./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 02:05:12,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 02:05:12,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 02:05:12,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 02:05:12,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 02:05:12,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 02:05:12,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 02:05:12,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 02:05:12,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 02:05:12,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 02:05:12,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 02:05:12,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 02:05:12,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 02:05:12,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 02:05:12,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 02:05:12,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 02:05:12,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 02:05:12,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 02:05:12,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 02:05:12,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 02:05:12,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 02:05:12,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 02:05:12,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 02:05:12,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 02:05:12,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 02:05:12,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 02:05:12,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 02:05:12,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 02:05:12,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 02:05:12,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 02:05:12,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 02:05:12,181 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 02:05:12,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 02:05:12,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 02:05:12,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 02:05:12,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 02:05:12,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 02:05:12,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 02:05:12,184 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 02:05:12,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 02:05:12,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 02:05:12,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 02:05:12,211 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 02:05:12,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 02:05:12,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 02:05:12,212 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 02:05:12,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 02:05:12,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 02:05:12,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 02:05:12,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 02:05:12,213 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 02:05:12,213 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 02:05:12,214 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 02:05:12,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 02:05:12,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 02:05:12,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 02:05:12,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 02:05:12,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 02:05:12,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 02:05:12,215 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 02:05:12,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 02:05:12,215 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 02:05:12,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 02:05:12,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 02:05:12,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 02:05:12,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 02:05:12,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:05:12,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 02:05:12,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 02:05:12,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 02:05:12,217 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 02:05:12,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 02:05:12,217 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 02:05:12,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 02:05:12,217 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 02:05:12,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 02:05:12,218 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 02:05:12,218 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e [2023-02-16 02:05:12,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 02:05:12,419 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 02:05:12,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 02:05:12,421 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 02:05:12,422 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 02:05:12,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2023-02-16 02:05:13,432 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 02:05:13,575 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 02:05:13,575 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2023-02-16 02:05:13,580 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/784592733/a4d431e63f8d496b9101547c7950464d/FLAG1dca0d2d3 [2023-02-16 02:05:13,592 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/784592733/a4d431e63f8d496b9101547c7950464d [2023-02-16 02:05:13,594 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 02:05:13,595 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 02:05:13,597 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 02:05:13,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 02:05:13,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 02:05:13,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:05:13" (1/1) ... [2023-02-16 02:05:13,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f000a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13, skipping insertion in model container [2023-02-16 02:05:13,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 02:05:13" (1/1) ... [2023-02-16 02:05:13,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 02:05:13,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 02:05:13,732 WARN L237 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/egcd3-ll_valuebound100.c[490,503] [2023-02-16 02:05:13,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:05:13,772 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 02:05:13,780 WARN L237 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/egcd3-ll_valuebound100.c[490,503] [2023-02-16 02:05:13,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 02:05:13,807 INFO L208 MainTranslator]: Completed translation [2023-02-16 02:05:13,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13 WrapperNode [2023-02-16 02:05:13,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 02:05:13,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 02:05:13,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 02:05:13,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 02:05:13,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13" (1/1) ... [2023-02-16 02:05:13,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13" (1/1) ... [2023-02-16 02:05:13,828 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2023-02-16 02:05:13,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 02:05:13,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 02:05:13,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 02:05:13,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 02:05:13,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13" (1/1) ... [2023-02-16 02:05:13,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13" (1/1) ... [2023-02-16 02:05:13,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13" (1/1) ... [2023-02-16 02:05:13,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13" (1/1) ... [2023-02-16 02:05:13,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13" (1/1) ... [2023-02-16 02:05:13,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13" (1/1) ... [2023-02-16 02:05:13,842 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13" (1/1) ... [2023-02-16 02:05:13,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13" (1/1) ... [2023-02-16 02:05:13,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 02:05:13,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 02:05:13,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 02:05:13,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 02:05:13,845 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13" (1/1) ... [2023-02-16 02:05:13,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 02:05:13,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:05:13,871 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) [2023-02-16 02:05:13,879 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 [2023-02-16 02:05:13,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 02:05:13,897 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-16 02:05:13,897 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-16 02:05:13,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 02:05:13,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 02:05:13,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 02:05:13,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 02:05:13,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 02:05:13,936 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 02:05:13,937 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 02:05:14,076 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 02:05:14,080 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 02:05:14,080 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 02:05:14,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:05:14 BoogieIcfgContainer [2023-02-16 02:05:14,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 02:05:14,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 02:05:14,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 02:05:14,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 02:05:14,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 02:05:13" (1/3) ... [2023-02-16 02:05:14,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ffc8db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:05:14, skipping insertion in model container [2023-02-16 02:05:14,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 02:05:13" (2/3) ... [2023-02-16 02:05:14,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8ffc8db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 02:05:14, skipping insertion in model container [2023-02-16 02:05:14,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 02:05:14" (3/3) ... [2023-02-16 02:05:14,086 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2023-02-16 02:05:14,097 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 02:05:14,098 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 