/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/fermat2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:18:33,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:18:33,648 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:18:33,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:18:33,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:18:33,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:18:33,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:18:33,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:18:33,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:18:33,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:18:33,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:18:33,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 23:18:33,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 23:18:33,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 23:18:33,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 23:18:33,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 23:18:33,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 23:18:33,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 23:18:33,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 23:18:33,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 23:18:33,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 23:18:33,719 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 23:18:33,720 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 23:18:33,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 23:18:33,729 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 23:18:33,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 23:18:33,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 23:18:33,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 23:18:33,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 23:18:33,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 23:18:33,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 23:18:33,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 23:18:33,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 23:18:33,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 23:18:33,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 23:18:33,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 23:18:33,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 23:18:33,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 23:18:33,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:18:33,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:18:33,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:18:33,738 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 23:18:33,765 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:18:33,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:18:33,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:18:33,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:18:33,766 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:18:33,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:18:33,767 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:18:33,767 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:18:33,767 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:18:33,767 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:18:33,768 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:18:33,768 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:18:33,769 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:18:33,769 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:18:33,769 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:18:33,769 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:18:33,769 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:18:33,769 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:18:33,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:18:33,770 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:18:33,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:18:33,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:18:33,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:18:33,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:18:33,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:18:33,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:18:33,771 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:18:33,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:18:33,772 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:18:33,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:18:33,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:18:33,772 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:18:33,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:18:33,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:18:33,773 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:18:33,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:18:33,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:18:33,773 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:18:33,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:18:33,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:18:33,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:18:33,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:18:34,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:18:34,031 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:18:34,033 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:18:34,034 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:18:34,034 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:18:34,035 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2023-03-31 23:18:35,143 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:18:35,337 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:18:35,337 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2023-03-31 23:18:35,342 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97cc3c393/5da05a95a8ea415f9b1f14d432b5d6b8/FLAGf327881ab [2023-03-31 23:18:35,353 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97cc3c393/5da05a95a8ea415f9b1f14d432b5d6b8 [2023-03-31 23:18:35,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:18:35,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:18:35,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:18:35,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:18:35,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:18:35,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:18:35" (1/1) ... [2023-03-31 23:18:35,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a34025c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:18:35, skipping insertion in model container [2023-03-31 23:18:35,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:18:35" (1/1) ... [2023-03-31 23:18:35,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:18:35,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:18:35,496 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/fermat2-ll_unwindbound100.c[524,537] [2023-03-31 23:18:35,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:18:35,528 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:18:35,540 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/fermat2-ll_unwindbound100.c[524,537] [2023-03-31 23:18:35,554 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:18:35,564 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:18:35,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:18:35 WrapperNode [2023-03-31 23:18:35,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:18:35,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:18:35,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:18:35,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:18:35,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:18:35" (1/1) ... [2023-03-31 23:18:35,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:18:35" (1/1) ... [2023-03-31 23:18:35,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:18:35" (1/1) ... [2023-03-31 23:18:35,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:18:35" (1/1) ... [2023-03-31 23:18:35,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:18:35" (1/1) ... [2023-03-31 23:18:35,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:18:35" (1/1) ... [2023-03-31 23:18:35,597 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:18:35" (1/1) ... [2023-03-31 23:18:35,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:18:35" (1/1) ... [2023-03-31 23:18:35,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:18:35,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:18:35,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:18:35,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:18:35,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:18:35" (1/1) ... [2023-03-31 23:18:35,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:18:35,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:35,628 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 23:18:35,630 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 23:18:35,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:18:35,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:18:35,655 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:18:35,655 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 23:18:35,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:18:35,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:18:35,655 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:18:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:18:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:18:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:18:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 23:18:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 23:18:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:18:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:18:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:18:35,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:18:35,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:18:35,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:18:35,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:18:35,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:18:35,711 