./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 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/egcd2-ll_valuebound5.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 ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 23:52:31,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 23:52:31,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 23:52:31,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 23:52:31,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 23:52:31,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 23:52:31,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 23:52:31,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 23:52:31,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 23:52:31,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 23:52:31,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 23:52:31,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 23:52:31,177 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 23:52:31,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 23:52:31,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 23:52:31,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 23:52:31,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 23:52:31,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 23:52:31,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 23:52:31,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 23:52:31,184 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 23:52:31,185 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 23:52:31,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 23:52:31,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 23:52:31,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 23:52:31,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 23:52:31,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 23:52:31,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 23:52:31,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 23:52:31,193 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 23:52:31,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 23:52:31,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 23:52:31,197 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 23:52:31,198 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 23:52:31,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 23:52:31,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 23:52:31,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 23:52:31,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 23:52:31,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 23:52:31,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 23:52:31,203 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 23:52:31,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 23:52:31,221 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 23:52:31,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 23:52:31,221 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 23:52:31,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 23:52:31,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 23:52:31,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 23:52:31,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 23:52:31,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 23:52:31,223 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 23:52:31,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 23:52:31,224 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 23:52:31,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 23:52:31,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 23:52:31,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 23:52:31,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 23:52:31,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 23:52:31,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 23:52:31,225 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 23:52:31,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 23:52:31,225 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 23:52:31,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 23:52:31,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 23:52:31,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 23:52:31,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 23:52:31,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:52:31,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 23:52:31,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 23:52:31,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 23:52:31,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 23:52:31,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 23:52:31,227 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 23:52:31,227 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 23:52:31,227 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 23:52:31,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 23:52:31,227 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 23:52:31,227 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 [2023-02-14 23:52:31,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 23:52:31,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 23:52:31,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 23:52:31,429 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 23:52:31,430 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 23:52:31,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2023-02-14 23:52:32,413 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 23:52:32,584 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 23:52:32,584 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2023-02-14 23:52:32,589 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddf687460/75f0bee228c64748917a72cc390fdd76/FLAG9dcbca3d4 [2023-02-14 23:52:32,605 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddf687460/75f0bee228c64748917a72cc390fdd76 [2023-02-14 23:52:32,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 23:52:32,609 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 23:52:32,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 23:52:32,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 23:52:32,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 23:52:32,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:52:32" (1/1) ... [2023-02-14 23:52:32,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60fd525d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32, skipping insertion in model container [2023-02-14 23:52:32,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:52:32" (1/1) ... [2023-02-14 23:52:32,622 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 23:52:32,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 23:52:32,740 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/egcd2-ll_valuebound5.c[490,503] [2023-02-14 23:52:32,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:52:32,776 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 23:52:32,785 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/egcd2-ll_valuebound5.c[490,503] [2023-02-14 23:52:32,803 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:52:32,813 INFO L208 MainTranslator]: Completed translation [2023-02-14 23:52:32,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32 WrapperNode [2023-02-14 23:52:32,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 23:52:32,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 23:52:32,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 23:52:32,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 23:52:32,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32" (1/1) ... [2023-02-14 23:52:32,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32" (1/1) ... [2023-02-14 23:52:32,844 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-02-14 23:52:32,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 23:52:32,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 23:52:32,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 23:52:32,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 23:52:32,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32" (1/1) ... [2023-02-14 23:52:32,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32" (1/1) ... [2023-02-14 23:52:32,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32" (1/1) ... [2023-02-14 23:52:32,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32" (1/1) ... [2023-02-14 23:52:32,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32" (1/1) ... [2023-02-14 23:52:32,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32" (1/1) ... [2023-02-14 23:52:32,869 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32" (1/1) ... [2023-02-14 23:52:32,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32" (1/1) ... [2023-02-14 23:52:32,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 23:52:32,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 23:52:32,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 23:52:32,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 23:52:32,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32" (1/1) ... [2023-02-14 23:52:32,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:52:32,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:32,896 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) [2023-02-14 23:52:32,925 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 [2023-02-14 23:52:32,934 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 23:52:32,934 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 23:52:32,934 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 23:52:32,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 23:52:32,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 23:52:32,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 23:52:32,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 23:52:32,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 23:52:32,983 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 23:52:32,984 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 23:52:33,082 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 23:52:33,086 