02:05:14,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 02:05:14,164 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=PETRI_NET, 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;@4065ee92, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 02:05:14,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 02:05:14,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-16 02:05:14,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-16 02:05:14,173 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:05:14,174 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:05:14,174 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:05:14,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:05:14,178 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2023-02-16 02:05:14,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:05:14,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936411635] [2023-02-16 02:05:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:14,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:05:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:05:14,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:05:14,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936411635] [2023-02-16 02:05:14,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 02:05:14,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695225182] [2023-02-16 02:05:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:14,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:14,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:05:14,322 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) [2023-02-16 02:05:14,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 02:05:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:05:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-16 02:05:14,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:05:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 02:05:14,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:05:14,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695225182] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:05:14,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:05:14,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 02:05:14,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874106344] [2023-02-16 02:05:14,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:05:14,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 02:05:14,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:05:14,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 02:05:14,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 02:05:14,458 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 02:05:14,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:05:14,483 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2023-02-16 02:05:14,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 02:05:14,484 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-02-16 02:05:14,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:05:14,489 INFO L225 Difference]: With dead ends: 67 [2023-02-16 02:05:14,489 INFO L226 Difference]: Without dead ends: 31 [2023-02-16 02:05:14,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 02:05:14,495 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:05:14,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:05:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-16 02:05:14,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-16 02:05:14,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 02:05:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2023-02-16 02:05:14,525 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2023-02-16 02:05:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:05:14,526 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2023-02-16 02:05:14,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 02:05:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-02-16 02:05:14,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-16 02:05:14,529 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:05:14,529 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:05:14,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 02:05:14,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-16 02:05:14,734 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:05:14,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:05:14,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2023-02-16 02:05:14,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:05:14,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64041992] [2023-02-16 02:05:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:14,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:05:14,760 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:05:14,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531348897] [2023-02-16 02:05:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:14,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:14,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:05:14,761 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) [2023-02-16 02:05:14,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 02:05:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:05:14,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 02:05:14,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:05:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:05:14,864 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:05:14,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:05:14,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64041992] [2023-02-16 02:05:14,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:05:14,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531348897] [2023-02-16 02:05:14,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531348897] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:05:14,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:05:14,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 02:05:14,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014694952] [2023-02-16 02:05:14,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:05:14,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 02:05:14,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:05:14,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 02:05:14,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-16 02:05:14,868 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-16 02:05:14,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:05:14,970 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2023-02-16 02:05:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 02:05:14,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-02-16 02:05:14,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:05:14,971 INFO L225 Difference]: With dead ends: 50 [2023-02-16 02:05:14,971 INFO L226 Difference]: Without dead ends: 43 [2023-02-16 02:05:14,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-16 02:05:14,977 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:05:14,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 113 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:05:14,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-16 02:05:14,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2023-02-16 02:05:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-16 02:05:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-16 02:05:14,984 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2023-02-16 02:05:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:05:14,984 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-16 02:05:14,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-16 02:05:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-16 02:05:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-16 02:05:14,986 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:05:14,986 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:05:14,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 02:05:15,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-16 02:05:15,189 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:05:15,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:05:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2023-02-16 02:05:15,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:05:15,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28124158] [2023-02-16 02:05:15,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:15,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:05:15,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:05:15,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346972223] [2023-02-16 02:05:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:15,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:15,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:05:15,203 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) [2023-02-16 02:05:15,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 02:05:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:05:15,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 02:05:15,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:05:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:05:15,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 02:05:15,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:05:15,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28124158] [2023-02-16 02:05:15,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:05:15,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346972223] [2023-02-16 02:05:15,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346972223] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 02:05:15,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 02:05:15,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-16 02:05:15,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678600305] [2023-02-16 02:05:15,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:05:15,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 02:05:15,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:05:15,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 02:05:15,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-16 02:05:15,348 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-16 02:05:15,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:05:15,421 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2023-02-16 02:05:15,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 02:05:15,422 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2023-02-16 02:05:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:05:15,422 INFO L225 Difference]: With dead ends: 49 [2023-02-16 02:05:15,422 INFO L226 Difference]: Without dead ends: 47 [2023-02-16 02:05:15,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-16 02:05:15,423 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:05:15,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 161 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:05:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-16 02:05:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2023-02-16 02:05:15,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-16 02:05:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-16 02:05:15,430 