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:18:35,713 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:18:35,923 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:18:35,971 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:18:35,971 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 23:18:35,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:18:35 BoogieIcfgContainer [2023-03-31 23:18:35,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:18:35,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:18:35,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:18:35,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:18:35,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:18:35" (1/3) ... [2023-03-31 23:18:35,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bd554d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:18:35, skipping insertion in model container [2023-03-31 23:18:35,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:18:35" (2/3) ... [2023-03-31 23:18:35,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bd554d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:18:35, skipping insertion in model container [2023-03-31 23:18:35,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:18:35" (3/3) ... [2023-03-31 23:18:35,997 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.c [2023-03-31 23:18:36,017 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:18:36,017 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:18:36,079 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:18:36,086 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;@3b4a94c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:18:36,086 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:18:36,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 23:18:36,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 23:18:36,098 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:36,099 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:18:36,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:36,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:36,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1539655439, now seen corresponding path program 1 times [2023-03-31 23:18:36,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:36,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359988889] [2023-03-31 23:18:36,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:36,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:36,214 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:36,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509703423] [2023-03-31 23:18:36,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:36,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:36,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:36,218 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 23:18:36,237 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 23:18:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:18:36,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 23:18:36,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:18:36,352 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:18:36,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:36,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359988889] [2023-03-31 23:18:36,353 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:36,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509703423] [2023-03-31 23:18:36,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509703423] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:18:36,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:18:36,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 23:18:36,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275885521] [2023-03-31 23:18:36,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:18:36,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 23:18:36,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:18:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 23:18:36,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:18:36,398 INFO L87 Difference]: Start difference. First operand has 25 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 23:18:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:36,433 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2023-03-31 23:18:36,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 23:18:36,435 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-03-31 23:18:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:36,443 INFO L225 Difference]: With dead ends: 40 [2023-03-31 23:18:36,443 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 23:18:36,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 23:18:36,454 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:18:36,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:18:36,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 23:18:36,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 23:18:36,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 23:18:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-03-31 23:18:36,493 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 17 [2023-03-31 23:18:36,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:36,495 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-03-31 23:18:36,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 23:18:36,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-03-31 23:18:36,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 23:18:36,498 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:36,498 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:18:36,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 23:18:36,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 23:18:36,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:36,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:36,709 INFO L85 PathProgramCache]: Analyzing trace with hash -98483365, now seen corresponding path program 1 times [2023-03-31 23:18:36,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:36,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522811918] [2023-03-31 23:18:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:36,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:36,727 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:36,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2067196741] [2023-03-31 23:18:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:36,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:36,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:36,743 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 23:18:36,746 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 23:18:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:18:36,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 23:18:36,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:36,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:18:36,869 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:18:36,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:36,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522811918] [2023-03-31 23:18:36,869 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:36,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067196741] [2023-03-31 23:18:36,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067196741] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:18:36,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:18:36,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 23:18:36,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609512055] [2023-03-31 23:18:36,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:18:36,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 23:18:36,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:18:36,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 23:18:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:18:36,875 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 23:18:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:36,902 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2023-03-31 23:18:36,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 23:18:36,902 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2023-03-31 23:18:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:36,903 INFO L225 Difference]: With dead ends: 30 [2023-03-31 23:18:36,903 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 23:18:36,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 23:18:36,905 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:18:36,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:18:36,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 23:18:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-03-31 23:18:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 23:18:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-03-31 23:18:36,911 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2023-03-31 23:18:36,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:36,911 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-03-31 23:18:36,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-31 23:18:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-03-31 23:18:36,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 23:18:36,912 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:36,912 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:18:36,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 23:18:37,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-03-31 23:18:37,118 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:37,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:37,119 INFO L85 PathProgramCache]: Analyzing trace with hash -96695905, now seen corresponding path program 1 times [2023-03-31 23:18:37,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:37,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450190617] [2023-03-31 23:18:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:37,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:37,160 