./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/ps6-ll_valuebound10.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c9e40c4fcbf0a2270c810eae17f30e2b9a539f72a78b9b7061997095813940b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 00:33:43,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 00:33:43,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 00:33:43,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 00:33:43,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 00:33:43,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 00:33:43,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 00:33:43,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 00:33:43,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 00:33:43,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 00:33:43,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 00:33:43,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 00:33:43,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 00:33:43,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 00:33:43,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 00:33:43,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 00:33:43,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 00:33:43,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 00:33:43,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 00:33:43,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 00:33:43,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 00:33:43,213 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 00:33:43,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 00:33:43,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 00:33:43,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 00:33:43,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 00:33:43,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 00:33:43,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 00:33:43,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 00:33:43,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 00:33:43,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 00:33:43,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 00:33:43,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 00:33:43,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 00:33:43,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 00:33:43,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 00:33:43,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 00:33:43,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 00:33:43,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 00:33:43,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 00:33:43,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 00:33:43,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 00:33:43,263 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 00:33:43,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 00:33:43,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 00:33:43,264 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 00:33:43,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 00:33:43,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 00:33:43,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 00:33:43,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 00:33:43,267 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 00:33:43,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 00:33:43,268 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 00:33:43,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 00:33:43,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 00:33:43,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 00:33:43,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 00:33:43,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 00:33:43,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 00:33:43,269 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 00:33:43,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 00:33:43,269 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 00:33:43,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 00:33:43,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 00:33:43,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 00:33:43,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 00:33:43,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:33:43,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 00:33:43,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 00:33:43,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 00:33:43,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 00:33:43,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 00:33:43,271 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 00:33:43,271 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 00:33:43,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 00:33:43,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c9e40c4fcbf0a2270c810eae17f30e2b9a539f72a78b9b7061997095813940b [2021-12-28 00:33:43,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 00:33:43,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 00:33:43,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 00:33:43,580 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 00:33:43,581 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 00:33:43,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c [2021-12-28 00:33:43,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42219a46b/edd5529b7b3146bb902cb1d654f61fb6/FLAGeab537700 [2021-12-28 00:33:44,032 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 00:33:44,033 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c [2021-12-28 00:33:44,044 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42219a46b/edd5529b7b3146bb902cb1d654f61fb6/FLAGeab537700 [2021-12-28 00:33:44,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42219a46b/edd5529b7b3146bb902cb1d654f61fb6 [2021-12-28 00:33:44,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 00:33:44,445 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 00:33:44,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 00:33:44,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 00:33:44,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 00:33:44,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:33:44" (1/1) ... [2021-12-28 00:33:44,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd57637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:33:44, skipping insertion in model container [2021-12-28 00:33:44,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:33:44" (1/1) ... [2021-12-28 00:33:44,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 00:33:44,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 00:33:44,604 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/ps6-ll_valuebound10.c[458,471] [2021-12-28 00:33:44,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:33:44,637 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 00:33:44,652 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/ps6-ll_valuebound10.c[458,471] [2021-12-28 00:33:44,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:33:44,686 INFO L208 MainTranslator]: Completed translation [2021-12-28 00:33:44,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:33:44 WrapperNode [2021-12-28 00:33:44,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 00:33:44,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 00:33:44,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 00:33:44,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 00:33:44,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:33:44" (1/1) ... [2021-12-28 00:33:44,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:33:44" (1/1) ... [2021-12-28 00:33:44,760 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2021-12-28 00:33:44,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 00:33:44,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 00:33:44,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 00:33:44,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 00:33:44,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:33:44" (1/1) ... [2021-12-28 00:33:44,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:33:44" (1/1) ... [2021-12-28 00:33:44,777 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:33:44" (1/1) ... [2021-12-28 00:33:44,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:33:44" (1/1) ... [2021-12-28 00:33:44,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:33:44" (1/1) ... [2021-12-28 00:33:44,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:33:44" (1/1) ... [2021-12-28 00:33:44,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:33:44" (1/1) ... [2021-12-28 00:33:44,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 00:33:44,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 00:33:44,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 00:33:44,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 00:33:44,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:33:44" (1/1) ... [2021-12-28 00:33:44,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:33:44,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:33:44,824 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) [2021-12-28 00:33:44,836 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 [2021-12-28 00:33:44,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 00:33:44,866 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 00:33:44,866 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 00:33:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 00:33:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 00:33:44,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 00:33:44,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 00:33:44,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 00:33:44,921 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 00:33:44,923 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 00:33:45,053 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 00:33:45,061 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 00:33:45,061 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 00:33:45,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:33:45 BoogieIcfgContainer [2021-12-28 00:33:45,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 00:33:45,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 00:33:45,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 00:33:45,067 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 00:33:45,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 12:33:44" (1/3) ... [2021-12-28 00:33:45,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de050cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:33:45, skipping insertion in model container [2021-12-28 00:33:45,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:33:44" (2/3) ... [2021-12-28 00:33:45,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de050cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:33:45, skipping insertion in model container [2021-12-28 00:33:45,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:33:45" (3/3) ... [2021-12-28 00:33:45,074 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound10.c [2021-12-28 00:33:45,078 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 00:33:45,078 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 00:33:45,116 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 00:33:45,124 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 00:33:45,125 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 00:33:45,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-28 00:33:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-28 00:33:45,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:33:45,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:33:45,148 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:33:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:33:45,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1845349065, now seen corresponding path program 1 times [2021-12-28 00:33:45,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:33:45,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449869653] [2021-12-28 00:33:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:33:45,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:33:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:33:45,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 00:33:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:33:45,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 00:33:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:33:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 00:33:45,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:33:45,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449869653] [2021-12-28 00:33:45,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449869653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:33:45,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:33:45,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 00:33:45,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417169595] [2021-12-28 00:33:45,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:33:45,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 00:33:45,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:33:45,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 00:33:45,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 00:33:45,308 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-12-28 00:33:45,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:33:45,322 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2021-12-28 00:33:45,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 00:33:45,323 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 18 [2021-12-28 00:33:45,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:33:45,328 INFO L225 Difference]: With dead ends: 45 [2021-12-28 00:33:45,329 INFO L226 Difference]: Without dead ends: 20 [2021-12-28 00:33:45,331 INFO L932 BasicCegarLoop]: 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 [2021-12-28 00:33:45,333 INFO L933 BasicCegarLoop]: 27 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, 27 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 [2021-12-28 00:33:45,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:33:45,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-28 00:33:45,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-28 00:33:45,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-28 00:33:45,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-28 00:33:45,386 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 18 [2021-12-28 00:33:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:33:45,386 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-28 00:33:45,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-12-28 00:33:45,400 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-28 00:33:45,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-28 00:33:45,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:33:45,401 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:33:45,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 00:33:45,402 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:33:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:33:45,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1506842435, now seen corresponding path program 1 times [2021-12-28 00:33:45,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:33:45,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205936664] [2021-12-28 00:33:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:33:45,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:33:45,417 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:33:45,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6642917] [2021-12-28 00:33:45,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:33:45,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:33:45,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:33:45,435 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) [2021-12-28 00:33:45,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 00:33:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:33:45,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 00:33:45,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:33:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 00:33:45,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:33:45,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:33:45,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205936664] [2021-12-28 00:33:45,658 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:33:45,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6642917] [2021-12-28 00:33:45,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6642917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:33:45,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:33:45,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 00:33:45,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390167407] [2021-12-28 00:33:45,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:33:45,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:33:45,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:33:45,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:33:45,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 00:33:45,667 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-28 00:33:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:33:45,838 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-12-28 00:33:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 00:33:45,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 18 [2021-12-28 00:33:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:33:45,841 INFO L225 Difference]: With dead ends: 31 [2021-12-28 00:33:45,841 INFO L226 Difference]: Without dead ends: 27 [2021-12-28 00:33:45,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:33:45,842 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:33:45,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 75 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:33:45,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-28 00:33:45,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-28 00:33:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-28 00:33:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-28 00:33:45,850 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-12-28 00:33:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:33:45,853 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-28 00:33:45,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-12-28 