/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:16:43,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:16:43,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:16:43,098 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:16:43,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:16:43,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:16:43,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:16:43,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:16:43,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:16:43,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:16:43,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:16:43,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:16:43,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:16:43,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:16:43,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:16:43,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:16:43,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:16:43,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:16:43,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:16:43,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:16:43,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:16:43,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:16:43,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:16:43,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:16:43,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 05:16:43,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 05:16:43,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 05:16:43,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 05:16:43,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 05:16:43,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 05:16:43,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:16:43,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:16:43,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:16:43,148 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:16:43,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:16:43,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:16:43,149 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:16:43,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:16:43,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:16:43,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:16:43,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:16:43,151 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 05:16:43,180 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:16:43,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:16:43,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:16:43,180 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:16:43,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:16:43,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:16:43,181 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:16:43,182 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:16:43,182 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:16:43,182 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:16:43,182 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:16:43,183 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:16:43,183 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:16:43,183 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:16:43,183 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:16:43,183 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:16:43,183 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:16:43,183 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:16:43,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:16:43,184 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:16:43,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:16:43,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:16:43,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:16:43,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:16:43,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:16:43,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:16:43,185 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:16:43,185 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:16:43,185 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:16:43,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:16:43,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:16:43,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:16:43,186 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:16:43,186 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:16:43,186 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:16:43,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:16:43,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:16:43,187 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:16:43,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:16:43,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:16:43,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:16:43,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:16:43,430 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:16:43,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:16:43,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:16:43,466 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:16:43,468 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:16:43,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.c [2023-04-01 05:16:44,658 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:16:44,833 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:16:44,833 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound5.c [2023-04-01 05:16:44,838 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c512dcbb/3a6c770223bb471d813ec8091b985692/FLAG7242207d6 [2023-04-01 05:16:44,854 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c512dcbb/3a6c770223bb471d813ec8091b985692 [2023-04-01 05:16:44,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:16:44,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:16:44,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:16:44,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:16:44,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:16:44,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:16:44" (1/1) ... [2023-04-01 05:16:44,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ea075c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:16:44, skipping insertion in model container [2023-04-01 05:16:44,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:16:44" (1/1) ... [2023-04-01 05:16:44,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:16:44,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:16:45,030 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/egcd-ll_valuebound5.c[489,502] [2023-04-01 05:16:45,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:16:45,068 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:16:45,078 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/egcd-ll_valuebound5.c[489,502] [2023-04-01 05:16:45,097 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:16:45,108 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:16:45,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:16:45 WrapperNode [2023-04-01 05:16:45,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:16:45,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:16:45,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:16:45,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:16:45,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:16:45" (1/1) ... [2023-04-01 05:16:45,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:16:45" (1/1) ... [2023-04-01 05:16:45,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:16:45" (1/1) ... [2023-04-01 05:16:45,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:16:45" (1/1) ... [2023-04-01 05:16:45,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:16:45" (1/1) ... [2023-04-01 05:16:45,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:16:45" (1/1) ... [2023-04-01 05:16:45,150 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:16:45" (1/1) ... [2023-04-01 05:16:45,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:16:45" (1/1) ... [2023-04-01 05:16:45,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:16:45,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:16:45,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:16:45,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:16:45,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:16:45" (1/1) ... [2023-04-01 05:16:45,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:16:45,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:16:45,208 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 05:16:45,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 05:16:45,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:16:45,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:16:45,246 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:16:45,247 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 05:16:45,247 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 05:16:45,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:16:45,247 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 05:16:45,247 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:16:45,247 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:16:45,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:16:45,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 05:16:45,248 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 05:16:45,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 05:16:45,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:16:45,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:16:45,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:16:45,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:16:45,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:16:45,249 