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 23:52:33,086 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-14 23:52:33,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:52:33 BoogieIcfgContainer [2023-02-14 23:52:33,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 23:52:33,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 23:52:33,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 23:52:33,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 23:52:33,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:52:32" (1/3) ... [2023-02-14 23:52:33,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4190366b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:52:33, skipping insertion in model container [2023-02-14 23:52:33,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:32" (2/3) ... [2023-02-14 23:52:33,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4190366b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:52:33, skipping insertion in model container [2023-02-14 23:52:33,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:52:33" (3/3) ... [2023-02-14 23:52:33,093 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2023-02-14 23:52:33,104 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 23:52:33,104 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 23:52:33,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 23:52:33,162 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;@778b7014, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 23:52:33,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 23:52:33,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-14 23:52:33,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 23:52:33,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:33,172 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:33,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:33,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2023-02-14 23:52:33,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:33,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478374228] [2023-02-14 23:52:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:33,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:33,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:33,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478374228] [2023-02-14 23:52:33,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 23:52:33,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159207125] [2023-02-14 23:52:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:33,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:33,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:33,258 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) [2023-02-14 23:52:33,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 23:52:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:33,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 23:52:33,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-14 23:52:33,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:52:33,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159207125] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:52:33,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:52:33,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 23:52:33,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787054024] [2023-02-14 23:52:33,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:52:33,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 23:52:33,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:33,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 23:52:33,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 23:52:33,358 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 23:52:33,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:33,373 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2023-02-14 23:52:33,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 23:52:33,375 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-02-14 23:52:33,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:33,379 INFO L225 Difference]: With dead ends: 67 [2023-02-14 23:52:33,379 INFO L226 Difference]: Without dead ends: 31 [2023-02-14 23:52:33,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 23:52:33,384 INFO L413 NwaCegarLoop]: 46 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, 46 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 [2023-02-14 23:52:33,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:52:33,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-14 23:52:33,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-14 23:52:33,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 23:52:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-02-14 23:52:33,408 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2023-02-14 23:52:33,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:33,408 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-02-14 23:52:33,409 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 23:52:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-02-14 23:52:33,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 23:52:33,410 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:33,410 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:33,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 23:52:33,615 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 [2023-02-14 23:52:33,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:33,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:33,617 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2023-02-14 23:52:33,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:33,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261271308] [2023-02-14 23:52:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:33,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:33,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:33,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503130769] [2023-02-14 23:52:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:33,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:33,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:33,637 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) [2023-02-14 23:52:33,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 23:52:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:33,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 23:52:33,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-14 23:52:33,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-14 23:52:33,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:33,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261271308] [2023-02-14 23:52:33,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:33,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503130769] [2023-02-14 23:52:33,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503130769] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:52:33,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:52:33,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-14 23:52:33,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066346015] [2023-02-14 23:52:33,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:33,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 23:52:33,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:33,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 23:52:33,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-14 23:52:33,926 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 23:52:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:33,999 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2023-02-14 23:52:33,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:52:33,999 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2023-02-14 23:52:34,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:34,000 INFO L225 Difference]: With dead ends: 48 [2023-02-14 23:52:34,000 INFO L226 Difference]: Without dead ends: 40 [2023-02-14 23:52:34,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-14 23:52:34,018 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:34,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:52:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-14 23:52:34,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-14 23:52:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 23:52:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-02-14 23:52:34,026 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2023-02-14 23:52:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:34,026 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-02-14 23:52:34,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 23:52:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-02-14 23:52:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 23:52:34,027 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:34,027 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:34,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:34,228 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 [2023-02-14 23:52:34,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:34,229 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2023-02-14 23:52:34,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:34,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999384625] [2023-02-14 23:52:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:34,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:34,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:34,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287898073] [2023-02-14 23:52:34,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:34,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:34,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:34,242 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) [2023-02-14 23:52:34,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 23:52:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:34,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 23:52:34,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-14 23:52:34,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 