33,258 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:33,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674324122] [2023-03-31 23:22:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:33,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:33,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:33,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:22:33,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 23:22:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:33,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2023-03-31 23:22:33,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:22:33,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:22:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 23:22:33,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:33,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828336808] [2023-03-31 23:22:33,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:33,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674324122] [2023-03-31 23:22:33,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674324122] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:22:33,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146847154] [2023-03-31 23:22:33,633 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-03-31 23:22:33,633 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:22:33,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:22:33,643 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:22:33,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:22:33,724 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:22:33,904 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2023-03-31 23:22:33,910 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:22:33,922 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:22:33,931 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:22:34,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '459#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:22:34,207 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:22:34,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:22:34,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-03-31 23:22:34,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512278788] [2023-03-31 23:22:34,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:22:34,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 23:22:34,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:34,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 23:22:34,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2023-03-31 23:22:34,209 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-31 23:22:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:34,379 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2023-03-31 23:22:34,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:22:34,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 24 [2023-03-31 23:22:34,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:34,382 INFO L225 Difference]: With dead ends: 68 [2023-03-31 23:22:34,382 INFO L226 Difference]: Without dead ends: 55 [2023-03-31 23:22:34,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2023-03-31 23:22:34,383 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:34,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 63 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:22:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-03-31 23:22:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-03-31 23:22:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-03-31 23:22:34,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2023-03-31 23:22:34,395 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 24 [2023-03-31 23:22:34,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:34,395 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2023-03-31 23:22:34,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2023-03-31 23:22:34,396 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2023-03-31 23:22:34,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 23:22:34,396 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:34,397 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:34,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 23:22:34,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:34,605 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:34,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:34,605 INFO L85 PathProgramCache]: Analyzing trace with hash -421588801, now seen corresponding path program 1 times [2023-03-31 23:22:34,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:34,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249071250] [2023-03-31 23:22:34,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:34,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:34,614 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:34,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526484532] [2023-03-31 23:22:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:34,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:34,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:34,616 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) [2023-03-31 23:22:34,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 23:22:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:34,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2023-03-31 23:22:34,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:22:34,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:22:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 23:22:34,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249071250] [2023-03-31 23:22:34,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526484532] [2023-03-31 23:22:34,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526484532] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:22:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [375152098] [2023-03-31 23:22:34,817 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-03-31 23:22:34,817 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:22:34,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:22:34,817 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:22:34,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:22:34,846 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:22:34,968 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 23:22:34,979 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:22:34,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:22:34,994 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:22:35,348 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '861#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:22:35,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:22:35,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:22:35,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-03-31 23:22:35,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592538101] [2023-03-31 23:22:35,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:22:35,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:22:35,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:35,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:22:35,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-03-31 23:22:35,350 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-31 23:22:35,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:35,446 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2023-03-31 23:22:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:22:35,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 31 [2023-03-31 23:22:35,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:35,450 INFO L225 Difference]: With dead ends: 64 [2023-03-31 23:22:35,450 INFO L226 Difference]: Without dead ends: 57 [2023-03-31 23:22:35,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-03-31 23:22:35,453 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:35,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 52 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:22:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-03-31 23:22:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-03-31 23:22:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2023-03-31 23:22:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2023-03-31 23:22:35,473 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 31 [2023-03-31 23:22:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:35,474 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2023-03-31 23:22:35,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-31 23:22:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2023-03-31 23:22:35,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 23:22:35,475 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:35,475 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:35,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 23:22:35,678 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,SelfDestructingSolverStorable3 [2023-03-31 23:22:35,678 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:35,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:35,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1494414942, now seen corresponding path program 1 times [2023-03-31 23:22:35,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:35,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120115345] [2023-03-31 23:22:35,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:35,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:35,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:35,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199118733] [2023-03-31 23:22:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:35,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:35,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:35,690 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) [2023-03-31 23:22:35,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 23:22:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:35,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2023-03-31 23:22:35,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-31 23:22:35,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:22:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-03-31 23:22:37,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:37,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120115345] [2023-03-31 23:22:37,303 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:37,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199118733] [2023-03-31 