00:33:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-28 00:33:45,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 00:33:45,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:33:45,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:33:45,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 00:33:46,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:33:46,075 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:33:46,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:33:46,076 INFO L85 PathProgramCache]: Analyzing trace with hash 903983968, now seen corresponding path program 1 times [2021-12-28 00:33:46,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:33:46,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301986615] [2021-12-28 00:33:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:33:46,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:33:46,093 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:33:46,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214487973] [2021-12-28 00:33:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:33:46,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:33:46,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:33:46,096 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) [2021-12-28 00:33:46,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 00:33:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:33:46,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 00:33:46,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:33:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 00:33:46,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:33:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 00:33:49,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:33:49,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301986615] [2021-12-28 00:33:49,422 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:33:49,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214487973] [2021-12-28 00:33:49,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214487973] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 00:33:49,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:33:49,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-28 00:33:49,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27422064] [2021-12-28 00:33:49,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:33:49,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:33:49,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:33:49,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:33:49,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 00:33:49,424 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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) [2021-12-28 00:33:49,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:33:49,456 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-12-28 00:33:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 00:33:49,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 25 [2021-12-28 00:33:49,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:33:49,457 INFO L225 Difference]: With dead ends: 33 [2021-12-28 00:33:49,457 INFO L226 Difference]: Without dead ends: 29 [2021-12-28 00:33:49,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:33:49,459 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:33:49,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 65 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:33:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-28 00:33:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-28 00:33:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-28 00:33:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-28 00:33:49,466 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2021-12-28 00:33:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:33:49,467 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-28 00:33:49,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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) [2021-12-28 00:33:49,467 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-28 00:33:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-28 00:33:49,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:33:49,468 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:33:49,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 00:33:49,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-28 00:33:49,688 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:33:49,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:33:49,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1648043046, now seen corresponding path program 1 times [2021-12-28 00:33:49,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:33:49,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334817731] [2021-12-28 00:33:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:33:49,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:33:49,699 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:33:49,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033894892] [2021-12-28 00:33:49,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:33:49,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:33:49,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:33:49,701 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) [2021-12-28 00:33:49,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 00:33:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:33:49,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 00:33:49,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:33:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 00:33:49,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:33:50,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:33:50,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334817731] [2021-12-28 00:33:50,090 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:33:50,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033894892] [2021-12-28 00:33:50,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033894892] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:33:50,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:33:50,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-28 00:33:50,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65312487] [2021-12-28 00:33:50,091 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 00:33:50,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 00:33:50,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:33:50,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 00:33:50,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:33:50,095 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-28 00:33:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:33:50,184 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-12-28 00:33:50,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 00:33:50,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 36 [2021-12-28 00:33:50,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:33:50,185 INFO L225 Difference]: With dead ends: 38 [2021-12-28 00:33:50,186 INFO L226 Difference]: Without dead ends: 32 [2021-12-28 00:33:50,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-28 00:33:50,187 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:33:50,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 131 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:33:50,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-28 00:33:50,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-28 00:33:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 00:33:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-12-28 00:33:50,201 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 36 [2021-12-28 00:33:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:33:50,203 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-12-28 00:33:50,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-28 00:33:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-12-28 00:33:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 00:33:50,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:33:50,206 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:33:50,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 00:33:50,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:33:50,427 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:33:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:33:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash -426505545, now seen corresponding path program 2 times [2021-12-28 00:33:50,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:33:50,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690224740] [2021-12-28 00:33:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:33:50,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:33:50,442 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:33:50,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679960513] [2021-12-28 00:33:50,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 00:33:50,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:33:50,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:33:50,444 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) [2021-12-28 00:33:50,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 