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:16:45,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:16:45,313 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:16:45,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:16:45,480 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:16:45,554 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:16:45,555 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 05:16:45,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:16:45 BoogieIcfgContainer [2023-04-01 05:16:45,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:16:45,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:16:45,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:16:45,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:16:45,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:16:44" (1/3) ... [2023-04-01 05:16:45,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe9c4b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:16:45, skipping insertion in model container [2023-04-01 05:16:45,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:16:45" (2/3) ... [2023-04-01 05:16:45,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fe9c4b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:16:45, skipping insertion in model container [2023-04-01 05:16:45,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:16:45" (3/3) ... [2023-04-01 05:16:45,564 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound5.c [2023-04-01 05:16:45,598 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:16:45,598 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 05:16:45,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:16:45,657 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;@65603154, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:16:45,658 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 05:16:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 05:16:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 05:16:45,669 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:16:45,669 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:16:45,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:16:45,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:16:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1201008584, now seen corresponding path program 1 times [2023-04-01 05:16:45,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:16:45,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693905830] [2023-04-01 05:16:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:45,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:16:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:16:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:16:45,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:16:45,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693905830] [2023-04-01 05:16:45,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693905830] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:16:45,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:16:45,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 05:16:45,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639752928] [2023-04-01 05:16:45,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:16:45,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 05:16:45,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:16:45,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 05:16:45,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:16:45,964 INFO L87 Difference]: Start difference. First operand has 32 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:16:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:16:46,018 INFO L93 Difference]: Finished difference Result 51 states and 77 transitions. [2023-04-01 05:16:46,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 05:16:46,022 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 24 [2023-04-01 05:16:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:16:46,028 INFO L225 Difference]: With dead ends: 51 [2023-04-01 05:16:46,028 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 05:16:46,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 05:16:46,036 INFO L413 NwaCegarLoop]: 37 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, 37 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 [2023-04-01 05:16:46,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:16:46,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 05:16:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 05:16:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 05:16:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-04-01 05:16:46,089 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 24 [2023-04-01 05:16:46,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:16:46,090 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-04-01 05:16:46,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:16:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-04-01 05:16:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 05:16:46,094 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:16:46,094 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:16:46,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:16:46,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:16:46,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:16:46,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1269527884, now seen corresponding path program 1 times [2023-04-01 05:16:46,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:16:46,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631222683] [2023-04-01 05:16:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:46,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:16:46,139 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:16:46,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779948082] [2023-04-01 05:16:46,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:46,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:46,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:16:46,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:16:46,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 05:16:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:16:46,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 05:16:46,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:16:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 05:16:46,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:16:46,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:16:46,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631222683] [2023-04-01 05:16:46,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:16:46,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779948082] [2023-04-01 05:16:46,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779948082] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:16:46,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:16:46,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 05:16:46,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17146465] [2023-04-01 05:16:46,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:16:46,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:16:46,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:16:46,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:16:46,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:16:46,352 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:16:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:16:46,476 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2023-04-01 05:16:46,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 05:16:46,483 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 24 [2023-04-01 05:16:46,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:16:46,486 INFO L225 Difference]: With dead ends: 43 [2023-04-01 05:16:46,486 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 05:16:46,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-01 05:16:46,489 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:16:46,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 101 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:16:46,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 05:16:46,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-04-01 05:16:46,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-01 05:16:46,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2023-04-01 05:16:46,508 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 24 [2023-04-01 05:16:46,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:16:46,508 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2023-04-01 05:16:46,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-01 05:16:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2023-04-01 05:16:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 05:16:46,510 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:16:46,510 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:16:46,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 05:16:46,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:46,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:16:46,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:16:46,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1521017309, now seen corresponding path program 1 times [2023-04-01 05:16:46,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:16:46,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659888537] [2023-04-01 05:16:46,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:46,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:16:46,737 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:16:46,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815400506] [2023-04-01 