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2023-02-16 02:05:15,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:05:15,431 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-16 02:05:15,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-16 02:05:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-16 02:05:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-16 02:05:15,432 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:05:15,432 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:05:15,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 02:05:15,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:15,637 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:05:15,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:05:15,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2023-02-16 02:05:15,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:05:15,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185195254] [2023-02-16 02:05:15,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:15,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:05:15,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:05:15,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634090473] [2023-02-16 02:05:15,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:15,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:15,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:05:15,656 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) [2023-02-16 02:05:15,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 02:05:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:05:15,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-16 02:05:15,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:05:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:05:15,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:05:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 02:05:15,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:05:15,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185195254] [2023-02-16 02:05:15,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:05:15,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634090473] [2023-02-16 02:05:15,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634090473] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:05:15,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:05:15,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-16 02:05:15,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061410864] [2023-02-16 02:05:15,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:05:15,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 02:05:15,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:05:15,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 02:05:15,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-16 02:05:15,893 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 02:05:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:05:16,092 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2023-02-16 02:05:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 02:05:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-02-16 02:05:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:05:16,094 INFO L225 Difference]: With dead ends: 99 [2023-02-16 02:05:16,094 INFO L226 Difference]: Without dead ends: 92 [2023-02-16 02:05:16,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-16 02:05:16,095 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 02:05:16,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 242 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 02:05:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-16 02:05:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2023-02-16 02:05:16,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-16 02:05:16,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2023-02-16 02:05:16,107 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2023-02-16 02:05:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:05:16,108 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2023-02-16 02:05:16,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-16 02:05:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2023-02-16 02:05:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-16 02:05:16,109 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:05:16,109 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1] [2023-02-16 02:05:16,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 02:05:16,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:16,314 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:05:16,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:05:16,316 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2023-02-16 02:05:16,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:05:16,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126197077] [2023-02-16 02:05:16,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:16,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:05:16,331 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:05:16,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626304645] [2023-02-16 02:05:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:16,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:16,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:05:16,333 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) [2023-02-16 02:05:16,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 02:05:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:05:16,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 02:05:16,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:05:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 02:05:16,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:05:16,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:05:16,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126197077] [2023-02-16 02:05:16,537 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:05:16,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626304645] [2023-02-16 02:05:16,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626304645] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:05:16,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 02:05:16,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-16 02:05:16,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953605666] [2023-02-16 02:05:16,537 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 02:05:16,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-16 02:05:16,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:05:16,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-16 02:05:16,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-16 02:05:16,538 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 02:05:16,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:05:16,611 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2023-02-16 02:05:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 02:05:16,613 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-02-16 02:05:16,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:05:16,613 INFO L225 Difference]: With dead ends: 75 [2023-02-16 02:05:16,613 INFO L226 Difference]: Without dead ends: 73 [2023-02-16 02:05:16,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-16 02:05:16,614 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:05:16,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:05:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-16 02:05:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-02-16 02:05:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-16 02:05:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2023-02-16 02:05:16,623 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2023-02-16 02:05:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:05:16,623 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2023-02-16 02:05:16,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-16 02:05:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2023-02-16 02:05:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-16 02:05:16,624 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:05:16,624 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:05:16,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-16 02:05:16,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:16,828 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:05:16,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:05:16,829 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2023-02-16 02:05:16,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:05:16,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977195956] [2023-02-16 02:05:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:16,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:05:16,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:05:16,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731951995] [2023-02-16 02:05:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:16,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:16,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:05:16,840 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) [2023-02-16 02:05:16,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 02:05:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:05:16,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-16 02:05:16,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:05:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-16 02:05:17,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:05:17,276 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 02:05:17,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:05:17,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977195956] [2023-02-16 02:05:17,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:05:17,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731951995] [2023-02-16 02:05:17,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731951995] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:05:17,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:05:17,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2023-02-16 02:05:17,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024440552] [2023-02-16 02:05:17,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:05:17,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 02:05:17,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:05:17,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 02:05:17,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2023-02-16 02:05:17,281 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-16 02:05:17,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:05:17,654 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2023-02-16 02:05:17,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 02:05:17,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 38 [2023-02-16 02:05:17,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:05:17,656 INFO L225 Difference]: With dead ends: 114 [2023-02-16 02:05:17,656 INFO L226 Difference]: Without dead ends: 112 [2023-02-16 02:05:17,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-02-16 02:05:17,657 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 96 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:05:17,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 