./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 c3fed411 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-tmp.no-commuhash-c3fed41 [2021-12-17 14:11:12,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 14:11:12,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 14:11:12,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 14:11:12,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 14:11:12,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 14:11:12,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 14:11:12,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 14:11:12,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 14:11:12,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 14:11:12,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 14:11:12,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 14:11:12,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 14:11:12,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 14:11:12,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 14:11:12,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 14:11:12,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 14:11:12,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 14:11:12,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 14:11:12,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 14:11:12,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 14:11:12,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 14:11:12,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 14:11:12,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 14:11:12,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 14:11:12,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 14:11:12,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 14:11:12,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 14:11:12,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 14:11:12,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 14:11:12,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 14:11:12,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 14:11:12,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 14:11:12,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 14:11:12,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 14:11:12,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 14:11:12,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 14:11:12,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 14:11:12,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 14:11:12,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 14:11:12,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 14:11:12,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 14:11:12,592 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 14:11:12,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 14:11:12,593 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 14:11:12,593 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 14:11:12,594 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 14:11:12,594 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 14:11:12,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 14:11:12,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 14:11:12,595 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 14:11:12,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 14:11:12,595 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 14:11:12,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 14:11:12,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 14:11:12,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 14:11:12,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 14:11:12,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 14:11:12,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 14:11:12,596 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 14:11:12,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 14:11:12,597 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 14:11:12,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 14:11:12,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 14:11:12,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 14:11:12,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 14:11:12,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:11:12,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 14:11:12,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 14:11:12,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 14:11:12,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 14:11:12,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 14:11:12,600 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 14:11:12,600 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 14:11:12,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 14:11:12,600 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 14:11:12,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c9e40c4fcbf0a2270c810eae17f30e2b9a539f72a78b9b7061997095813940b [2021-12-17 14:11:12,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 14:11:12,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 14:11:12,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 14:11:12,793 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 14:11:12,793 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 14:11:12,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c [2021-12-17 14:11:12,839 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80ef77317/2a0737bdc1834085889a12b57e507ff0/FLAG4f9b336f5 [2021-12-17 14:11:13,181 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 14:11:13,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound10.c [2021-12-17 14:11:13,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80ef77317/2a0737bdc1834085889a12b57e507ff0/FLAG4f9b336f5 [2021-12-17 14:11:13,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80ef77317/2a0737bdc1834085889a12b57e507ff0 [2021-12-17 14:11:13,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 14:11:13,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 14:11:13,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 14:11:13,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 14:11:13,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 14:11:13,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:11:13" (1/1) ... [2021-12-17 14:11:13,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a0d1f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:11:13, skipping insertion in model container [2021-12-17 14:11:13,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:11:13" (1/1) ... [2021-12-17 14:11:13,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 14:11:13,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 14:11:13,790 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] [2021-12-17 14:11:13,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:11:13,817 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 14:11:13,828 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] [2021-12-17 14:11:13,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 14:11:13,840 INFO L208 MainTranslator]: Completed translation [2021-12-17 14:11:13,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:11:13 WrapperNode [2021-12-17 14:11:13,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 14:11:13,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 14:11:13,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 14:11:13,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 14:11:13,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:11:13" (1/1) ... [2021-12-17 14:11:13,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:11:13" (1/1) ... [2021-12-17 14:11:13,873 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2021-12-17 14:11:13,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 14:11:13,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 14:11:13,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 14:11:13,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 14:11:13,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:11:13" (1/1) ... [2021-12-17 14:11:13,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:11:13" (1/1) ... [2021-12-17 14:11:13,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:11:13" (1/1) ... [2021-12-17 14:11:13,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:11:13" (1/1) ... [2021-12-17 14:11:13,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:11:13" (1/1) ... [2021-12-17 14:11:13,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:11:13" (1/1) ... [2021-12-17 14:11:13,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:11:13" (1/1) ... [2021-12-17 14:11:13,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 14:11:13,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 14:11:13,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 14:11:13,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 14:11:13,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:11:13" (1/1) ... [2021-12-17 14:11:13,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 14:11:13,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:11:13,915 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) [2021-12-17 14:11:13,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 