23:52:34,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:34,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999384625] [2023-02-14 23:52:34,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:34,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287898073] [2023-02-14 23:52:34,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287898073] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 23:52:34,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:52:34,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-14 23:52:34,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689078615] [2023-02-14 23:52:34,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:52:34,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:52:34,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:34,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:52:34,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-14 23:52:34,442 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 23:52:34,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:34,505 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-02-14 23:52:34,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:52:34,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2023-02-14 23:52:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:34,506 INFO L225 Difference]: With dead ends: 39 [2023-02-14 23:52:34,506 INFO L226 Difference]: Without dead ends: 37 [2023-02-14 23:52:34,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-14 23:52:34,508 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:34,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:52:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-14 23:52:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-14 23:52:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 23:52:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-02-14 23:52:34,515 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2023-02-14 23:52:34,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:34,515 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-02-14 23:52:34,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 23:52:34,516 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-02-14 23:52:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 23:52:34,518 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:34,518 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-02-14 23:52:34,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-14 23:52:34,722 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 [2023-02-14 23:52:34,723 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:34,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2023-02-14 23:52:34,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:34,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559316033] [2023-02-14 23:52:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:34,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:34,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:34,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329263223] [2023-02-14 23:52:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:34,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:34,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:34,738 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) [2023-02-14 23:52:34,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 23:52:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:34,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-14 23:52:34,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 23:52:34,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 23:52:35,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:35,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559316033] [2023-02-14 23:52:35,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:35,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329263223] [2023-02-14 23:52:35,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329263223] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 23:52:35,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:52:35,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-14 23:52:35,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229477104] [2023-02-14 23:52:35,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:52:35,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:52:35,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:35,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:52:35,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-14 23:52:35,047 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-02-14 23:52:35,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:35,095 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-02-14 23:52:35,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:52:35,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 46 [2023-02-14 23:52:35,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:35,100 INFO L225 Difference]: With dead ends: 50 [2023-02-14 23:52:35,100 INFO L226 Difference]: Without dead ends: 48 [2023-02-14 23:52:35,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:52:35,105 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:35,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 141 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:52:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-14 23:52:35,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-14 23:52:35,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-14 23:52:35,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-02-14 23:52:35,125 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2023-02-14 23:52:35,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:35,126 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-02-14 23:52:35,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-02-14 23:52:35,127 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-02-14 23:52:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 23:52:35,129 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:35,129 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2023-02-14 23:52:35,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-14 23:52:35,333 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 [2023-02-14 23:52:35,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:35,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:35,336 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2023-02-14 23:52:35,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:35,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068894303] [2023-02-14 23:52:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:35,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:35,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:35,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770387323] [2023-02-14 23:52:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:35,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:35,386 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) [2023-02-14 23:52:35,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 23:52:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:35,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-14 23:52:35,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-14 23:52:35,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-14 23:52:35,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:35,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068894303] [2023-02-14 23:52:35,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:35,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770387323] [2023-02-14 23:52:35,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770387323] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 23:52:35,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:52:35,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-14 23:52:35,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459307284] [2023-02-14 23:52:35,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:52:35,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:52:35,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:35,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:52:35,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-14 23:52:35,636 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 23:52:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:35,679 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-02-14 23:52:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:52:35,679 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-02-14 23:52:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:35,680 INFO L225 Difference]: With dead ends: 54 [2023-02-14 23:52:35,680 INFO L226 Difference]: Without dead ends: 52 [2023-02-14 23:52:35,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:52:35,681 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:35,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:52:35,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-14 23:52:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-14 23:52:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-14 23:52:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-02-14 23:52:35,689 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2023-02-14 23:52:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:35,689 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-02-14 23:52:35,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 23:52:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-02-14 23:52:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-14 23:52:35,690 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:35,690 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2023-02-14 23:52:35,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 23:52:35,895 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 [2023-02-14 23:52:35,895 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:35,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:35,898 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2023-02-14 23:52:35,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:35,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883190425] [2023-02-14 