312 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:05:17,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-16 02:05:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 101. [2023-02-16 02:05:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-16 02:05:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2023-02-16 02:05:17,713 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2023-02-16 02:05:17,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:05:17,715 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2023-02-16 02:05:17,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-16 02:05:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2023-02-16 02:05:17,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-16 02:05:17,719 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:05:17,719 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2023-02-16 02:05:17,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 02:05:17,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:17,920 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:05:17,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:05:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2023-02-16 02:05:17,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:05:17,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864808681] [2023-02-16 02:05:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:17,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:05:17,929 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:05:17,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644461384] [2023-02-16 02:05:17,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:17,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:17,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:05:17,931 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) [2023-02-16 02:05:17,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 02:05:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:05:17,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-16 02:05:17,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:05:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-16 02:05:18,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:05:22,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:05:22,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864808681] [2023-02-16 02:05:22,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:05:22,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644461384] [2023-02-16 02:05:22,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644461384] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:05:22,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 02:05:22,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-16 02:05:22,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854590882] [2023-02-16 02:05:22,234 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 02:05:22,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 02:05:22,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:05:22,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 02:05:22,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2023-02-16 02:05:22,235 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 02:05:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:05:22,465 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2023-02-16 02:05:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 02:05:22,465 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2023-02-16 02:05:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:05:22,466 INFO L225 Difference]: With dead ends: 114 [2023-02-16 02:05:22,466 INFO L226 Difference]: Without dead ends: 112 [2023-02-16 02:05:22,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=55, Invalid=250, Unknown=1, NotChecked=0, Total=306 [2023-02-16 02:05:22,467 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:05:22,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 156 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:05:22,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-16 02:05:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2023-02-16 02:05:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2023-02-16 02:05:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2023-02-16 02:05:22,481 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 43 [2023-02-16 02:05:22,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:05:22,481 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2023-02-16 02:05:22,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-16 02:05:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2023-02-16 02:05:22,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-16 02:05:22,482 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:05:22,482 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-02-16 02:05:22,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 02:05:22,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:22,687 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:05:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:05:22,687 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2023-02-16 02:05:22,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:05:22,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768293301] [2023-02-16 02:05:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:22,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:05:22,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:05:22,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560106638] [2023-02-16 02:05:22,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:22,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:22,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:05:22,705 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) [2023-02-16 02:05:22,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 02:05:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:05:22,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 02:05:22,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:05:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 02:05:22,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:05:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-16 02:05:22,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:05:22,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768293301] [2023-02-16 02:05:22,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:05:22,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560106638] [2023-02-16 02:05:22,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560106638] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:05:22,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:05:22,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-02-16 02:05:22,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903996952] [2023-02-16 02:05:22,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:05:22,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-16 02:05:22,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:05:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-16 02:05:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-16 02:05:22,950 INFO L87 Difference]: Start difference. First operand 111 states and 151 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-16 02:05:23,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:05:23,672 INFO L93 Difference]: Finished difference Result 182 states and 255 transitions. [2023-02-16 02:05:23,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 02:05:23,672 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2023-02-16 02:05:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:05:23,674 INFO L225 Difference]: With dead ends: 182 [2023-02-16 02:05:23,674 INFO L226 Difference]: Without dead ends: 180 [2023-02-16 02:05:23,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-02-16 02:05:23,675 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 103 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 02:05:23,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 233 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 02:05:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-02-16 02:05:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 171. [2023-02-16 02:05:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 110 states have (on average 1.2636363636363637) internal successors, (139), 116 states have internal predecessors, (139), 53 states have call successors, (53), 7 states have call predecessors, (53), 7 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2023-02-16 02:05:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 244 transitions. [2023-02-16 02:05:23,705 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 244 transitions. Word has length 43 [2023-02-16 02:05:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:05:23,706 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 244 transitions. [2023-02-16 02:05:23,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-16 02:05:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 244 transitions. [2023-02-16 02:05:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-16 02:05:23,706 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:05:23,707 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-02-16 02:05:23,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 02:05:23,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-16 02:05:23,911 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:05:23,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:05:23,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2023-02-16 02:05:23,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:05:23,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85226743] [2023-02-16 02:05:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:23,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:05:23,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:05:23,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241647095] [2023-02-16 02:05:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:23,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:23,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:05:23,921 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) [2023-02-16 02:05:23,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 02:05:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:05:23,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-16 02:05:23,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:05:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-16 02:05:23,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:05:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-16 02:05:24,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:05:24,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85226743] [2023-02-16 02:05:24,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:05:24,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241647095] [2023-02-16 02:05:24,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241647095] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-16 02:05:24,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-16 02:05:24,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2023-02-16 