14:11:13,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 14:11:13,943 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 14:11:13,943 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 14:11:13,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 14:11:13,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 14:11:13,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 14:11:13,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 14:11:13,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 14:11:13,985 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 14:11:13,986 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 14:11:14,056 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 14:11:14,060 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 14:11:14,060 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 14:11:14,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:11:14 BoogieIcfgContainer [2021-12-17 14:11:14,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 14:11:14,063 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 14:11:14,063 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 14:11:14,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 14:11:14,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:11:13" (1/3) ... [2021-12-17 14:11:14,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d1c2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:11:14, skipping insertion in model container [2021-12-17 14:11:14,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:11:13" (2/3) ... [2021-12-17 14:11:14,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d1c2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:11:14, skipping insertion in model container [2021-12-17 14:11:14,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:11:14" (3/3) ... [2021-12-17 14:11:14,072 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound10.c [2021-12-17 14:11:14,076 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 14:11:14,076 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 14:11:14,123 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 14:11:14,144 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 [2021-12-17 14:11:14,144 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 14:11:14,163 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) [2021-12-17 14:11:14,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 14:11:14,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:11:14,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:11:14,175 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:11:14,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:11:14,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1845349065, now seen corresponding path program 1 times [2021-12-17 14:11:14,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:11:14,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821792748] [2021-12-17 14:11:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:11:14,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:11:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:11:14,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 14:11:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:11:14,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 14:11:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:11:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 14:11:14,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:11:14,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821792748] [2021-12-17 14:11:14,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821792748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:11:14,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:11:14,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 14:11:14,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614976479] [2021-12-17 14:11:14,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:11:14,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 14:11:14,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:11:14,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 14:11:14,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 14:11:14,374 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) [2021-12-17 14:11:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:11:14,395 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2021-12-17 14:11:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 14:11:14,397 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 [2021-12-17 14:11:14,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:11:14,402 INFO L225 Difference]: With dead ends: 45 [2021-12-17 14:11:14,402 INFO L226 Difference]: Without dead ends: 20 [2021-12-17 14:11:14,406 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 [2021-12-17 14:11:14,410 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 [2021-12-17 14:11:14,411 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] [2021-12-17 14:11:14,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-17 14:11:14,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-17 14:11:14,445 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) [2021-12-17 14:11:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-17 14:11:14,448 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 18 [2021-12-17 14:11:14,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:11:14,448 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-17 14:11:14,449 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) [2021-12-17 14:11:14,449 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-17 14:11:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 14:11:14,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:11:14,450 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:11:14,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 14:11:14,451 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:11:14,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:11:14,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1506842435, now seen corresponding path program 1 times [2021-12-17 14:11:14,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:11:14,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429476023] [2021-12-17 14:11:14,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:11:14,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:11:14,473 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:11:14,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845562011] [2021-12-17 14:11:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:11:14,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:11:14,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:11:14,485 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) [2021-12-17 14:11:14,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 14:11:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:11:14,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 14:11:14,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:11:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 14:11:14,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 14:11:14,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:11:14,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429476023] [2021-12-17 14:11:14,628 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:11:14,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845562011] [2021-12-17 14:11:14,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845562011] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 14:11:14,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 14:11:14,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 14:11:14,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700424078] [2021-12-17 14:11:14,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:11:14,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:11:14,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:11:14,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:11:14,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 14:11:14,631 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) [2021-12-17 14:11:14,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:11:14,765 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-12-17 14:11:14,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:11:14,767 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 [2021-12-17 14:11:14,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:11:14,768 INFO L225 Difference]: With dead ends: 31 [2021-12-17 14:11:14,768 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 14:11:14,768 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 [2021-12-17 14:11:14,769 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 [2021-12-17 14:11:14,769 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] [2021-12-17 14:11:14,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 14:11:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-17 14:11:14,775 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) [2021-12-17 14:11:14,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-17 14:11:14,777 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2021-12-17 14:11:14,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:11:14,777 