23:52:35,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:35,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:35,907 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:35,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356722958] [2023-02-14 23:52:35,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:35,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:35,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:35,911 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) [2023-02-14 23:52:35,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 23:52:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:35,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 23:52:35,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-14 23:52:36,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:36,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:36,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883190425] [2023-02-14 23:52:36,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:36,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356722958] [2023-02-14 23:52:36,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356722958] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:52:36,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:52:36,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-14 23:52:36,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398550467] [2023-02-14 23:52:36,228 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:36,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 23:52:36,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:36,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 23:52:36,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:52:36,229 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-14 23:52:36,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:36,386 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2023-02-14 23:52:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 23:52:36,387 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2023-02-14 23:52:36,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:36,387 INFO L225 Difference]: With dead ends: 60 [2023-02-14 23:52:36,388 INFO L226 Difference]: Without dead ends: 58 [2023-02-14 23:52:36,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-02-14 23:52:36,388 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:36,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 97 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:52:36,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-14 23:52:36,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2023-02-14 23:52:36,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-14 23:52:36,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2023-02-14 23:52:36,399 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2023-02-14 23:52:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:36,399 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2023-02-14 23:52:36,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-14 23:52:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2023-02-14 23:52:36,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-14 23:52:36,400 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:36,400 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:36,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-14 23:52:36,605 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 [2023-02-14 23:52:36,605 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:36,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:36,606 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2023-02-14 23:52:36,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:36,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798661125] [2023-02-14 23:52:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:36,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:36,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:36,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677521512] [2023-02-14 23:52:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:36,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:36,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:36,633 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) [2023-02-14 23:52:36,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 23:52:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:36,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 23:52:36,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-14 23:52:36,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-14 23:52:36,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:36,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798661125] [2023-02-14 23:52:36,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:36,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677521512] [2023-02-14 23:52:36,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677521512] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:52:36,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:52:36,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-14 23:52:36,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51524461] [2023-02-14 23:52:36,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:36,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 23:52:36,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:36,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 23:52:36,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 23:52:36,813 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 23:52:36,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:36,963 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2023-02-14 23:52:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 23:52:36,964 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2023-02-14 23:52:36,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:36,966 INFO L225 Difference]: With dead ends: 102 [2023-02-14 23:52:36,966 INFO L226 Difference]: Without dead ends: 94 [2023-02-14 23:52:36,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:52:36,967 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:36,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 231 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:52:36,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-14 23:52:36,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2023-02-14 23:52:36,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-14 23:52:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2023-02-14 23:52:36,993 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2023-02-14 23:52:36,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:36,994 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2023-02-14 23:52:36,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 23:52:36,994 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2023-02-14 23:52:36,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 23:52:36,998 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:36,998 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:37,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:37,203 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 [2023-02-14 23:52:37,204 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2023-02-14 23:52:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:37,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466557989] [2023-02-14 23:52:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:37,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:37,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:37,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1321630590] [2023-02-14 23:52:37,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:37,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:37,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:37,229 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) [2023-02-14 23:52:37,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 23:52:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:37,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 23:52:37,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-14 23:52:37,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:37,511 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-14 23:52:37,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:37,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466557989] [2023-02-14 23:52:37,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:37,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321630590] [2023-02-14 23:52:37,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321630590] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:52:37,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:52:37,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-02-14 23:52:37,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384602046] [2023-02-14 23:52:37,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:37,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 23:52:37,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:37,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 23:52:37,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-14 23:52:37,514 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-14 23:52:38,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:38,129 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2023-02-14 23:52:38,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 23:52:38,130 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2023-02-14 23:52:38,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:38,131 INFO L225 Difference]: With dead ends: 128 [2023-02-14 23:52:38,132 INFO L226 Difference]: Without dead ends: 124 [2023-02-14 23:52:38,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-02-14 23:52:38,133 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:38,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 203 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 23:52:38,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-14 23:52:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2023-02-14 