00:33:50,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 00:33:50,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:33:50,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-28 00:33:50,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:33:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-28 00:33:50,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:34:07,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:34:07,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690224740] [2021-12-28 00:34:07,056 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:34:07,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679960513] [2021-12-28 00:34:07,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679960513] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:34:07,056 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:34:07,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-28 00:34:07,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118419597] [2021-12-28 00:34:07,057 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 00:34:07,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 00:34:07,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:34:07,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 00:34:07,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2021-12-28 00:34:07,058 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-28 00:34:07,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:34:07,212 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-12-28 00:34:07,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 00:34:07,213 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-12-28 00:34:07,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:34:07,214 INFO L225 Difference]: With dead ends: 41 [2021-12-28 00:34:07,214 INFO L226 Difference]: Without dead ends: 35 [2021-12-28 00:34:07,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=70, Invalid=271, Unknown=1, NotChecked=0, Total=342 [2021-12-28 00:34:07,215 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:34:07,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 160 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:34:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-28 00:34:07,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-28 00:34:07,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-28 00:34:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-28 00:34:07,223 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 43 [2021-12-28 00:34:07,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:34:07,224 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-28 00:34:07,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-28 00:34:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-28 00:34:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 00:34:07,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:34:07,225 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:34:07,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 00:34:07,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:34:07,426 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:34:07,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:34:07,426 INFO L85 PathProgramCache]: Analyzing trace with hash 173594938, now seen corresponding path program 3 times [2021-12-28 00:34:07,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:34:07,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816681911] [2021-12-28 00:34:07,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:34:07,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:34:07,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:34:07,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693528640] [2021-12-28 00:34:07,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 00:34:07,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:34:07,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:34:07,447 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) [2021-12-28 00:34:07,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 00:34:08,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-28 00:34:08,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:34:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-28 00:34:08,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:34:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-28 00:34:08,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:34:08,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:34:08,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816681911] [2021-12-28 00:34:08,464 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:34:08,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693528640] [2021-12-28 00:34:08,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693528640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:34:08,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:34:08,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-28 00:34:08,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396045622] [2021-12-28 00:34:08,465 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 00:34:08,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 00:34:08,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:34:08,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 00:34:08,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-28 00:34:08,466 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-28 00:34:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:34:08,561 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-12-28 00:34:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 00:34:08,562 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 50 [2021-12-28 00:34:08,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:34:08,563 INFO L225 Difference]: With dead ends: 44 [2021-12-28 00:34:08,563 INFO L226 Difference]: Without dead ends: 38 [2021-12-28 00:34:08,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:34:08,564 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:34:08,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 207 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:34:08,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-28 00:34:08,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-28 00:34:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 00:34:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-12-28 00:34:08,577 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 50 [2021-12-28 00:34:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:34:08,577 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-12-28 00:34:08,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-28 00:34:08,578 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-12-28 00:34:08,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 00:34:08,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:34:08,581 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:34:08,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 00:34:08,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:34:08,786 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:34:08,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:34:08,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1013596503, now seen corresponding path program 4 times [2021-12-28 00:34:08,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:34:08,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006484942] [2021-12-28 00:34:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:34:08,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:34:08,802 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:34:08,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946572248] [2021-12-28 00:34:08,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 00:34:08,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:34:08,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:34:08,804 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) [2021-12-28 00:34:08,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 00:34:08,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 00:34:08,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:34:08,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-28 00:34:08,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:34:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-28 00:34:09,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:34:09,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:34:09,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006484942] [2021-12-28 00:34:09,265 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:34:09,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946572248] [2021-12-28 00:34:09,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946572248] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:34:09,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:34:09,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-28 00:34:09,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510367808] [2021-12-28 00:34:09,266 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 00:34:09,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 00:34:09,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:34:09,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 00:34:09,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-28 00:34:09,268 