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-17 14:11:14,778 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) [2021-12-17 14:11:14,778 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-17 14:11:14,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 14:11:14,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:11:14,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:11:14,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 14:11:14,996 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 [2021-12-17 14:11:14,997 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:11:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:11:14,997 INFO L85 PathProgramCache]: Analyzing trace with hash 903983968, now seen corresponding path program 1 times [2021-12-17 14:11:14,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:11:14,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940620843] [2021-12-17 14:11:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:11:14,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:11:15,005 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:11:15,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320645700] [2021-12-17 14:11:15,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:11:15,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:11:15,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:11:15,007 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) [2021-12-17 14:11:15,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 14:11:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:11:15,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 14:11:15,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:11:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 14:11:15,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:11:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 14:11:15,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:11:15,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940620843] [2021-12-17 14:11:15,384 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:11:15,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320645700] [2021-12-17 14:11:15,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320645700] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 14:11:15,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:11:15,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-17 14:11:15,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037677070] [2021-12-17 14:11:15,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 14:11:15,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 14:11:15,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:11:15,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 14:11:15,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 14:11:15,385 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) [2021-12-17 14:11:15,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:11:15,455 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-12-17 14:11:15,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 14:11:15,455 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 [2021-12-17 14:11:15,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:11:15,456 INFO L225 Difference]: With dead ends: 33 [2021-12-17 14:11:15,456 INFO L226 Difference]: Without dead ends: 29 [2021-12-17 14:11:15,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 14:11:15,457 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:11:15,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 65 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:11:15,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-17 14:11:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-12-17 14:11:15,464 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) [2021-12-17 14:11:15,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-12-17 14:11:15,466 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2021-12-17 14:11:15,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:11:15,466 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-12-17 14:11:15,467 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) [2021-12-17 14:11:15,468 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-12-17 14:11:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 14:11:15,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:11:15,469 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] [2021-12-17 14:11:15,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 14:11:15,673 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 [2021-12-17 14:11:15,674 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:11:15,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:11:15,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1648043046, now seen corresponding path program 1 times [2021-12-17 14:11:15,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:11:15,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066439128] [2021-12-17 14:11:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:11:15,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:11:15,682 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:11:15,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885140319] [2021-12-17 14:11:15,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:11:15,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:11:15,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:11:15,683 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) [2021-12-17 14:11:15,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 14:11:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:11:15,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 14:11:15,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:11:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 14:11:15,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:11:16,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:11:16,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066439128] [2021-12-17 14:11:16,048 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:11:16,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885140319] [2021-12-17 14:11:16,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885140319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:11:16,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:11:16,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-17 14:11:16,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865099110] [2021-12-17 14:11:16,049 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:11:16,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 14:11:16,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:11:16,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 14:11:16,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-17 14:11:16,049 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) [2021-12-17 14:11:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:11:16,115 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-12-17 14:11:16,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 14:11:16,116 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 [2021-12-17 14:11:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:11:16,118 INFO L225 Difference]: With dead ends: 38 [2021-12-17 14:11:16,118 INFO L226 Difference]: Without dead ends: 32 [2021-12-17 14:11:16,119 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 [2021-12-17 14:11:16,123 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:11:16,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 131 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:11:16,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-17 14:11:16,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-17 14:11:16,127 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) [2021-12-17 14:11:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-12-17 14:11:16,128 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 36 [2021-12-17 14:11:16,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:11:16,128 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-12-17 14:11:16,128 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) [2021-12-17 14:11:16,128 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-12-17 14:11:16,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 14:11:16,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:11:16,130 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] [2021-12-17 14:11:16,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 14:11:16,339 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 [2021-12-17 14:11:16,340 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:11:16,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:11:16,340 INFO L85 PathProgramCache]: Analyzing trace with hash -426505545, now seen corresponding path program 2 times [2021-12-17 14:11:16,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:11:16,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893114638] [2021-12-17 14:11:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:11:16,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:11:16,351 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:11:16,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827408478] [2021-12-17 