23:52:38,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-14 23:52:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2023-02-14 23:52:38,159 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2023-02-14 23:52:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:38,160 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2023-02-14 23:52:38,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-14 23:52:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2023-02-14 23:52:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 23:52:38,161 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:38,161 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1, 1, 1] [2023-02-14 23:52:38,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:38,366 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 [2023-02-14 23:52:38,366 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:38,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:38,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2023-02-14 23:52:38,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:38,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427779027] [2023-02-14 23:52:38,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:38,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:38,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:38,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763314313] [2023-02-14 23:52:38,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:52:38,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:38,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:38,376 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) [2023-02-14 23:52:38,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 23:52:38,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:52:38,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:52:38,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-14 23:52:38,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-14 23:52:38,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:44,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:44,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427779027] [2023-02-14 23:52:44,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:44,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763314313] [2023-02-14 23:52:44,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763314313] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:52:44,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:52:44,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-14 23:52:44,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250697720] [2023-02-14 23:52:44,466 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:44,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 23:52:44,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:44,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 23:52:44,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=229, Unknown=1, NotChecked=0, Total=272 [2023-02-14 23:52:44,467 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 23:52:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:44,852 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2023-02-14 23:52:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 23:52:44,852 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 76 [2023-02-14 23:52:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:44,854 INFO L225 Difference]: With dead ends: 124 [2023-02-14 23:52:44,854 INFO L226 Difference]: Without dead ends: 122 [2023-02-14 23:52:44,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=67, Invalid=352, Unknown=1, NotChecked=0, Total=420 [2023-02-14 23:52:44,856 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:44,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 158 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 23:52:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-14 23:52:44,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2023-02-14 23:52:44,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 68 states have internal predecessors, (77), 42 states have call successors, (42), 10 states have call predecessors, (42), 10 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-02-14 23:52:44,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2023-02-14 23:52:44,878 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 76 [2023-02-14 23:52:44,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:44,879 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2023-02-14 23:52:44,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 23:52:44,879 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2023-02-14 23:52:44,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-14 23:52:44,880 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:44,880 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1] [2023-02-14 23:52:44,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:45,085 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 [2023-02-14 23:52:45,086 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2023-02-14 23:52:45,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:45,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728141886] [2023-02-14 23:52:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:45,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:45,108 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:45,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276056467] [2023-02-14 23:52:45,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:52:45,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:45,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:45,111 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) [2023-02-14 23:52:45,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 23:52:45,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 23:52:45,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:52:45,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-14 23:52:45,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-14 23:52:45,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:46,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:46,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728141886] [2023-02-14 23:52:46,148 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:46,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276056467] [2023-02-14 23:52:46,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276056467] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:52:46,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:52:46,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-14 23:52:46,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469965270] [2023-02-14 23:52:46,149 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:46,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 23:52:46,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:46,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 23:52:46,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-02-14 23:52:46,150 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-02-14 23:52:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:46,495 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2023-02-14 23:52:46,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 23:52:46,496 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2023-02-14 23:52:46,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:46,497 INFO L225 Difference]: With dead ends: 128 [2023-02-14 23:52:46,497 INFO L226 Difference]: Without dead ends: 126 [2023-02-14 23:52:46,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-02-14 23:52:46,497 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 29 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:46,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 184 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 23:52:46,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-14 23:52:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2023-02-14 23:52:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-02-14 23:52:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2023-02-14 23:52:46,531 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2023-02-14 23:52:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:46,531 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2023-02-14 23:52:46,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-02-14 23:52:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2023-02-14 23:52:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-14 23:52:46,532 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:46,532 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1] [2023-02-14 23:52:46,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:46,737 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 [2023-02-14 23:52:46,738 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:46,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:46,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2023-02-14 23:52:46,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:46,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666617880] [2023-02-14 23:52:46,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:46,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:46,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:46,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330396520] [2023-02-14 23:52:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:46,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:46,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:46,758 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) [2023-02-14 23:52:46,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 23:52:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-14 23:52:46,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-02-14 23:52:47,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-02-14 23:52:48,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:48,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666617880] [2023-02-14 23:52:48,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:48,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330396520] [2023-02-14 