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-28 00:34:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:34:09,388 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2021-12-28 00:34:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 00:34:09,389 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 57 [2021-12-28 00:34:09,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:34:09,390 INFO L225 Difference]: With dead ends: 47 [2021-12-28 00:34:09,390 INFO L226 Difference]: Without dead ends: 41 [2021-12-28 00:34:09,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-28 00:34:09,391 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:34:09,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 251 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:34:09,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-28 00:34:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-28 00:34:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-28 00:34:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-28 00:34:09,399 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 57 [2021-12-28 00:34:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:34:09,400 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-28 00:34:09,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-12-28 00:34:09,400 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-28 00:34:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-28 00:34:09,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:34:09,401 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:34:09,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 00:34:09,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:34:09,615 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:34:09,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:34:09,616 INFO L85 PathProgramCache]: Analyzing trace with hash 66449050, now seen corresponding path program 5 times [2021-12-28 00:34:09,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:34:09,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989100833] [2021-12-28 00:34:09,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:34:09,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:34:09,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:34:09,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599057889] [2021-12-28 00:34:09,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 00:34:09,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:34:09,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:34:09,628 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) [2021-12-28 00:34:09,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 00:34:12,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-28 00:34:12,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:34:12,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-28 00:34:12,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:34:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-28 00:34:12,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:34:12,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:34:12,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989100833] [2021-12-28 00:34:12,530 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:34:12,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599057889] [2021-12-28 00:34:12,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599057889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:34:12,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:34:12,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-28 00:34:12,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402430447] [2021-12-28 00:34:12,530 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 00:34:12,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 00:34:12,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:34:12,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 00:34:12,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:34:12,531 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-28 00:34:12,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:34:12,663 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-28 00:34:12,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 00:34:12,664 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 64 [2021-12-28 00:34:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:34:12,665 INFO L225 Difference]: With dead ends: 50 [2021-12-28 00:34:12,665 INFO L226 Difference]: Without dead ends: 44 [2021-12-28 00:34:12,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-12-28 00:34:12,666 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:34:12,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 299 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:34:12,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-28 00:34:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-28 00:34:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-28 00:34:12,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-12-28 00:34:12,674 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2021-12-28 00:34:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:34:12,674 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-12-28 00:34:12,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-12-28 00:34:12,675 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-12-28 00:34:12,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-28 00:34:12,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:34:12,676 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:34:12,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-28 00:34:12,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:34:12,884 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:34:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:34:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash 357326839, now seen corresponding path program 6 times [2021-12-28 00:34:12,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:34:12,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297717389] [2021-12-28 00:34:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:34:12,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:34:12,893 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:34:12,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869843092] [2021-12-28 00:34:12,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 00:34:12,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:34:12,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:34:12,895 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) [2021-12-28 00:34:12,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 00:34:13,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-28 00:34:13,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:34:13,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-28 00:34:13,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:34:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-28 00:34:13,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:34:13,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:34:13,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297717389] [2021-12-28 00:34:13,815 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:34:13,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869843092] [2021-12-28 00:34:13,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869843092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:34:13,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:34:13,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-28 00:34:13,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699977045] [2021-12-28 00:34:13,816 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 00:34:13,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 00:34:13,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:34:13,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 00:34:13,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-12-28 00:34:13,817 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-28 00:34:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:34:13,981 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-12-28 00:34:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 00:34:13,981 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 71 [2021-12-28 00:34:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:34:13,982 INFO L225 Difference]: With dead ends: 53 [2021-12-28 00:34:13,982 INFO L226 Difference]: Without dead ends: 47 [2021-12-28 00:34:13,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-28 00:34:13,983 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 2 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:34:13,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 351 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:34:13,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-28 00:34:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-28 00:34:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-28 00:34:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-28 00:34:13,995 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2021-12-28 00:34:13,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:34:13,995 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-28 00:34:13,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-12-28 