./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/divbin_unwindbound5.i -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 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 16:15:46,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 16:15:46,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 16:15:46,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 16:15:46,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 16:15:46,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 16:15:46,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 16:15:46,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 16:15:46,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 16:15:46,174 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 16:15:46,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 16:15:46,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 16:15:46,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 16:15:46,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 16:15:46,177 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 16:15:46,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 16:15:46,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 16:15:46,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 16:15:46,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 16:15:46,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 16:15:46,182 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 16:15:46,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 16:15:46,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 16:15:46,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 16:15:46,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 16:15:46,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 16:15:46,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 16:15:46,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 16:15:46,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 16:15:46,188 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 16:15:46,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 16:15:46,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 16:15:46,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 16:15:46,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 16:15:46,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 16:15:46,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 16:15:46,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 16:15:46,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 16:15:46,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 16:15:46,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 16:15:46,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 16:15:46,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 16:15:46,194 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 16:15:46,208 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 16:15:46,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 16:15:46,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 16:15:46,209 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 16:15:46,209 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 16:15:46,209 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 16:15:46,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 16:15:46,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 16:15:46,210 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 16:15:46,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 16:15:46,210 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 16:15:46,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 16:15:46,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 16:15:46,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 16:15:46,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 16:15:46,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 16:15:46,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 16:15:46,211 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 16:15:46,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 16:15:46,211 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 16:15:46,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 16:15:46,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 16:15:46,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 16:15:46,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 16:15:46,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:15:46,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 16:15:46,212 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 16:15:46,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 16:15:46,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 16:15:46,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 16:15:46,213 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 16:15:46,213 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 16:15:46,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 16:15:46,213 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d0e3bce6f4731d98bf8e5301c405fc62948194b21f76143536933e108212a93 [2022-07-13 16:15:46,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 16:15:46,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 16:15:46,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 16:15:46,411 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 16:15:46,412 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 16:15:46,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2022-07-13 16:15:46,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f7b40785/8a84ff05ec2a45e7a34e3d0e2d7a10ee/FLAG9d472c5a8 [2022-07-13 16:15:46,815 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 16:15:46,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound5.i [2022-07-13 16:15:46,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f7b40785/8a84ff05ec2a45e7a34e3d0e2d7a10ee/FLAG9d472c5a8 [2022-07-13 16:15:46,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f7b40785/8a84ff05ec2a45e7a34e3d0e2d7a10ee [2022-07-13 16:15:46,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 16:15:46,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 16:15:46,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 16:15:46,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 16:15:46,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 16:15:46,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:15:46" (1/1) ... [2022-07-13 16:15:46,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73b45ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:46, skipping insertion in model container [2022-07-13 16:15:46,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 04:15:46" (1/1) ... [2022-07-13 16:15:46,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 16:15:46,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 16:15:46,991 WARN L230 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/divbin_unwindbound5.i[950,963] [2022-07-13 16:15:47,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:15:47,007 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 16:15:47,015 WARN L230 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/divbin_unwindbound5.i[950,963] [2022-07-13 16:15:47,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 16:15:47,028 INFO L208 MainTranslator]: Completed translation [2022-07-13 16:15:47,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:47 WrapperNode [2022-07-13 16:15:47,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 16:15:47,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 16:15:47,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 16:15:47,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 16:15:47,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:47" (1/1) ... [2022-07-13 16:15:47,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:47" (1/1) ... [2022-07-13 16:15:47,052 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2022-07-13 16:15:47,052 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 16:15:47,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 16:15:47,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 16:15:47,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 16:15:47,058 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:47" (1/1) ... [2022-07-13 16:15:47,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:47" (1/1) ... [2022-07-13 16:15:47,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:47" (1/1) ... [2022-07-13 16:15:47,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:47" (1/1) ... [2022-07-13 16:15:47,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:47" (1/1) ... [2022-07-13 16:15:47,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:47" (1/1) ... [2022-07-13 16:15:47,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:47" (1/1) ... [2022-07-13 16:15:47,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 16:15:47,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 16:15:47,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 16:15:47,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 16:15:47,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:47" (1/1) ... [2022-07-13 16:15:47,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 16:15:47,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:47,116 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) [2022-07-13 16:15:47,139 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 [2022-07-13 16:15:47,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 16:15:47,146 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-13 16:15:47,146 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-13 16:15:47,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 16:15:47,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 16:15:47,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 16:15:47,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 16:15:47,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 16:15:47,187 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 16:15:47,188 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 16:15:47,269 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 16:15:47,273 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 16:15:47,273 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 16:15:47,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:15:47 BoogieIcfgContainer [2022-07-13 16:15:47,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 16:15:47,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 16:15:47,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 16:15:47,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 16:15:47,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 04:15:46" (1/3) ... [2022-07-13 