23:52:48,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330396520] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:52:48,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:52:48,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-14 23:52:48,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294354946] [2023-02-14 23:52:48,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:48,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 23:52:48,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:48,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 23:52:48,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-14 23:52:48,193 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-14 23:52:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:57,336 INFO L93 Difference]: Finished difference Result 208 states and 295 transitions. [2023-02-14 23:52:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 23:52:57,336 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 87 [2023-02-14 23:52:57,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:57,337 INFO L225 Difference]: With dead ends: 208 [2023-02-14 23:52:57,337 INFO L226 Difference]: Without dead ends: 204 [2023-02-14 23:52:57,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-02-14 23:52:57,338 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 90 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:57,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 398 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-02-14 23:52:57,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-14 23:52:57,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2023-02-14 23:52:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 107 states have internal predecessors, (127), 79 states have call successors, (79), 14 states have call predecessors, (79), 14 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-14 23:52:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 284 transitions. [2023-02-14 23:52:57,400 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 284 transitions. Word has length 87 [2023-02-14 23:52:57,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:57,401 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 284 transitions. [2023-02-14 23:52:57,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-14 23:52:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 284 transitions. [2023-02-14 23:52:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-14 23:52:57,402 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:57,402 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:57,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:57,606 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 [2023-02-14 23:52:57,607 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:57,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1140726838, now seen corresponding path program 4 times [2023-02-14 23:52:57,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:57,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381033014] [2023-02-14 23:52:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:57,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:57,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:57,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747400356] [2023-02-14 23:52:57,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:52:57,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:57,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:57,631 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) [2023-02-14 23:52:57,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 23:52:57,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:52:57,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:52:57,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 23:52:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-14 23:52:57,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:52:57,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:57,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381033014] [2023-02-14 23:52:57,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:57,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747400356] [2023-02-14 23:52:57,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747400356] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:52:57,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:52:57,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 23:52:57,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897988914] [2023-02-14 23:52:57,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:52:57,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:52:57,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:57,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:52:57,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 23:52:57,704 INFO L87 Difference]: Start difference. First operand 200 states and 284 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-02-14 23:52:57,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:57,782 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2023-02-14 23:52:57,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:52:57,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 101 [2023-02-14 23:52:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:57,783 INFO L225 Difference]: With dead ends: 253 [2023-02-14 23:52:57,783 INFO L226 Difference]: Without dead ends: 181 [2023-02-14 23:52:57,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 23:52:57,784 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:57,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 145 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:52:57,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-14 23:52:57,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 167. [2023-02-14 23:52:57,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 89 states have (on average 1.146067415730337) internal successors, (102), 90 states have internal predecessors, (102), 63 states have call successors, (63), 14 states have call predecessors, (63), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-14 23:52:57,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2023-02-14 23:52:57,840 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 101 [2023-02-14 23:52:57,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:57,840 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2023-02-14 23:52:57,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-02-14 23:52:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2023-02-14 23:52:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-14 23:52:57,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:57,842 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:57,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-14 23:52:58,046 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 [2023-02-14 23:52:58,047 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:58,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:58,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2023-02-14 23:52:58,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:58,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776160584] [2023-02-14 23:52:58,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:58,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:58,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:58,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300844664] [2023-02-14 23:52:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:58,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:58,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:58,060 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) [2023-02-14 23:52:58,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 23:52:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:58,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-14 23:52:58,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 57 proven. 28 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-02-14 23:52:58,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-02-14 23:52:59,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:59,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776160584] [2023-02-14 23:52:59,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:59,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300844664] [2023-02-14 23:52:59,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300844664] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:52:59,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:52:59,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-02-14 23:52:59,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759971009] [2023-02-14 23:52:59,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:59,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 23:52:59,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:59,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 23:52:59,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-02-14 23:52:59,675 INFO L87 Difference]: Start difference. First operand 167 states and 227 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-14 23:53:15,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:53:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:53:24,230 INFO L93 Difference]: Finished difference Result 209 states and 287 transitions. [2023-02-14 23:53:24,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 23:53:24,231 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 103 [2023-02-14 23:53:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:53:24,232 INFO L225 Difference]: With dead ends: 209 [2023-02-14 23:53:24,233 INFO L226 Difference]: Without dead ends: 207 [2023-02-14 23:53:24,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2023-02-14 23:53:24,234 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 92 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-02-14 23:53:24,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 176 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2023-02-14 23:53:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-14 23:53:24,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 