05:16:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:46,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:46,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:16:46,748 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:16:46,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 05:16:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:16:46,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-01 05:16:46,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:16:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 05:16:46,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:16:47,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:16:47,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659888537] [2023-04-01 05:16:47,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:16:47,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815400506] [2023-04-01 05:16:47,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815400506] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:16:47,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [599070331] [2023-04-01 05:16:47,055 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-04-01 05:16:47,056 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:16:47,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:16:47,063 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:16:47,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:16:47,118 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:16:47,469 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-01 05:16:47,474 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 05:16:47,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:16:47,483 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:16:47,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [599070331] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:16:47,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 05:16:47,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7] total 20 [2023-04-01 05:16:47,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121480456] [2023-04-01 05:16:47,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:16:47,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 05:16:47,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:16:47,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 05:16:47,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-04-01 05:16:47,830 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand has 15 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 05:16:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:16:48,878 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2023-04-01 05:16:48,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 05:16:48,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2023-04-01 05:16:48,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:16:48,881 INFO L225 Difference]: With dead ends: 47 [2023-04-01 05:16:48,881 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 05:16:48,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 05:16:48,884 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:16:48,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 5 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:16:48,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 05:16:48,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-04-01 05:16:48,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-01 05:16:48,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2023-04-01 05:16:48,909 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 29 [2023-04-01 05:16:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:16:48,910 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2023-04-01 05:16:48,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 7 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 05:16:48,911 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2023-04-01 05:16:48,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 05:16:48,912 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:16:48,912 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:16:48,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 05:16:49,117 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,SelfDestructingSolverStorable2 [2023-04-01 05:16:49,118 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:16:49,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:16:49,118 INFO L85 PathProgramCache]: Analyzing trace with hash -109978194, now seen corresponding path program 1 times [2023-04-01 05:16:49,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:16:49,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898493918] [2023-04-01 05:16:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:49,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:16:49,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:16:49,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [454260494] [2023-04-01 05:16:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:49,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:49,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:16:49,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:16:49,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 05:16:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:16:49,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 05:16:49,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:16:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 05:16:49,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 05:16:49,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:16:49,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898493918] [2023-04-01 05:16:49,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:16:49,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454260494] [2023-04-01 05:16:49,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454260494] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:16:49,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:16:49,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 05:16:49,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675655542] [2023-04-01 05:16:49,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:16:49,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 05:16:49,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:16:49,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 05:16:49,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 05:16:49,213 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-01 05:16:49,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:16:49,256 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2023-04-01 05:16:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 05:16:49,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 40 [2023-04-01 05:16:49,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:16:49,260 INFO L225 Difference]: With dead ends: 49 [2023-04-01 05:16:49,260 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 05:16:49,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 05:16:49,261 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:16:49,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 110 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:16:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 05:16:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-04-01 05:16:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-01 05:16:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2023-04-01 05:16:49,277 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 40 [2023-04-01 05:16:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:16:49,277 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2023-04-01 05:16:49,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2023-04-01 05:16:49,277 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2023-04-01 05:16:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-01 05:16:49,278 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:16:49,278 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:16:49,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 05:16:49,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:49,485 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:16:49,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:16:49,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1626365341, now seen corresponding path program 1 times [2023-04-01 05:16:49,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:16:49,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458635214] [2023-04-01 05:16:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:49,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:16:49,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:16:49,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122856566] [2023-04-01 05:16:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:49,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:49,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:16:49,500 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:16:49,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 05:16:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:16:49,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 05:16:49,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:16:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 05:16:49,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:16:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-04-01 05:16:49,890 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:16:49,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458635214] [2023-04-01 05:16:49,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:16:49,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122856566] [2023-04-01 