14:11:16,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 14:11:16,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:11:16,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:11:16,353 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) [2021-12-17 14:11:16,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 14:11:16,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 14:11:16,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:11:16,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 14:11:16,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:11:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 14:11:16,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:11:16,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:11:16,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893114638] [2021-12-17 14:11:16,676 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:11:16,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827408478] [2021-12-17 14:11:16,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827408478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:11:16,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:11:16,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-17 14:11:16,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994689539] [2021-12-17 14:11:16,677 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:11:16,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 14:11:16,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:11:16,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 14:11:16,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-17 14:11:16,679 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-17 14:11:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:11:16,742 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-12-17 14:11:16,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 14:11:16,742 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2021-12-17 14:11:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:11:16,743 INFO L225 Difference]: With dead ends: 41 [2021-12-17 14:11:16,743 INFO L226 Difference]: Without dead ends: 35 [2021-12-17 14:11:16,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:11:16,744 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:11:16,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 167 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:11:16,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-17 14:11:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-17 14:11:16,749 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) [2021-12-17 14:11:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-17 14:11:16,749 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 43 [2021-12-17 14:11:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:11:16,750 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-17 14:11:16,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-17 14:11:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-17 14:11:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 14:11:16,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:11:16,751 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] [2021-12-17 14:11:16,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 14:11:16,968 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 [2021-12-17 14:11:16,968 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:11:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:11:16,968 INFO L85 PathProgramCache]: Analyzing trace with hash 173594938, now seen corresponding path program 3 times [2021-12-17 14:11:16,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:11:16,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430130419] [2021-12-17 14:11:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:11:16,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:11:16,975 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:11:16,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1886699782] [2021-12-17 14:11:16,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 14:11:16,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:11:16,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:11:16,987 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) [2021-12-17 14:11:16,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 14:11:17,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-17 14:11:17,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:11:17,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 14:11:17,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:11:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 14:11:17,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:11:17,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:11:17,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430130419] [2021-12-17 14:11:17,426 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:11:17,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886699782] [2021-12-17 14:11:17,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886699782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:11:17,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:11:17,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-12-17 14:11:17,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078446151] [2021-12-17 14:11:17,426 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:11:17,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 14:11:17,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:11:17,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 14:11:17,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-17 14:11:17,427 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) [2021-12-17 14:11:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:11:17,497 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2021-12-17 14:11:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 14:11:17,498 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 [2021-12-17 14:11:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:11:17,499 INFO L225 Difference]: With dead ends: 44 [2021-12-17 14:11:17,499 INFO L226 Difference]: Without dead ends: 38 [2021-12-17 14:11:17,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:11:17,500 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 14:11:17,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 207 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 14:11:17,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-17 14:11:17,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-17 14:11:17,504 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) [2021-12-17 14:11:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-12-17 14:11:17,505 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 50 [2021-12-17 14:11:17,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:11:17,505 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-12-17 14:11:17,506 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) [2021-12-17 14:11:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-12-17 14:11:17,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 14:11:17,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:11:17,507 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] [2021-12-17 14:11:17,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 14:11:17,711 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 [2021-12-17 14:11:17,711 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:11:17,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:11:17,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1013596503, now seen corresponding path program 4 times [2021-12-17 14:11:17,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:11:17,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798596040] [2021-12-17 14:11:17,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:11:17,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:11:17,719 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:11:17,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867359505] [2021-12-17 14:11:17,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 14:11:17,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:11:17,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:11:17,722 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) [2021-12-17 14:11:17,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 14:11:17,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 14:11:17,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:11:17,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-17 14:11:17,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:11:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-17 14:11:17,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:11:18,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:11:18,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798596040] [2021-12-17 14:11:18,084 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:11:18,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867359505] [2021-12-17 14:11:18,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867359505] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:11:18,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:11:18,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-17 