197. [2023-02-14 23:53:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 108 states have internal predecessors, (121), 75 states have call successors, (75), 15 states have call predecessors, (75), 15 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2023-02-14 23:53:24,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 270 transitions. [2023-02-14 23:53:24,308 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 270 transitions. Word has length 103 [2023-02-14 23:53:24,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:53:24,309 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 270 transitions. [2023-02-14 23:53:24,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-14 23:53:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 270 transitions. [2023-02-14 23:53:24,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-14 23:53:24,311 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:53:24,311 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:53:24,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 23:53:24,516 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 [2023-02-14 23:53:24,516 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:53:24,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:53:24,517 INFO L85 PathProgramCache]: Analyzing trace with hash -349873392, now seen corresponding path program 2 times [2023-02-14 23:53:24,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:53:24,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40200569] [2023-02-14 23:53:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:53:24,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:53:24,532 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:53:24,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096574319] [2023-02-14 23:53:24,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:53:24,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:53:24,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:53:24,534 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) [2023-02-14 23:53:24,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 23:53:24,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:53:24,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:53:24,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-14 23:53:24,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:53:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 51 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-14 23:53:25,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:53:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 57 proven. 42 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-02-14 23:53:26,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:53:26,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40200569] [2023-02-14 23:53:26,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:53:26,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096574319] [2023-02-14 23:53:26,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096574319] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:53:26,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:53:26,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2023-02-14 23:53:26,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102178387] [2023-02-14 23:53:26,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:53:26,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 23:53:26,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:53:26,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 23:53:26,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-02-14 23:53:26,268 INFO L87 Difference]: Start difference. First operand 197 states and 270 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2023-02-14 23:53:47,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:53:47,809 INFO L93 Difference]: Finished difference Result 278 states and 390 transitions. [2023-02-14 23:53:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-14 23:53:47,810 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) Word has length 120 [2023-02-14 23:53:47,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:53:47,811 INFO L225 Difference]: With dead ends: 278 [2023-02-14 23:53:47,811 INFO L226 Difference]: Without dead ends: 276 [2023-02-14 23:53:47,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=459, Invalid=2091, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 23:53:47,812 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 101 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-02-14 23:53:47,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 288 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2023-02-14 23:53:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-02-14 23:53:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 244. [2023-02-14 23:53:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 132 states have (on average 1.1515151515151516) internal successors, (152), 136 states have internal predecessors, (152), 93 states have call successors, (93), 18 states have call predecessors, (93), 18 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2023-02-14 23:53:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 337 transitions. [2023-02-14 23:53:47,928 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 337 transitions. Word has length 120 [2023-02-14 23:53:47,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:53:47,929 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 337 transitions. [2023-02-14 23:53:47,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2023-02-14 23:53:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 337 transitions. [2023-02-14 23:53:47,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-14 23:53:47,930 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:53:47,930 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:53:47,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 23:53:48,134 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 [2023-02-14 23:53:48,135 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:53:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:53:48,135 INFO L85 PathProgramCache]: Analyzing trace with hash -397785577, now seen corresponding path program 3 times [2023-02-14 23:53:48,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:53:48,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886070282] [2023-02-14 23:53:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:53:48,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:53:48,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:53:48,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504758050] [2023-02-14 23:53:48,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:53:48,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:53:48,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:53:48,143 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) [2023-02-14 23:53:48,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 23:53:48,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 23:53:48,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:53:48,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-14 23:53:48,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:53:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-02-14 23:53:48,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:53:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2023-02-14 23:53:48,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:53:48,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886070282] [2023-02-14 23:53:48,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:53:48,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504758050] [2023-02-14 23:53:48,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504758050] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:53:48,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:53:48,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2023-02-14 23:53:48,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811022745] [2023-02-14 23:53:48,838 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:53:48,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 23:53:48,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:53:48,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 23:53:48,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-02-14 23:53:48,839 INFO L87 Difference]: Start difference. First operand 244 states and 337 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-14 23:53:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:53:50,869 INFO L93 Difference]: Finished difference Result 283 states and 394 transitions. [2023-02-14 23:53:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-14 23:53:50,869 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 123 [2023-02-14 23:53:50,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:53:50,872 INFO L225 Difference]: With dead ends: 283 [2023-02-14 23:53:50,872 INFO L226 Difference]: Without dead ends: 281 [2023-02-14 23:53:50,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2023-02-14 23:53:50,875 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 36 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-14 23:53:50,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 273 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-14 23:53:50,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-14 23:53:50,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 248. [2023-02-14 23:53:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 139 states have internal predecessors, (155), 93 states have call successors, (93), 19 states have call predecessors, (93), 19 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2023-02-14 23:53:51,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 340 transitions. [2023-02-14 23:53:51,000 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 340 transitions. Word has length 123 [2023-02-14 23:53:51,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:53:51,001 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 340 transitions. [2023-02-14 23:53:51,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-14 23:53:51,001 