23:22:37,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199118733] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:22:37,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18345360] [2023-03-31 23:22:37,305 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:22:37,305 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:22:37,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:22:37,305 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:22:37,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:22:37,346 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:22:37,845 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:22:37,847 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:22:37,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:22:37,857 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:22:38,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1433#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:22:38,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:22:38,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:22:38,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-03-31 23:22:38,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306448271] [2023-03-31 23:22:38,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:22:38,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 23:22:38,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:38,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 23:22:38,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2023-03-31 23:22:38,132 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-03-31 23:22:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:38,964 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2023-03-31 23:22:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 23:22:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) Word has length 60 [2023-03-31 23:22:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:38,966 INFO L225 Difference]: With dead ends: 107 [2023-03-31 23:22:38,966 INFO L226 Difference]: Without dead ends: 95 [2023-03-31 23:22:38,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:22:38,967 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:38,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 113 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:22:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-03-31 23:22:38,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2023-03-31 23:22:38,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 56 states have internal predecessors, (59), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2023-03-31 23:22:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2023-03-31 23:22:38,989 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 60 [2023-03-31 23:22:38,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:38,990 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2023-03-31 23:22:38,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 5 states have call predecessors, (18), 6 states have call successors, (18) [2023-03-31 23:22:38,990 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2023-03-31 23:22:38,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-31 23:22:38,991 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:38,991 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:38,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 23:22:39,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:39,199 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:39,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:39,199 INFO L85 PathProgramCache]: Analyzing trace with hash 724402433, now seen corresponding path program 2 times [2023-03-31 23:22:39,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:39,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049993597] [2023-03-31 23:22:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:39,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:39,206 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:39,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019258442] [2023-03-31 23:22:39,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:22:39,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:39,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:39,208 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) [2023-03-31 23:22:39,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 23:22:39,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 23:22:39,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:22:39,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-31 23:22:39,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-03-31 23:22:39,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:22:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-03-31 23:22:40,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:40,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049993597] [2023-03-31 23:22:40,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:40,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019258442] [2023-03-31 23:22:40,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019258442] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:22:40,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [521114962] [2023-03-31 23:22:40,684 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:22:40,684 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:22:40,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:22:40,684 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:22:40,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:22:40,699 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:22:41,044 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:22:41,046 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:22:41,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:22:41,053 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:22:41,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2154#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:22:41,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:22:41,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:22:41,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-03-31 23:22:41,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858398903] [2023-03-31 23:22:41,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:22:41,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 23:22:41,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:41,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 23:22:41,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:22:41,296 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 7 states have call predecessors, (20), 9 states have call successors, (20) [2023-03-31 23:22:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:42,670 INFO L93 Difference]: Finished difference Result 117 states and 136 transitions. [2023-03-31 23:22:42,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-31 23:22:42,670 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 7 states have call predecessors, (20), 9 states have call successors, (20) Word has length 65 [2023-03-31 23:22:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:42,671 INFO L225 Difference]: With dead ends: 117 [2023-03-31 23:22:42,671 INFO L226 Difference]: Without dead ends: 98 [2023-03-31 23:22:42,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:22:42,673 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 23 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:42,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 151 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 23:22:42,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-03-31 23:22:42,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2023-03-31 23:22:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 60 states have internal predecessors, (61), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2023-03-31 23:22:42,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 110 transitions. [2023-03-31 23:22:42,689 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 110 transitions. Word has length 65 [2023-03-31 23:22:42,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:42,689 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 110 transitions. [2023-03-31 23:22:42,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 7 states have call predecessors, (20), 9 states have call successors, (20) [2023-03-31 23:22:42,689 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 110 transitions. [2023-03-31 23:22:42,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-03-31 23:22:42,690 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:42,690 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:42,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 23:22:42,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:42,895 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:42,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:42,896 INFO L85 PathProgramCache]: Analyzing trace with hash 920785569, now seen corresponding path program 1 times [2023-03-31 23:22:42,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:42,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732796174] [2023-03-31 23:22:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:42,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:42,902 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:42,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110710737] [2023-03-31 23:22:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:42,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:42,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:42,903 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) [2023-03-31 23:22:42,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 23:22:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:42,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2023-03-31 23:22:42,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-03-31 23:22:43,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:22:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-03-31 23:22:43,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:43,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732796174] [2023-03-31 23:22:43,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:43,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110710737] [2023-03-31 23:22:43,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110710737] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:22:43,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1464068772] [2023-03-31 23:22:43,663 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-03-31 23:22:43,664 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:22:43,664 