02:05:24,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819852314] [2023-02-16 02:05:24,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 02:05:24,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 02:05:24,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:05:24,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 02:05:24,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-16 02:05:24,034 INFO L87 Difference]: Start difference. First operand 171 states and 244 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-16 02:05:24,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:05:24,087 INFO L93 Difference]: Finished difference Result 178 states and 250 transitions. [2023-02-16 02:05:24,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 02:05:24,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-02-16 02:05:24,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:05:24,089 INFO L225 Difference]: With dead ends: 178 [2023-02-16 02:05:24,089 INFO L226 Difference]: Without dead ends: 176 [2023-02-16 02:05:24,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-16 02:05:24,090 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:05:24,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 02:05:24,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-02-16 02:05:24,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2023-02-16 02:05:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 113 states have (on average 1.2566371681415929) internal successors, (142), 119 states have internal predecessors, (142), 53 states have call successors, (53), 8 states have call predecessors, (53), 8 states have return successors, (52), 47 states have call predecessors, (52), 52 states have call successors, (52) [2023-02-16 02:05:24,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 247 transitions. [2023-02-16 02:05:24,117 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 247 transitions. Word has length 48 [2023-02-16 02:05:24,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:05:24,117 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 247 transitions. [2023-02-16 02:05:24,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-16 02:05:24,118 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 247 transitions. [2023-02-16 02:05:24,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-16 02:05:24,118 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:05:24,119 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:05:24,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 02:05:24,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:24,323 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:05:24,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:05:24,324 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2023-02-16 02:05:24,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:05:24,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791847740] [2023-02-16 02:05:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:24,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:05:24,342 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:05:24,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042494407] [2023-02-16 02:05:24,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:24,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:24,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:05:24,347 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:05:24,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 02:05:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:05:24,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-16 02:05:24,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:05:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-16 02:05:24,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:05:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-16 02:05:25,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:05:25,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791847740] [2023-02-16 02:05:25,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:05:25,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042494407] [2023-02-16 02:05:25,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042494407] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:05:25,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:05:25,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-02-16 02:05:25,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95780975] [2023-02-16 02:05:25,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:05:25,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-16 02:05:25,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:05:25,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-16 02:05:25,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-02-16 02:05:25,776 INFO L87 Difference]: Start difference. First operand 175 states and 247 transitions. Second operand has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-16 02:05:37,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:05:37,139 INFO L93 Difference]: Finished difference Result 437 states and 636 transitions. [2023-02-16 02:05:37,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-16 02:05:37,141 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 60 [2023-02-16 02:05:37,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:05:37,143 INFO L225 Difference]: With dead ends: 437 [2023-02-16 02:05:37,144 INFO L226 Difference]: Without dead ends: 346 [2023-02-16 02:05:37,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=523, Invalid=2447, Unknown=0, NotChecked=0, Total=2970 [2023-02-16 02:05:37,148 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 171 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-02-16 02:05:37,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 229 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-02-16 02:05:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-02-16 02:05:37,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 284. [2023-02-16 02:05:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 188 states have (on average 1.25) internal successors, (235), 193 states have internal predecessors, (235), 83 states have call successors, (83), 12 states have call predecessors, (83), 12 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2023-02-16 02:05:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 400 transitions. [2023-02-16 02:05:37,224 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 400 transitions. Word has length 60 [2023-02-16 02:05:37,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:05:37,225 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 400 transitions. [2023-02-16 02:05:37,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-16 02:05:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 400 transitions. [2023-02-16 02:05:37,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-16 02:05:37,226 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:05:37,226 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1] [2023-02-16 02:05:37,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-16 02:05:37,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-16 02:05:37,431 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:05:37,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:05:37,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1726486837, now seen corresponding path program 1 times [2023-02-16 02:05:37,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:05:37,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543048837] [2023-02-16 02:05:37,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:37,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:05:37,438 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:05:37,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785751802] [2023-02-16 02:05:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:37,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:37,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:05:37,440 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:05:37,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 02:05:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:05:37,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 02:05:37,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:05:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-16 02:05:37,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:05:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-16 02:05:37,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:05:37,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543048837] [2023-02-16 02:05:37,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:05:37,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785751802] [2023-02-16 02:05:37,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785751802] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:05:37,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:05:37,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-16 02:05:37,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059387149] [2023-02-16 02:05:37,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:05:37,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 02:05:37,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:05:37,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 02:05:37,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-02-16 02:05:37,587 INFO L87 Difference]: Start difference. First operand 284 states and 400 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-16 02:05:37,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:05:37,925 INFO L93 Difference]: Finished difference Result 477 states and 680 transitions. [2023-02-16 02:05:37,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 02:05:37,926 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2023-02-16 02:05:37,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:05:37,927 INFO L225 Difference]: With dead ends: 477 [2023-02-16 02:05:37,927 INFO L226 Difference]: Without dead ends: 288 [2023-02-16 02:05:37,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2023-02-16 02:05:37,928 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 46 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:05:37,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 259 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:05:37,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-02-16 02:05:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 235. [2023-02-16 02:05:38,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 147 states have (on average 1.183673469387755) internal successors, (174), 149 states have internal predecessors, (174), 75 states have call successors, (75), 12 states have call predecessors, (75), 12 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2023-02-16 02:05:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 323 transitions. [2023-02-16 02:05:38,026 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 323 transitions. Word has length 68 [2023-02-16 02:05:38,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:05:38,026 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 323 transitions. [2023-02-16 02:05:38,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-16 02:05:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 323 transitions. [2023-02-16 