00:34:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-28 00:34:13,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-28 00:34:13,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:34:13,999 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:34:14,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 00:34:14,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-28 00:34:14,208 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:34:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:34:14,208 INFO L85 PathProgramCache]: Analyzing trace with hash 416422906, now seen corresponding path program 7 times [2021-12-28 00:34:14,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:34:14,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7624305] [2021-12-28 00:34:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:34:14,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:34:14,217 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:34:14,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267221234] [2021-12-28 00:34:14,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-28 00:34:14,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:34:14,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:34:14,219 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:34:14,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 00:34:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:34:14,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-28 00:34:14,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:34:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-28 00:34:15,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:34:15,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:34:15,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7624305] [2021-12-28 00:34:15,258 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:34:15,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267221234] [2021-12-28 00:34:15,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267221234] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:34:15,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:34:15,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-28 00:34:15,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275755527] [2021-12-28 00:34:15,258 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 00:34:15,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-28 00:34:15,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:34:15,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-28 00:34:15,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-28 00:34:15,260 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-12-28 00:34:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:34:15,443 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-12-28 00:34:15,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 00:34:15,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 78 [2021-12-28 00:34:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:34:15,444 INFO L225 Difference]: With dead ends: 56 [2021-12-28 00:34:15,444 INFO L226 Difference]: Without dead ends: 50 [2021-12-28 00:34:15,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-12-28 00:34:15,445 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 2 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 00:34:15,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 407 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 00:34:15,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-28 00:34:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-28 00:34:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-28 00:34:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-12-28 00:34:15,453 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2021-12-28 00:34:15,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:34:15,454 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-12-28 00:34:15,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-12-28 00:34:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-12-28 00:34:15,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-28 00:34:15,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:34:15,455 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:34:15,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 00:34:15,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-28 00:34:15,661 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:34:15,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:34:15,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1706793321, now seen corresponding path program 8 times [2021-12-28 00:34:15,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:34:15,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051649785] [2021-12-28 00:34:15,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:34:15,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:34:15,671 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:34:15,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264901791] [2021-12-28 00:34:15,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 00:34:15,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:34:15,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:34:15,672 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:34:15,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 00:34:16,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 00:34:16,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:34:16,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-28 00:34:16,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:34:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-28 00:34:16,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:34:16,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:34:16,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051649785] [2021-12-28 00:34:16,675 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:34:16,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264901791] [2021-12-28 00:34:16,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264901791] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:34:16,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:34:16,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-28 00:34:16,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440322778] [2021-12-28 00:34:16,675 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 00:34:16,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 00:34:16,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:34:16,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 00:34:16,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-12-28 00:34:16,676 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-12-28 00:34:16,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:34:16,877 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2021-12-28 00:34:16,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 00:34:16,878 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 85 [2021-12-28 00:34:16,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:34:16,879 INFO L225 Difference]: With dead ends: 59 [2021-12-28 00:34:16,879 INFO L226 Difference]: Without dead ends: 53 [2021-12-28 00:34:16,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-12-28 00:34:16,880 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 00:34:16,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 467 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 00:34:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-28 00:34:16,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-28 00:34:16,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-28 00:34:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-12-28 00:34:16,890 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 85 [2021-12-28 00:34:16,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:34:16,890 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-12-28 00:34:16,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2021-12-28 00:34:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-12-28 00:34:16,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-28 00:34:16,891 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:34:16,892 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:34:16,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-28 00:34:17,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-28 00:34:17,097 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:34:17,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:34:17,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1063034534, now seen corresponding path program 9 times [2021-12-28 00:34:17,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:34:17,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719634651] [2021-12-28 00:34:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:34:17,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:34:17,107 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:34:17,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1944059491] [2021-12-28 00:34:17,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 00:34:17,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:34:17,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:34:17,108 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:34:17,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process