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:22:43,664 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:22:43,664 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:22:43,678 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:22:44,043 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:22:44,046 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:22:44,049 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:22:44,070 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:22:44,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2933#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:22:44,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:22:44,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:22:44,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2023-03-31 23:22:44,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827975583] [2023-03-31 23:22:44,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:22:44,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-03-31 23:22:44,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-03-31 23:22:44,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-03-31 23:22:44,346 INFO L87 Difference]: Start difference. First operand 97 states and 110 transitions. Second operand has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-03-31 23:22:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:44,793 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2023-03-31 23:22:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 23:22:44,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 71 [2023-03-31 23:22:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:44,794 INFO L225 Difference]: With dead ends: 118 [2023-03-31 23:22:44,794 INFO L226 Difference]: Without dead ends: 103 [2023-03-31 23:22:44,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 23:22:44,795 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:44,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 119 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:22:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-03-31 23:22:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2023-03-31 23:22:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-03-31 23:22:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2023-03-31 23:22:44,826 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 71 [2023-03-31 23:22:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:44,826 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2023-03-31 23:22:44,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-03-31 23:22:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2023-03-31 23:22:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-03-31 23:22:44,827 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:44,827 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:44,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-03-31 23:22:45,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:45,032 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:45,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash -248496609, now seen corresponding path program 1 times [2023-03-31 23:22:45,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:45,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795952370] [2023-03-31 23:22:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:45,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:45,038 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:45,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140206237] [2023-03-31 23:22:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:45,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:45,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:45,039 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:22:45,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 23:22:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:22:45,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 23:22:45,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:45,132 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-03-31 23:22:45,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:22:45,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:22:45,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795952370] [2023-03-31 23:22:45,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:22:45,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140206237] [2023-03-31 23:22:45,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140206237] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:22:45,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:22:45,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:22:45,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2590590] [2023-03-31 23:22:45,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:22:45,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:22:45,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:22:45,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:22:45,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:22:45,134 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-03-31 23:22:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:22:45,182 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2023-03-31 23:22:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:22:45,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2023-03-31 23:22:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:22:45,185 INFO L225 Difference]: With dead ends: 96 [2023-03-31 23:22:45,185 INFO L226 Difference]: Without dead ends: 84 [2023-03-31 23:22:45,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:22:45,186 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:22:45,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 104 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:22:45,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-03-31 23:22:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-03-31 23:22:45,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 20 states have call successors, (20), 14 states have call predecessors, (20), 13 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-03-31 23:22:45,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2023-03-31 23:22:45,201 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 81 [2023-03-31 23:22:45,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:22:45,201 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2023-03-31 23:22:45,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-03-31 23:22:45,201 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2023-03-31 23:22:45,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-03-31 23:22:45,202 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:22:45,202 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:22:45,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-03-31 23:22:45,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:45,410 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:22:45,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:22:45,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2082694307, now seen corresponding path program 3 times [2023-03-31 23:22:45,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:22:45,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703109225] [2023-03-31 23:22:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:22:45,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:22:45,419 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:22:45,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313008922] [2023-03-31 23:22:45,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:22:45,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:22:45,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:22:45,426 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:22:45,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 23:22:45,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:22:45,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:22:45,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2023-03-31 23:22:45,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:22:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 61 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-03-31 23:22:45,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:23:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 54 proven. 61 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-03-31 23:23:16,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:23:16,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703109225] [2023-03-31 23:23:16,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:23:16,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313008922] [2023-03-31 23:23:16,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313008922] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:23:16,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1196589958] [2023-03-31 23:23:16,293 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-03-31 23:23:16,293 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:23:16,294 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:23:16,294 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:23:16,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:23:16,308 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 23:23:16,644 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2023-03-31 23:23:16,646 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 29 for LOIs [2023-03-31 23:23:16,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 23:23:16,652 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:23:17,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4324#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0))' at error location [2023-03-31 23:23:17,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:23:17,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:23:17,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2023-03-31 23:23:17,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43717142] [2023-03-31 23:23:17,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:23:17,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-31 23:23:17,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:23:17,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-31 23:23:17,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2023-03-31 23:23:17,344 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 19 states have internal predecessors, (40), 15 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 11 states have call predecessors, (28), 13 states have call successors, (28)