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:37,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119544720] [2023-03-31 23:18:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:37,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:37,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:37,202 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 23:18:37,205 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 23:18:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:18:37,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 23:18:37,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:18:37,494 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 23:18:37,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450190617] [2023-03-31 23:18:37,495 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119544720] [2023-03-31 23:18:37,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119544720] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 23:18:37,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 23:18:37,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 23:18:37,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264678094] [2023-03-31 23:18:37,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 23:18:37,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 23:18:37,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:18:37,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 23:18:37,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 23:18:37,501 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 23:18:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:37,893 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-03-31 23:18:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 23:18:37,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 18 [2023-03-31 23:18:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:37,894 INFO L225 Difference]: With dead ends: 32 [2023-03-31 23:18:37,895 INFO L226 Difference]: Without dead ends: 30 [2023-03-31 23:18:37,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 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 23:18:37,896 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 23:18:37,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 59 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 23:18:37,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-03-31 23:18:37,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2023-03-31 23:18:37,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 23:18:37,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-03-31 23:18:37,904 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2023-03-31 23:18:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:37,905 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-03-31 23:18:37,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-31 23:18:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-03-31 23:18:37,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-03-31 23:18:37,906 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:37,906 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:18:37,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-03-31 23:18:38,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:38,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:38,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:38,114 INFO L85 PathProgramCache]: Analyzing trace with hash -353290452, now seen corresponding path program 1 times [2023-03-31 23:18:38,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:38,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358543036] [2023-03-31 23:18:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:38,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:38,128 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:38,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764411391] [2023-03-31 23:18:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:38,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:38,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:38,145 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 23:18:38,152 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 23:18:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:18:38,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 23:18:38,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:18:38,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:18:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:18:38,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:38,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358543036] [2023-03-31 23:18:38,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:38,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764411391] [2023-03-31 23:18:38,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764411391] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:18:38,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [584349935] [2023-03-31 23:18:38,478 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:18:38,478 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:18:38,483 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:18:38,487 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:18:38,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:18:38,574 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:18:38,963 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 15 for LOIs [2023-03-31 23:18:38,980 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:18:38,985 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:18:38,992 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:18:39,569 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '598#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= ~counter~0 1) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:18:39,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:18:39,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:18:39,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-03-31 23:18:39,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999485028] [2023-03-31 23:18:39,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:18:39,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 23:18:39,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:18:39,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 23:18:39,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-03-31 23:18:39,571 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:18:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:39,722 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2023-03-31 23:18:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 23:18:39,722 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 24 [2023-03-31 23:18:39,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:39,725 INFO L225 Difference]: With dead ends: 35 [2023-03-31 23:18:39,725 INFO L226 Difference]: Without dead ends: 30 [2023-03-31 23:18:39,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2023-03-31 23:18:39,727 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 19 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:18:39,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 93 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:18:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-03-31 23:18:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2023-03-31 23:18:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 23:18:39,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-03-31 23:18:39,736 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 24 [2023-03-31 23:18:39,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:39,737 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-03-31 23:18:39,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-03-31 23:18:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-03-31 23:18:39,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 23:18:39,738 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:39,738 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:18:39,744 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 23:18:39,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:39,944 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:39,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:39,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1507720734, now seen corresponding path program 1 times [2023-03-31 23:18:39,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:39,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319935855] [2023-03-31 23:18:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:39,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:39,955 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:39,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680286217] [2023-03-31 23:18:39,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:39,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:39,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:39,957 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 23:18:39,961 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 23:18:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:18:40,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 23:18:40,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:18:40,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:18:40,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:18:40,096 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:40,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319935855] [2023-03-31 23:18:40,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:40,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680286217] [2023-03-31 23:18:40,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680286217] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:18:40,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019313713] [2023-03-31 23:18:40,099 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:18:40,099 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:18:40,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:18:40,100 