02:05:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-16 02:05:38,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:05:38,027 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 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] [2023-02-16 02:05:38,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 02:05:38,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-16 02:05:38,232 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:05:38,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:05:38,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 2 times [2023-02-16 02:05:38,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:05:38,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792553170] [2023-02-16 02:05:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:05:38,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:05:38,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:05:38,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999330997] [2023-02-16 02:05:38,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:05:38,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:05:38,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:05:38,257 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:05:38,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 02:05:38,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:05:38,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:05:38,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-16 02:05:38,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:05:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-16 02:05:38,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:05:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-16 02:05:40,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:05:40,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792553170] [2023-02-16 02:05:40,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:05:40,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999330997] [2023-02-16 02:05:40,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999330997] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:05:40,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:05:40,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-02-16 02:05:40,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324574279] [2023-02-16 02:05:40,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:05:40,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 02:05:40,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:05:40,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 02:05:40,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2023-02-16 02:05:40,281 INFO L87 Difference]: Start difference. First operand 235 states and 323 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-16 02:05:42,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:06:11,066 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 [] [2023-02-16 02:06:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:06:14,046 INFO L93 Difference]: Finished difference Result 383 states and 534 transitions. [2023-02-16 02:06:14,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-16 02:06:14,047 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 73 [2023-02-16 02:06:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:06:14,048 INFO L225 Difference]: With dead ends: 383 [2023-02-16 02:06:14,048 INFO L226 Difference]: Without dead ends: 381 [2023-02-16 02:06:14,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=563, Invalid=2406, Unknown=1, NotChecked=0, Total=2970 [2023-02-16 02:06:14,050 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 215 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 278 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2023-02-16 02:06:14,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 447 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1301 Invalid, 1 Unknown, 0 Unchecked, 19.0s Time] [2023-02-16 02:06:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-02-16 02:06:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 324. [2023-02-16 02:06:14,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 198 states have (on average 1.196969696969697) internal successors, (237), 199 states have internal predecessors, (237), 109 states have call successors, (109), 16 states have call predecessors, (109), 16 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-16 02:06:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 454 transitions. [2023-02-16 02:06:14,189 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 454 transitions. Word has length 73 [2023-02-16 02:06:14,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:06:14,190 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 454 transitions. [2023-02-16 02:06:14,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-02-16 02:06:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 454 transitions. [2023-02-16 02:06:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-16 02:06:14,191 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:06:14,191 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:06:14,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-16 02:06:14,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-16 02:06:14,396 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:06:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:06:14,396 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2023-02-16 02:06:14,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:06:14,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101295111] [2023-02-16 02:06:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:14,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:06:14,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:06:14,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063602551] [2023-02-16 02:06:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:06:14,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:06:14,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:06:14,412 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:06:14,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 02:06:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:06:14,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-16 02:06:14,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:06:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-02-16 02:06:15,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:06:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-02-16 02:06:23,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:06:23,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101295111] [2023-02-16 02:06:23,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:06:23,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063602551] [2023-02-16 02:06:23,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063602551] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:06:23,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:06:23,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-16 02:06:23,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947227734] [2023-02-16 02:06:23,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:06:23,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 02:06:23,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:06:23,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 02:06:23,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 02:06:23,130 INFO L87 Difference]: Start difference. First operand 324 states and 454 transitions. Second operand has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-16 02:06:34,399 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 [] [2023-02-16 02:07:01,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:07:01,940 INFO L93 Difference]: Finished difference Result 527 states and 751 transitions. [2023-02-16 02:07:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-16 02:07:01,940 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 87 [2023-02-16 02:07:01,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:07:01,942 INFO L225 Difference]: With dead ends: 527 [2023-02-16 02:07:01,942 INFO L226 Difference]: Without dead ends: 519 [2023-02-16 02:07:01,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=1337, Invalid=5973, Unknown=0, NotChecked=0, Total=7310 [2023-02-16 02:07:01,944 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 332 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 2423 mSolverCounterSat, 713 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 3137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 713 IncrementalHoareTripleChecker+Valid, 2423 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2023-02-16 02:07:01,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 391 Invalid, 3137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [713 Valid, 2423 Invalid, 1 Unknown, 0 Unchecked, 13.7s Time] [2023-02-16 02:07:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-02-16 02:07:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 481. [2023-02-16 02:07:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 295 states have (on average 1.2135593220338983) internal successors, (358), 296 states have internal predecessors, (358), 165 states have call successors, (165), 20 states have call predecessors, (165), 20 states have return successors, (164), 164 states have call predecessors, (164), 164 states have call successors, (164) [2023-02-16 02:07:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 687 transitions. [2023-02-16 02:07:02,243 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 687 transitions. Word has length 87 [2023-02-16 02:07:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:07:02,243 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 687 transitions. [2023-02-16 02:07:02,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-16 02:07:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 687 transitions. [2023-02-16 02:07:02,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-16 02:07:02,244 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:07:02,245 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:07:02,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 02:07:02,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-16 02:07:02,449 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:07:02,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:07:02,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1330396859, now seen corresponding path program 2 times [2023-02-16 02:07:02,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:07:02,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655439159] [2023-02-16 02:07:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:07:02,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:07:02,457 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:07:02,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786149358] [2023-02-16 02:07:02,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:07:02,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:07:02,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:07:02,459 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:07:02,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 