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 340 transitions. [2023-02-14 23:53:51,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-14 23:53:51,002 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:53:51,002 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-02-14 23:53:51,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-14 23:53:51,207 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 [2023-02-14 23:53:51,208 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:53:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:53:51,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2023-02-14 23:53:51,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:53:51,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917647490] [2023-02-14 23:53:51,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:53:51,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:53:51,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:53:51,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986450544] [2023-02-14 23:53:51,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:53:51,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:53:51,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:53:51,237 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) [2023-02-14 23:53:51,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 23:53:51,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:53:51,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:53:51,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-14 23:53:51,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:53:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 38 proven. 61 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2023-02-14 23:53:52,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:53:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-02-14 23:53:53,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:53:53,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917647490] [2023-02-14 23:53:53,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:53:53,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986450544] [2023-02-14 23:53:53,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986450544] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:53:53,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:53:53,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 29 [2023-02-14 23:53:53,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000661340] [2023-02-14 23:53:53,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:53:53,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 23:53:53,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:53:53,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 23:53:53,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2023-02-14 23:53:53,663 INFO L87 Difference]: Start difference. First operand 248 states and 340 transitions. Second operand has 29 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 15 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2023-02-14 23:54:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:54:25,016 INFO L93 Difference]: Finished difference Result 377 states and 531 transitions. [2023-02-14 23:54:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-14 23:54:25,017 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 15 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) Word has length 134 [2023-02-14 23:54:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:54:25,018 INFO L225 Difference]: With dead ends: 377 [2023-02-14 23:54:25,018 INFO L226 Difference]: Without dead ends: 369 [2023-02-14 23:54:25,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=963, Invalid=4293, Unknown=0, NotChecked=0, Total=5256 [2023-02-14 23:54:25,020 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 194 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1937 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 1937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2023-02-14 23:54:25,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 677 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 1937 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2023-02-14 23:54:25,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-02-14 23:54:25,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 351. [2023-02-14 23:54:25,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 187 states have (on average 1.1550802139037433) internal successors, (216), 193 states have internal predecessors, (216), 140 states have call successors, (140), 23 states have call predecessors, (140), 23 states have return successors, (139), 134 states have call predecessors, (139), 139 states have call successors, (139) [2023-02-14 23:54:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 495 transitions. [2023-02-14 23:54:25,255 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 495 transitions. Word has length 134 [2023-02-14 23:54:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:54:25,256 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 495 transitions. [2023-02-14 23:54:25,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 15 states have call successors, (44), 3 states have call predecessors, (44), 2 states have return successors, (43), 13 states have call predecessors, (43), 13 states have call successors, (43) [2023-02-14 23:54:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 495 transitions. [2023-02-14 23:54:25,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-14 23:54:25,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:54:25,257 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:54:25,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 23:54:25,462 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 [2023-02-14 23:54:25,462 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:54:25,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:54:25,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 4 times [2023-02-14 23:54:25,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:54:25,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162207300] [2023-02-14 23:54:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:54:25,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:54:25,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:54:25,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031939321] [2023-02-14 23:54:25,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:54:25,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:54:25,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:54:25,471 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) [2023-02-14 23:54:25,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 23:54:25,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:54:25,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:54:25,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 90 conjunts are in the unsatisfiable core [2023-02-14 23:54:25,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:54:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 144 proven. 83 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2023-02-14 23:54:27,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:54:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 138 proven. 63 refuted. 2 times theorem prover too weak. 642 trivial. 0 not checked. [2023-02-14 23:54:42,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:54:42,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162207300] [2023-02-14 23:54:42,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:54:42,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031939321] [2023-02-14 23:54:42,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031939321] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:54:42,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:54:42,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2023-02-14 23:54:42,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088782536] [2023-02-14 23:54:42,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:54:42,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 23:54:42,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:54:42,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 23:54:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=894, Unknown=3, NotChecked=0, Total=1122 [2023-02-14 23:54:42,886 INFO L87 Difference]: Start difference. First operand 351 states and 495 transitions. Second operand has 34 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 28 states have internal predecessors, (58), 18 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 18 states have call predecessors, (49), 17 states have call successors, (49) [2023-02-14 23:55:07,720 WARN L233 SmtUtils]: Spent 19.98s on a formula simplification. DAG size of input: 141 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 23:55:19,793 WARN L233 SmtUtils]: Spent 11.49s on a formula simplification that was a NOOP. DAG size: 123 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 23:55:39,219 WARN L233 SmtUtils]: Spent 18.22s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 23:55:50,064 WARN L233 SmtUtils]: Spent 8.48s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 23:56:23,430 WARN L233 SmtUtils]: Spent 33.09s on a formula simplification. DAG size of input: 140 DAG size of output: 97 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 23:56:25,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:56:28,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:56:29,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:56:32,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:56:45,363 WARN L233 SmtUtils]: Spent 12.61s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 23:56:47,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:56:49,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:57:03,506 WARN L233 SmtUtils]: Spent 11.35s on a formula simplification. DAG size of input: 116 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 23:57:05,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:57:07,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:57:10,060 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 []