05:16:49,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122856566] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:16:49,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1280842562] [2023-04-01 05:16:49,894 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 05:16:49,894 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:16:49,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:16:49,895 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:16:49,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:16:49,913 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:16:51,097 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:16:51,101 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 05:16:51,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:16:51,105 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:16:51,586 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1191#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:16:51,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:16:51,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:16:51,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2023-04-01 05:16:51,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543785761] [2023-04-01 05:16:51,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:16:51,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:16:51,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:16:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:16:51,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2023-04-01 05:16:51,588 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-04-01 05:16:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:16:51,794 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2023-04-01 05:16:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 05:16:51,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 41 [2023-04-01 05:16:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:16:51,796 INFO L225 Difference]: With dead ends: 62 [2023-04-01 05:16:51,796 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 05:16:51,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-04-01 05:16:51,797 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 05:16:51,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 121 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 05:16:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 05:16:51,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2023-04-01 05:16:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 25 states have (on average 1.12) internal successors, (28), 27 states have internal predecessors, (28), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-04-01 05:16:51,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-04-01 05:16:51,813 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 41 [2023-04-01 05:16:51,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:16:51,814 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-04-01 05:16:51,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-04-01 05:16:51,814 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-04-01 05:16:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 05:16:51,815 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:16:51,815 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:16:51,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 05:16:52,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:52,021 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:16:52,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:16:52,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1565532503, now seen corresponding path program 1 times [2023-04-01 05:16:52,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:16:52,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139549568] [2023-04-01 05:16:52,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:52,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:16:52,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:16:52,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350108389] [2023-04-01 05:16:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:52,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:52,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:16:52,035 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 05:16:52,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 05:16:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:16:52,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 05:16:52,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:16:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 05:16:52,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:16:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 05:16:52,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:16:52,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139549568] [2023-04-01 05:16:52,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:16:52,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350108389] [2023-04-01 05:16:52,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350108389] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:16:52,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [643138612] [2023-04-01 05:16:52,241 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 05:16:52,241 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:16:52,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:16:52,241 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:16:52,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:16:52,256 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:16:52,459 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 11 for LOIs [2023-04-01 05:16:52,462 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 05:16:52,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:16:52,471 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:16:52,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [643138612] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:16:52,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:16:52,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [9, 8] total 26 [2023-04-01 05:16:52,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77201609] [2023-04-01 05:16:52,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:16:52,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 05:16:52,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:16:52,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 05:16:52,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2023-04-01 05:16:52,813 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 16 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-01 05:16:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:16:53,858 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2023-04-01 05:16:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 05:16:53,865 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 45 [2023-04-01 05:16:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:16:53,868 INFO L225 Difference]: With dead ends: 61 [2023-04-01 05:16:53,868 INFO L226 Difference]: Without dead ends: 49 [2023-04-01 05:16:53,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2023-04-01 05:16:53,871 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:16:53,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 10 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 05:16:53,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-04-01 05:16:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-04-01 05:16:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-04-01 05:16:53,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-04-01 05:16:53,884 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 45 [2023-04-01 05:16:53,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:16:53,885 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-04-01 05:16:53,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-01 05:16:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-04-01 05:16:53,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 05:16:53,887 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:16:53,887 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:16:53,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 05:16:54,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:54,093 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:16:54,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:16:54,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1584235564, now seen corresponding path program 2 times [2023-04-01 05:16:54,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:16:54,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110157967] [2023-04-01 05:16:54,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:54,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:16:54,110 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:16:54,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097152204] [2023-04-01 05:16:54,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 05:16:54,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:54,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:16:54,119 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) [2023-04-01 05:16:54,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 05:16:54,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 05:16:54,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:16:54,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 05:16:54,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:16:54,405 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-04-01 05:16:54,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:16:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 05:16:54,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:16:54,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110157967] [2023-04-01 