02:07:02,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:07:02,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:07:02,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 02:07:02,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:07:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-02-16 02:07:02,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:07:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-02-16 02:07:02,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:07:02,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655439159] [2023-02-16 02:07:02,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:07:02,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786149358] [2023-02-16 02:07:02,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786149358] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:07:02,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:07:02,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-02-16 02:07:02,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645776026] [2023-02-16 02:07:02,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:07:02,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 02:07:02,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:07:02,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 02:07:02,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-02-16 02:07:02,655 INFO L87 Difference]: Start difference. First operand 481 states and 687 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-16 02:07:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:07:03,445 INFO L93 Difference]: Finished difference Result 596 states and 851 transitions. [2023-02-16 02:07:03,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 02:07:03,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 95 [2023-02-16 02:07:03,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:07:03,455 INFO L225 Difference]: With dead ends: 596 [2023-02-16 02:07:03,455 INFO L226 Difference]: Without dead ends: 589 [2023-02-16 02:07:03,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 179 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2023-02-16 02:07:03,456 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 81 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 02:07:03,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 360 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 02:07:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2023-02-16 02:07:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 444. [2023-02-16 02:07:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 266 states have (on average 1.2218045112781954) internal successors, (325), 267 states have internal predecessors, (325), 157 states have call successors, (157), 20 states have call predecessors, (157), 20 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2023-02-16 02:07:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 638 transitions. [2023-02-16 02:07:03,739 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 638 transitions. Word has length 95 [2023-02-16 02:07:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:07:03,739 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 638 transitions. [2023-02-16 02:07:03,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-16 02:07:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 638 transitions. [2023-02-16 02:07:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-16 02:07:03,740 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:07:03,741 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:07:03,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-16 02:07:03,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:07:03,945 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:07:03,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:07:03,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2024025072, now seen corresponding path program 2 times [2023-02-16 02:07:03,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:07:03,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830063546] [2023-02-16 02:07:03,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:07:03,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:07:03,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:07:03,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507927066] [2023-02-16 02:07:03,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:07:03,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:07:03,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:07:03,956 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:07:03,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 02:07:04,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:07:04,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:07:04,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-16 02:07:04,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:07:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 56 proven. 37 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2023-02-16 02:07:04,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:07:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 50 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-02-16 02:07:08,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:07:08,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830063546] [2023-02-16 02:07:08,191 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:07:08,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507927066] [2023-02-16 02:07:08,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507927066] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:07:08,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:07:08,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-02-16 02:07:08,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634367884] [2023-02-16 02:07:08,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:07:08,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 02:07:08,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:07:08,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 02:07:08,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2023-02-16 02:07:08,193 INFO L87 Difference]: Start difference. First operand 444 states and 638 transitions. Second operand has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-02-16 02:08:10,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.76s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:08:17,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:08:17,794 INFO L93 Difference]: Finished difference Result 866 states and 1261 transitions. [2023-02-16 02:08:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-16 02:08:17,795 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) Word has length 107 [2023-02-16 02:08:17,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:08:17,797 INFO L225 Difference]: With dead ends: 866 [2023-02-16 02:08:17,797 INFO L226 Difference]: Without dead ends: 686 [2023-02-16 02:08:17,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2532 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=1610, Invalid=7320, Unknown=0, NotChecked=0, Total=8930 [2023-02-16 02:08:17,800 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 258 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 2193 mSolverCounterSat, 580 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 2774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 580 IncrementalHoareTripleChecker+Valid, 2193 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:08:17,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 354 Invalid, 2774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [580 Valid, 2193 Invalid, 1 Unknown, 0 Unchecked, 30.3s Time] [2023-02-16 02:08:17,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2023-02-16 02:08:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 610. [2023-02-16 02:08:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 360 states have (on average 1.225) internal successors, (441), 361 states have internal predecessors, (441), 225 states have call successors, (225), 24 states have call predecessors, (225), 24 states have return successors, (224), 224 states have call predecessors, (224), 224 states have call successors, (224) [2023-02-16 02:08:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 890 transitions. [2023-02-16 02:08:18,289 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 890 transitions. Word has length 107 [2023-02-16 02:08:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:08:18,289 INFO L495 AbstractCegarLoop]: Abstraction has 610 states and 890 transitions. [2023-02-16 02:08:18,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2023-02-16 02:08:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 890 transitions. [2023-02-16 02:08:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-16 02:08:18,291 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:08:18,291 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:08:18,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-16 02:08:18,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-16 02:08:18,496 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:08:18,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:08:18,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1576994048, now seen corresponding path program 1 times [2023-02-16 02:08:18,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:08:18,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297810456] [2023-02-16 02:08:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:08:18,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:08:18,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:08:18,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [501191230] [2023-02-16 02:08:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:08:18,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:08:18,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:08:18,522 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:08:18,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 02:08:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 02:08:18,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-16 02:08:18,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:08:18,755 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 48 proven. 