16:15:47,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e321d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:15:47, skipping insertion in model container [2022-07-13 16:15:47,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 04:15:47" (2/3) ... [2022-07-13 16:15:47,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e321d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 04:15:47, skipping insertion in model container [2022-07-13 16:15:47,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 04:15:47" (3/3) ... [2022-07-13 16:15:47,284 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound5.i [2022-07-13 16:15:47,294 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 16:15:47,294 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 16:15:47,326 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 16:15:47,331 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4de239ea, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7eac5dcc [2022-07-13 16:15:47,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 16:15:47,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 16:15:47,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 16:15:47,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:47,356 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:15:47,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:47,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:47,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2022-07-13 16:15:47,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:47,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708660182] [2022-07-13 16:15:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:47,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:47,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 16:15:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:47,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 16:15:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:47,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:47,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708660182] [2022-07-13 16:15:47,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708660182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:15:47,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:15:47,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 16:15:47,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595404829] [2022-07-13 16:15:47,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:15:47,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 16:15:47,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:47,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 16:15:47,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:15:47,548 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 16:15:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:47,562 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-07-13 16:15:47,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 16:15:47,564 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-07-13 16:15:47,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:47,572 INFO L225 Difference]: With dead ends: 53 [2022-07-13 16:15:47,572 INFO L226 Difference]: Without dead ends: 24 [2022-07-13 16:15:47,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 16:15:47,578 INFO L413 NwaCegarLoop]: 34 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, 34 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 [2022-07-13 16:15:47,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:15:47,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-13 16:15:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-13 16:15:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 16:15:47,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-07-13 16:15:47,614 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2022-07-13 16:15:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:47,615 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-13 16:15:47,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 16:15:47,616 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2022-07-13 16:15:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-13 16:15:47,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:47,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:15:47,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 16:15:47,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:47,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2022-07-13 16:15:47,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:47,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207091395] [2022-07-13 16:15:47,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:47,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:47,641 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:47,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903485287] [2022-07-13 16:15:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:47,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:47,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:47,644 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) [2022-07-13 16:15:47,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 16:15:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:47,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 16:15:47,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:47,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:15:47,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:47,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207091395] [2022-07-13 16:15:47,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:47,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903485287] [2022-07-13 16:15:47,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903485287] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:15:47,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:15:47,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 16:15:47,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855319598] [2022-07-13 16:15:47,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:15:47,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 16:15:47,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:47,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 16:15:47,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:15:47,748 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:15:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:47,762 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-07-13 16:15:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 16:15:47,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-07-13 16:15:47,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:47,763 INFO L225 Difference]: With dead ends: 38 [2022-07-13 16:15:47,763 INFO L226 Difference]: Without dead ends: 26 [2022-07-13 16:15:47,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 16:15:47,764 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:15:47,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:15:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-13 16:15:47,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-13 16:15:47,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 16:15:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-07-13 16:15:47,769 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2022-07-13 16:15:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:47,770 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-07-13 16:15:47,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:15:47,771 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-07-13 16:15:47,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 16:15:47,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:47,771 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:15:47,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:47,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:47,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:47,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:47,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2022-07-13 16:15:47,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:47,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399504900] [2022-07-13 16:15:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:47,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:48,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:48,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34469119] [2022-07-13 16:15:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:48,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:48,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:48,003 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) [2022-07-13 16:15:48,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 16:15:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:48,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 16:15:48,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 16:15:48,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:15:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:48,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:48,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399504900] [2022-07-13 16:15:48,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:48,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34469119] [2022-07-13 16:15:48,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34469119] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 16:15:48,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:15:48,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-07-13 16:15:48,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417250752] [2022-07-13 16:15:48,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:15:48,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 16:15:48,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:48,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 16:15:48,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:15:48,352 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:15:50,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:15:52,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-13 16:15:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:52,692 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2022-07-13 16:15:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 16:15:52,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-13 16:15:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:52,694 INFO L225 Difference]: With dead ends: 38 [2022-07-13 16:15:52,694 INFO L226 Difference]: Without dead ends: 35 [2022-07-13 16:15:52,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-13 