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:18:40,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:18:40,126 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:18:40,481 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-03-31 23:18:40,487 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:18:40,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:18:40,494 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:18:40,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '870#(and (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:18:40,838 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:18:40,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:18:40,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-03-31 23:18:40,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336248945] [2023-03-31 23:18:40,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:18:40,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 23:18:40,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:18:40,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 23:18:40,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-03-31 23:18:40,840 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-03-31 23:18:40,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:40,910 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2023-03-31 23:18:40,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 23:18:40,911 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 26 [2023-03-31 23:18:40,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:40,912 INFO L225 Difference]: With dead ends: 54 [2023-03-31 23:18:40,912 INFO L226 Difference]: Without dead ends: 49 [2023-03-31 23:18:40,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-03-31 23:18:40,913 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 23:18:40,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 71 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 23:18:40,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-03-31 23:18:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-03-31 23:18:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 23:18:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-03-31 23:18:40,925 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 26 [2023-03-31 23:18:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:40,926 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-03-31 23:18:40,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2023-03-31 23:18:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-03-31 23:18:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-03-31 23:18:40,927 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:40,927 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:18:40,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 23:18:41,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:41,129 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:41,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:41,130 INFO L85 PathProgramCache]: Analyzing trace with hash -548963225, now seen corresponding path program 2 times [2023-03-31 23:18:41,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:41,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844208883] [2023-03-31 23:18:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:41,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:41,146 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:41,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856049673] [2023-03-31 23:18:41,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:18:41,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:41,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:41,148 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 23:18:41,165 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 23:18:41,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-03-31 23:18:41,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:18:41,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2023-03-31 23:18:41,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:41,361 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:18:41,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:18:41,462 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-03-31 23:18:41,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:41,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844208883] [2023-03-31 23:18:41,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:41,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856049673] [2023-03-31 23:18:41,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856049673] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:18:41,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1011068927] [2023-03-31 23:18:41,465 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:18:41,465 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:18:41,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:18:41,466 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:18:41,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:18:41,486 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:18:41,772 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-03-31 23:18:41,777 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:18:41,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:18:41,782 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:18:42,089 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1350#(and (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:18:42,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:18:42,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:18:42,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-03-31 23:18:42,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846776523] [2023-03-31 23:18:42,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:18:42,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 23:18:42,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:18:42,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 23:18:42,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2023-03-31 23:18:42,091 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2023-03-31 23:18:42,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:42,282 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2023-03-31 23:18:42,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-03-31 23:18:42,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 50 [2023-03-31 23:18:42,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:42,284 INFO L225 Difference]: With dead ends: 102 [2023-03-31 23:18:42,284 INFO L226 Difference]: Without dead ends: 97 [2023-03-31 23:18:42,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2023-03-31 23:18:42,285 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 23:18:42,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 77 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 23:18:42,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-03-31 23:18:42,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-03-31 23:18:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-03-31 23:18:42,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-03-31 23:18:42,304 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 50 [2023-03-31 23:18:42,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:42,305 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-03-31 23:18:42,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2023-03-31 23:18:42,305 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-03-31 23:18:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 23:18:42,307 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:42,307 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:18:42,313 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 23:18:42,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:42,513 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:42,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:42,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1194371079, now seen corresponding path program 3 times [2023-03-31 23:18:42,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:42,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961567918] [2023-03-31 23:18:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:42,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:42,527 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:42,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586523573] [2023-03-31 23:18:42,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 23:18:42,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:42,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:42,529 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 23:18:42,531 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 23:18:42,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 23:18:42,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 23:18:42,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2023-03-31 23:18:42,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:18:43,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:18:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 20 proven. 