05:16:54,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:16:54,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097152204] [2023-04-01 05:16:54,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097152204] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:16:54,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [690245851] [2023-04-01 05:16:54,613 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 05:16:54,613 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:16:54,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:16:54,614 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:16:54,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:16:54,637 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:16:55,581 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:16:55,585 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 05:16:55,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:16:55,589 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:16:56,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2153#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:16:56,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:16:56,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:16:56,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2023-04-01 05:16:56,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411016154] [2023-04-01 05:16:56,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:16:56,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:16:56,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:16:56,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:16:56,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2023-04-01 05:16:56,333 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-01 05:16:57,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:16:57,579 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2023-04-01 05:16:57,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 05:16:57,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 46 [2023-04-01 05:16:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:16:57,581 INFO L225 Difference]: With dead ends: 73 [2023-04-01 05:16:57,581 INFO L226 Difference]: Without dead ends: 71 [2023-04-01 05:16:57,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-04-01 05:16:57,582 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 05:16:57,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 123 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 05:16:57,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-04-01 05:16:57,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2023-04-01 05:16:57,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 31 states have (on average 1.096774193548387) internal successors, (34), 33 states have internal predecessors, (34), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-01 05:16:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-04-01 05:16:57,607 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 46 [2023-04-01 05:16:57,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:16:57,607 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-04-01 05:16:57,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2023-04-01 05:16:57,608 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-04-01 05:16:57,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 05:16:57,608 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:16:57,608 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:16:57,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 05:16:57,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:57,815 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:16:57,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:16:57,815 INFO L85 PathProgramCache]: Analyzing trace with hash -320866109, now seen corresponding path program 3 times [2023-04-01 05:16:57,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:16:57,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63844464] [2023-04-01 05:16:57,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:16:57,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:16:57,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:16:57,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89286291] [2023-04-01 05:16:57,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 05:16:57,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:16:57,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:16:57,863 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) [2023-04-01 05:16:57,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 05:16:57,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 05:16:57,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 05:16:57,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2023-04-01 05:16:57,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:16:58,235 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-04-01 05:16:58,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:16:58,505 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 5 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-04-01 05:16:58,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:16:58,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63844464] [2023-04-01 05:16:58,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:16:58,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89286291] [2023-04-01 05:16:58,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89286291] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:16:58,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1785863589] [2023-04-01 05:16:58,508 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 05:16:58,508 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:16:58,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:16:58,508 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:16:58,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:16:58,521 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:16:59,337 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:16:59,341 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 05:16:59,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:16:59,344 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:17:00,235 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2705#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:17:00,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:17:00,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:17:00,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2023-04-01 05:17:00,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478349324] [2023-04-01 05:17:00,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:17:00,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-01 05:17:00,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:17:00,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-01 05:17:00,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2023-04-01 05:17:00,239 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) [2023-04-01 05:17:02,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:17:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:17:02,831 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2023-04-01 05:17:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 05:17:02,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) Word has length 51 [2023-04-01 05:17:02,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:17:02,833 INFO L225 Difference]: With dead ends: 79 [2023-04-01 05:17:02,833 INFO L226 Difference]: Without dead ends: 73 [2023-04-01 05:17:02,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 117 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 05:17:02,834 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 05:17:02,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 122 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 343 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-04-01 05:17:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-01 05:17:02,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-04-01 05:17:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 19 states have call successors, (19), 12 states have call predecessors, (19), 11 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-01 05:17:02,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2023-04-01 05:17:02,852 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 51 [2023-04-01 05:17:02,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:17:02,853 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2023-04-01 05:17:02,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) [2023-04-01 05:17:02,853 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2023-04-01 05:17:02,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 05:17:02,854 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:17:02,854 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:17:02,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 05:17:03,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:17:03,056 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:17:03,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:17:03,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1141095002, now seen corresponding path program 1 times [2023-04-01 05:17:03,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:17:03,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527439885] [2023-04-01 05:17:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:17:03,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:17:03,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:17:03,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107739033] [2023-04-01 05:17:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:17:03,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:17:03,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:17:03,070 