16:15:52,695 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-13 16:15:52,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 87 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-13 16:15:52,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-13 16:15:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-07-13 16:15:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 16:15:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-07-13 16:15:52,701 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2022-07-13 16:15:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:52,701 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-07-13 16:15:52,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:15:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-07-13 16:15:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 16:15:52,702 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:52,703 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:15:52,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:52,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-13 16:15:52,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:52,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421036, now seen corresponding path program 1 times [2022-07-13 16:15:52,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:52,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421207143] [2022-07-13 16:15:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:52,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:52,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:52,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465806000] [2022-07-13 16:15:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:52,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:52,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:52,940 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) [2022-07-13 16:15:52,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 16:15:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:52,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 16:15:52,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:53,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:15:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:53,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:53,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421207143] [2022-07-13 16:15:53,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:53,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465806000] [2022-07-13 16:15:53,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465806000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:15:53,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:15:53,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-13 16:15:53,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916170218] [2022-07-13 16:15:53,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:15:53,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 16:15:53,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:53,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 16:15:53,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-13 16:15:53,108 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 16:15:53,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:53,192 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2022-07-13 16:15:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 16:15:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2022-07-13 16:15:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:53,193 INFO L225 Difference]: With dead ends: 69 [2022-07-13 16:15:53,194 INFO L226 Difference]: Without dead ends: 57 [2022-07-13 16:15:53,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:15:53,195 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:15:53,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 145 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:15:53,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-13 16:15:53,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2022-07-13 16:15:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 16:15:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2022-07-13 16:15:53,216 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2022-07-13 16:15:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:53,218 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2022-07-13 16:15:53,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 16:15:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2022-07-13 16:15:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 16:15:53,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:53,222 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:15:53,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:53,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:53,439 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:53,440 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2022-07-13 16:15:53,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:53,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796318234] [2022-07-13 16:15:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:53,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:53,455 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:53,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593229496] [2022-07-13 16:15:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:53,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:53,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:53,457 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) [2022-07-13 16:15:53,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 16:15:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:53,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-13 16:15:53,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 16:15:53,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:15:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:53,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:53,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796318234] [2022-07-13 16:15:53,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:53,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593229496] [2022-07-13 16:15:53,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593229496] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 16:15:53,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 16:15:53,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-07-13 16:15:53,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253524739] [2022-07-13 16:15:53,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:15:53,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 16:15:53,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:53,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 16:15:53,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:15:53,931 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:15:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:53,965 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-07-13 16:15:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 16:15:53,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-13 16:15:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:53,967 INFO L225 Difference]: With dead ends: 53 [2022-07-13 16:15:53,967 INFO L226 Difference]: Without dead ends: 51 [2022-07-13 16:15:53,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-13 16:15:53,968 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:15:53,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 131 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-07-13 16:15:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-13 16:15:53,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-07-13 16:15:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 41 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-13 16:15:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-13 16:15:53,974 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 25 [2022-07-13 16:15:53,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:53,974 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-13 16:15:53,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-13 16:15:53,974 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-13 16:15:53,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-13 16:15:53,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:53,975 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:15:53,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:54,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:54,188 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:54,189 INFO L85 PathProgramCache]: Analyzing trace with hash -452755568, now seen corresponding path program 1 times [2022-07-13 16:15:54,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:54,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448447742] [2022-07-13 16:15:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:54,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:54,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:54,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1776472094] [2022-07-13 16:15:54,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:54,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:54,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:54,199 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) [2022-07-13 16:15:54,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 16:15:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:54,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-13 16:15:54,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:54,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:15:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:54,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:54,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448447742] [2022-07-13 16:15:54,339 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:54,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776472094] [2022-07-13 16:15:54,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776472094] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:15:54,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:15:54,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2022-07-13 16:15:54,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794707846] [2022-07-13 16:15:54,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:15:54,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 16:15:54,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:54,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 16:15:54,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-13 