30 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2023-02-16 02:08:18,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:08:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-02-16 02:08:19,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:08:19,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297810456] [2023-02-16 02:08:19,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:08:19,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501191230] [2023-02-16 02:08:19,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501191230] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:08:19,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:08:19,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-02-16 02:08:19,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593147149] [2023-02-16 02:08:19,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:08:19,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-16 02:08:19,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:08:19,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-16 02:08:19,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-02-16 02:08:19,437 INFO L87 Difference]: Start difference. First operand 610 states and 890 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2023-02-16 02:08:22,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:08:22,562 INFO L93 Difference]: Finished difference Result 1474 states and 2234 transitions. [2023-02-16 02:08:22,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-16 02:08:22,563 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 120 [2023-02-16 02:08:22,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:08:22,567 INFO L225 Difference]: With dead ends: 1474 [2023-02-16 02:08:22,567 INFO L226 Difference]: Without dead ends: 1173 [2023-02-16 02:08:22,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=433, Invalid=1729, Unknown=0, NotChecked=0, Total=2162 [2023-02-16 02:08:22,569 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 164 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-16 02:08:22,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 579 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-16 02:08:22,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2023-02-16 02:08:23,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1079. [2023-02-16 02:08:23,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 554 states have (on average 1.2761732851985559) internal successors, (707), 559 states have internal predecessors, (707), 492 states have call successors, (492), 32 states have call predecessors, (492), 32 states have return successors, (491), 487 states have call predecessors, (491), 491 states have call successors, (491) [2023-02-16 02:08:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1690 transitions. [2023-02-16 02:08:23,604 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1690 transitions. Word has length 120 [2023-02-16 02:08:23,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:08:23,605 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 1690 transitions. [2023-02-16 02:08:23,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 19 states have internal predecessors, (54), 9 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2023-02-16 02:08:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1690 transitions. [2023-02-16 02:08:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-16 02:08:23,607 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:08:23,607 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:08:23,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-16 02:08:23,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-16 02:08:23,812 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:08:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:08:23,812 INFO L85 PathProgramCache]: Analyzing trace with hash -843376510, now seen corresponding path program 2 times [2023-02-16 02:08:23,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:08:23,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016021460] [2023-02-16 02:08:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:08:23,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:08:23,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:08:23,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054693582] [2023-02-16 02:08:23,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 02:08:23,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:08:23,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:08:23,820 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:08:23,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-16 02:08:23,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 02:08:23,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:08:23,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-16 02:08:23,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:08:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 92 proven. 64 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2023-02-16 02:08:28,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:08:35,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:08:35,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016021460] [2023-02-16 02:08:35,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:08:35,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054693582] [2023-02-16 02:08:35,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054693582] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 02:08:35,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 02:08:35,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-02-16 02:08:35,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771303038] [2023-02-16 02:08:35,125 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 02:08:35,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-16 02:08:35,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:08:35,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-16 02:08:35,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=801, Unknown=1, NotChecked=0, Total=930 [2023-02-16 02:08:35,126 INFO L87 Difference]: Start difference. First operand 1079 states and 1690 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-16 02:08:39,106 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 [] [2023-02-16 02:08:41,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:08:43,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:08:45,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:08:51,787 WARN L233 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 66 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 02:08:54,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:08:56,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 02:09:01,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 02:09:01,367 INFO L93 Difference]: Finished difference Result 1228 states and 1907 transitions. [2023-02-16 02:09:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-16 02:09:01,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 120 [2023-02-16 02:09:01,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 02:09:01,372 INFO L225 Difference]: With dead ends: 1228 [2023-02-16 02:09:01,372 INFO L226 Difference]: Without dead ends: 1226 [2023-02-16 02:09:01,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=256, Invalid=1723, Unknown=1, NotChecked=0, Total=1980 [2023-02-16 02:09:01,373 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 95 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 92 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2023-02-16 02:09:01,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 367 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1415 Invalid, 4 Unknown, 0 Unchecked, 17.5s Time] [2023-02-16 02:09:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2023-02-16 02:09:02,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1199. [2023-02-16 02:09:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 613 states have (on average 1.2756933115823816) internal successors, (782), 619 states have internal predecessors, (782), 547 states have call successors, (547), 38 states have call predecessors, (547), 38 states have return successors, (546), 541 states have call predecessors, (546), 546 states have call successors, (546) [2023-02-16 02:09:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1875 transitions. [2023-02-16 02:09:02,522 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1875 transitions. Word has length 120 [2023-02-16 02:09:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 02:09:02,524 INFO L495 AbstractCegarLoop]: Abstraction has 1199 states and 1875 transitions. [2023-02-16 02:09:02,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2023-02-16 02:09:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1875 transitions. [2023-02-16 02:09:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-16 02:09:02,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 02:09:02,526 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 02:09:02,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-16 02:09:02,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-16 02:09:02,733 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 02:09:02,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 02:09:02,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1948772218, now seen corresponding path program 3 times [2023-02-16 02:09:02,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 02:09:02,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175210340] [2023-02-16 02:09:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 02:09:02,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 02:09:02,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 02:09:02,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992455510] [2023-02-16 02:09:02,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 02:09:02,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 02:09:02,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 02:09:02,746 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 02:09:02,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-16 02:09:03,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-16 02:09:03,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 02:09:03,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 103 conjunts are in the unsatisfiable core [2023-02-16 02:09:03,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 02:09:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 90 proven. 84 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2023-02-16 02:09:05,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 02:09:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 125 proven. 27 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-02-16 02:09:09,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 02:09:09,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175210340] [2023-02-16 02:09:09,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 02:09:09,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992455510] [2023-02-16 02:09:09,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992455510] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 02:09:09,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 02:09:09,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 38 [2023-02-16 02:09:09,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976222151] [2023-02-16 02:09:09,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 02:09:09,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-16 02:09:09,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 02:09:09,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-16 02:09:09,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2023-02-16 02:09:09,597 INFO L87 Difference]: Start difference. First operand 1199 states and 1875 transitions. Second operand has 38 states, 36 states have (on average 2.25) internal successors, (81), 32 states have internal predecessors, (81), 12 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (31), 9 states have call predecessors, (31), 10 states have call successors, (31) [2023-02-16 02:09:25,305 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 [0] [2023-02-16 02:09:39,945 WARN L233 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 87 DAG size of output: 81 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)