200 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2023-03-31 23:18:43,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:43,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961567918] [2023-03-31 23:18:43,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:43,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586523573] [2023-03-31 23:18:43,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586523573] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:18:43,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193153340] [2023-03-31 23:18:43,337 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:18:43,338 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:18:43,338 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:18:43,338 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:18:43,338 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:18:43,363 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:18:43,628 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-03-31 23:18:43,633 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:18:43,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:18:43,637 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:18:44,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2274#(and (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:18:44,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:18:44,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:18:44,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-03-31 23:18:44,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516583437] [2023-03-31 23:18:44,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:18:44,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-31 23:18:44,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:18:44,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-31 23:18:44,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1101, Unknown=0, NotChecked=0, Total=1560 [2023-03-31 23:18:44,009 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2023-03-31 23:18:44,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:44,572 INFO L93 Difference]: Finished difference Result 198 states and 210 transitions. [2023-03-31 23:18:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-03-31 23:18:44,572 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) Word has length 98 [2023-03-31 23:18:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:44,574 INFO L225 Difference]: With dead ends: 198 [2023-03-31 23:18:44,574 INFO L226 Difference]: Without dead ends: 193 [2023-03-31 23:18:44,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=974, Invalid=2686, Unknown=0, NotChecked=0, Total=3660 [2023-03-31 23:18:44,577 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 23:18:44,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 140 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 23:18:44,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-03-31 23:18:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-03-31 23:18:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 141 states have internal predecessors, (142), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2023-03-31 23:18:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2023-03-31 23:18:44,607 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 98 [2023-03-31 23:18:44,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:44,607 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2023-03-31 23:18:44,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2023-03-31 23:18:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2023-03-31 23:18:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-03-31 23:18:44,609 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:44,610 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:18:44,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 23:18:44,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:44,816 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:44,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:44,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1896778525, now seen corresponding path program 4 times [2023-03-31 23:18:44,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:44,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724479889] [2023-03-31 23:18:44,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:44,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:44,834 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:44,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004402333] [2023-03-31 23:18:44,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 23:18:44,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:44,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:44,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:18:44,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 23:18:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 23:18:44,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 49 conjunts are in the unsatisfiable core [2023-03-31 23:18:44,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 23:18:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 23:18:45,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 23:18:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1938 backedges. 44 proven. 968 refuted. 0 times theorem prover too weak. 926 trivial. 0 not checked. [2023-03-31 23:18:46,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 23:18:46,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724479889] [2023-03-31 23:18:46,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-03-31 23:18:46,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004402333] [2023-03-31 23:18:46,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004402333] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 23:18:46,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1932484835] [2023-03-31 23:18:46,325 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-03-31 23:18:46,325 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 23:18:46,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 23:18:46,326 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 23:18:46,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 23:18:46,344 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 12 for LOIs [2023-03-31 23:18:46,601 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-03-31 23:18:46,605 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 10 for LOIs [2023-03-31 23:18:46,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2023-03-31 23:18:46,610 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 23:18:46,991 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4086#(and (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 23:18:46,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 23:18:46,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-31 23:18:46,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2023-03-31 23:18:46,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089279755] [2023-03-31 23:18:46,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-31 23:18:46,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-03-31 23:18:46,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 23:18:46,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-03-31 23:18:46,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1455, Invalid=2577, Unknown=0, NotChecked=0, Total=4032 [2023-03-31 23:18:46,997 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 50 states, 50 states have (on average 4.32) internal successors, (216), 50 states have internal predecessors, (216), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2023-03-31 23:18:48,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 23:18:48,551 INFO L93 Difference]: Finished difference Result 390 states and 414 transitions. [2023-03-31 23:18:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-03-31 23:18:48,551 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.32) internal successors, (216), 50 states have internal predecessors, (216), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) Word has length 194 [2023-03-31 23:18:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 23:18:48,554 INFO L225 Difference]: With dead ends: 390 [2023-03-31 23:18:48,555 INFO L226 Difference]: Without dead ends: 385 [2023-03-31 23:18:48,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2886 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3638, Invalid=8134, Unknown=0, NotChecked=0, Total=11772 [2023-03-31 23:18:48,563 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 236 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 23:18:48,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 205 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 23:18:48,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2023-03-31 23:18:48,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2023-03-31 23:18:48,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 285 states have (on average 1.0035087719298246) internal successors, (286), 285 states have internal predecessors, (286), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2023-03-31 23:18:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2023-03-31 23:18:48,618 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 194 [2023-03-31 23:18:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 23:18:48,619 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2023-03-31 23:18:48,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.32) internal successors, (216), 50 states have internal predecessors, (216), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2023-03-31 23:18:48,620 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2023-03-31 23:18:48,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2023-03-31 23:18:48,629 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:18:48,629 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:18:48,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 23:18:48,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-03-31 23:18:48,836 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:18:48,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:18:48,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1898635621, now seen corresponding path program 5 times [2023-03-31 23:18:48,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:18:48,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044242621] [2023-03-31 23:18:48,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:18:48,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:18:48,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-03-31 23:18:48,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516740299] [2023-03-31 23:18:48,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 23:18:48,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 23:18:48,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:18:48,874 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 23:18:48,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process