16:15:54,341 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 16:15:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:54,448 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2022-07-13 16:15:54,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 16:15:54,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-07-13 16:15:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:54,452 INFO L225 Difference]: With dead ends: 102 [2022-07-13 16:15:54,452 INFO L226 Difference]: Without dead ends: 95 [2022-07-13 16:15:54,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-13 16:15:54,453 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 50 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:15:54,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 126 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:15:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-13 16:15:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2022-07-13 16:15:54,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 75 states have internal predecessors, (87), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-13 16:15:54,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2022-07-13 16:15:54,468 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 25 [2022-07-13 16:15:54,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:54,469 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2022-07-13 16:15:54,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 16:15:54,469 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2022-07-13 16:15:54,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 16:15:54,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:54,469 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 16:15:54,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:54,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:54,671 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:54,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:54,671 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2022-07-13 16:15:54,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:54,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723615165] [2022-07-13 16:15:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:54,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:54,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:54,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999817135] [2022-07-13 16:15:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:54,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:54,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:54,685 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) [2022-07-13 16:15:54,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 16:15:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:54,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 16:15:54,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:54,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 16:15:54,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 16:15:54,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:54,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723615165] [2022-07-13 16:15:54,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:54,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999817135] [2022-07-13 16:15:54,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999817135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 16:15:54,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 16:15:54,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 16:15:54,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796841165] [2022-07-13 16:15:54,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 16:15:54,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 16:15:54,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:54,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 16:15:54,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 16:15:54,737 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 16:15:54,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:54,778 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2022-07-13 16:15:54,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 16:15:54,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-07-13 16:15:54,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:54,780 INFO L225 Difference]: With dead ends: 121 [2022-07-13 16:15:54,780 INFO L226 Difference]: Without dead ends: 76 [2022-07-13 16:15:54,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 16:15:54,781 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 16:15:54,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 16:15:54,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-13 16:15:54,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-07-13 16:15:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 63 states have internal predecessors, (74), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 16:15:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2022-07-13 16:15:54,796 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 31 [2022-07-13 16:15:54,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:54,797 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2022-07-13 16:15:54,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 16:15:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2022-07-13 16:15:54,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 16:15:54,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:54,798 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 16:15:54,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:55,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:55,008 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:55,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:55,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1505101988, now seen corresponding path program 1 times [2022-07-13 16:15:55,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:55,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352945219] [2022-07-13 16:15:55,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:55,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:55,017 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:55,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180964079] [2022-07-13 16:15:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:55,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:55,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:55,022 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) [2022-07-13 16:15:55,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 16:15:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 16:15:55,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 16:15:55,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 16:15:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 16:15:55,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 16:15:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 16:15:55,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 16:15:55,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352945219] [2022-07-13 16:15:55,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-13 16:15:55,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180964079] [2022-07-13 16:15:55,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180964079] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 16:15:55,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 16:15:55,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-07-13 16:15:55,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258078702] [2022-07-13 16:15:55,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 16:15:55,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 16:15:55,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 16:15:55,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 16:15:55,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-13 16:15:55,186 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:15:55,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 16:15:55,290 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2022-07-13 16:15:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 16:15:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2022-07-13 16:15:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 16:15:55,292 INFO L225 Difference]: With dead ends: 87 [2022-07-13 16:15:55,292 INFO L226 Difference]: Without dead ends: 72 [2022-07-13 16:15:55,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 16:15:55,293 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 16:15:55,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 125 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 16:15:55,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-13 16:15:55,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-13 16:15:55,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 60 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-13 16:15:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2022-07-13 16:15:55,300 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 31 [2022-07-13 16:15:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 16:15:55,301 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2022-07-13 16:15:55,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 16:15:55,301 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2022-07-13 16:15:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 16:15:55,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 16:15:55,302 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-13 16:15:55,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 16:15:55,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:55,503 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 16:15:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 16:15:55,503 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2022-07-13 16:15:55,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 16:15:55,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829201852] [2022-07-13 16:15:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:55,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 16:15:55,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-13 16:15:55,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402315834] [2022-07-13 16:15:55,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 16:15:55,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 16:15:55,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 16:15:55,512 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) [2022-07-13 16:15:55,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process