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) [2023-04-01 05:17:03,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 05:17:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:17:03,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 05:17:03,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:17:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 05:17:03,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:17:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-04-01 05:17:03,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:17:03,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527439885] [2023-04-01 05:17:03,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:17:03,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107739033] [2023-04-01 05:17:03,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107739033] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:17:03,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1596219845] [2023-04-01 05:17:03,313 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-04-01 05:17:03,313 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:17:03,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:17:03,313 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:17:03,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:17:03,325 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:17:04,128 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:17:04,132 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 05:17:04,133 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:17:04,136 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:17:05,068 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3335#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:17:05,068 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:17:05,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:17:05,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2023-04-01 05:17:05,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771606706] [2023-04-01 05:17:05,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:17:05,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 05:17:05,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:17:05,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 05:17:05,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2023-04-01 05:17:05,070 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-01 05:17:05,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:17:05,237 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2023-04-01 05:17:05,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 05:17:05,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 62 [2023-04-01 05:17:05,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:17:05,238 INFO L225 Difference]: With dead ends: 81 [2023-04-01 05:17:05,238 INFO L226 Difference]: Without dead ends: 69 [2023-04-01 05:17:05,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 151 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-04-01 05:17:05,239 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 05:17:05,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 114 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 05:17:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-04-01 05:17:05,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-04-01 05:17:05,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-04-01 05:17:05,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2023-04-01 05:17:05,256 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 62 [2023-04-01 05:17:05,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:17:05,257 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2023-04-01 05:17:05,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2023-04-01 05:17:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2023-04-01 05:17:05,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-04-01 05:17:05,258 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:17:05,258 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:17:05,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-04-01 05:17:05,463 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,SelfDestructingSolverStorable8 [2023-04-01 05:17:05,464 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:17:05,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:17:05,464 INFO L85 PathProgramCache]: Analyzing trace with hash 834324404, now seen corresponding path program 4 times [2023-04-01 05:17:05,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:17:05,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501702657] [2023-04-01 05:17:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:17:05,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:17:05,478 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-01 05:17:05,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619983088] [2023-04-01 05:17:05,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 05:17:05,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:17:05,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:17:05,479 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) [2023-04-01 05:17:05,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 05:17:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:17:05,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 51 conjunts are in the unsatisfiable core [2023-04-01 05:17:05,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:17:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 65 proven. 30 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2023-04-01 05:17:08,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:17:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 63 proven. 29 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-04-01 05:17:16,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:17:16,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501702657] [2023-04-01 05:17:16,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-01 05:17:16,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619983088] [2023-04-01 05:17:16,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619983088] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:17:16,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1229018425] [2023-04-01 05:17:16,609 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-04-01 05:17:16,609 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:17:16,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:17:16,610 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:17:16,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:17:16,628 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:17:17,418 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2023-04-01 05:17:17,421 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 9 for LOIs [2023-04-01 05:17:17,421 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:17:17,423 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:17:28,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4073#(and (<= 1 |#StackHeapBarrier|) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:17:28,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:17:28,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 05:17:28,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2023-04-01 05:17:28,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086478456] [2023-04-01 05:17:28,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 05:17:28,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 05:17:28,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:17:28,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 05:17:28,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 05:17:28,287 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 14 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2023-04-01 05:17:33,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-01 05:17:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:17:34,077 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2023-04-01 05:17:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 05:17:34,078 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 14 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) Word has length 80 [2023-04-01 05:17:34,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:17:34,078 INFO L225 Difference]: With dead ends: 86 [2023-04-01 05:17:34,078 INFO L226 Difference]: Without dead ends: 0 [2023-04-01 05:17:34,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 186 SyntacticMatches, 20 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=236, Invalid=1486, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 05:17:34,080 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 05:17:34,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 142 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 455 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2023-04-01 05:17:34,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-01 05:17:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-01 05:17:34,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-01 05:17:34,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-01 05:17:34,081 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2023-04-01 05:17:34,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:17:34,081 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-01 05:17:34,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 14 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2023-04-01 05:17:34,082 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-01 05:17:34,082 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-01 05:17:34,084 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 05:17:34,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 05:17:34,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 05:17:34,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.