14:11:18,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223767898] [2021-12-17 14:11:18,085 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:11:18,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 14:11:18,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:11:18,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 14:11:18,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-17 14:11:18,086 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) [2021-12-17 14:11:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:11:18,169 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2021-12-17 14:11:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 14:11:18,169 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 [2021-12-17 14:11:18,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:11:18,170 INFO L225 Difference]: With dead ends: 47 [2021-12-17 14:11:18,170 INFO L226 Difference]: Without dead ends: 41 [2021-12-17 14:11:18,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:11:18,171 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 [2021-12-17 14:11:18,171 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] [2021-12-17 14:11:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-17 14:11:18,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-12-17 14:11:18,175 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) [2021-12-17 14:11:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-17 14:11:18,176 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 57 [2021-12-17 14:11:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:11:18,176 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-17 14:11:18,176 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) [2021-12-17 14:11:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-17 14:11:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-17 14:11:18,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:11:18,177 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] [2021-12-17 14:11:18,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 14:11:18,379 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 [2021-12-17 14:11:18,380 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:11:18,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:11:18,380 INFO L85 PathProgramCache]: Analyzing trace with hash 66449050, now seen corresponding path program 5 times [2021-12-17 14:11:18,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:11:18,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499971828] [2021-12-17 14:11:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:11:18,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:11:18,386 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:11:18,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924534993] [2021-12-17 14:11:18,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 14:11:18,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:11:18,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:11:18,387 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) [2021-12-17 14:11:18,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 14:12:06,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-17 14:12:06,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:12:06,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 14:12:06,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:12:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-17 14:12:07,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:12:07,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:12:07,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499971828] [2021-12-17 14:12:07,162 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:12:07,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924534993] [2021-12-17 14:12:07,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924534993] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:12:07,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:12:07,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-17 14:12:07,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833241923] [2021-12-17 14:12:07,162 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:12:07,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 14:12:07,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:12:07,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 14:12:07,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-12-17 14:12:07,163 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) [2021-12-17 14:12:07,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:12:07,276 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-17 14:12:07,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 14:12:07,278 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 [2021-12-17 14:12:07,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:12:07,278 INFO L225 Difference]: With dead ends: 50 [2021-12-17 14:12:07,278 INFO L226 Difference]: Without dead ends: 44 [2021-12-17 14:12:07,279 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 [2021-12-17 14:12:07,279 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 [2021-12-17 14:12:07,279 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] [2021-12-17 14:12:07,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-17 14:12:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-17 14:12:07,287 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) [2021-12-17 14:12:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-12-17 14:12:07,288 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2021-12-17 14:12:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:12:07,288 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-12-17 14:12:07,288 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) [2021-12-17 14:12:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-12-17 14:12:07,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 14:12:07,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:12:07,293 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] [2021-12-17 14:12:07,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 14:12:07,518 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 [2021-12-17 14:12:07,518 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:12:07,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:12:07,519 INFO L85 PathProgramCache]: Analyzing trace with hash 357326839, now seen corresponding path program 6 times [2021-12-17 14:12:07,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:12:07,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625860378] [2021-12-17 14:12:07,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:12:07,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:12:07,525 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:12:07,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288229736] [2021-12-17 14:12:07,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 14:12:07,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:12:07,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:12:07,527 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) [2021-12-17 14:12:07,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 14:20:57,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 14:20:57,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:20:57,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-17 14:20:57,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:20:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-17 14:20:57,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:20:57,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:20:57,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625860378] [2021-12-17 14:20:57,844 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:20:57,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288229736] [2021-12-17 14:20:57,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288229736] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:20:57,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:20:57,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-17 14:20:57,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360141412] [2021-12-17 14:20:57,845 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:20:57,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 14:20:57,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:20:57,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 14:20:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-12-17 14:20:57,846 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) [2021-12-17 14:20:57,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:20:57,990 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-12-17 14:20:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 14:20:57,991 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 [2021-12-17 14:20:57,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:20:57,992 INFO L225 Difference]: With dead ends: 53 [2021-12-17 14:20:57,992 INFO L226 Difference]: Without dead ends: 47 [2021-12-17 14:20:57,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-17 14:20:57,992 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 [2021-12-17 14:20:57,992 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] [2021-12-17 14:20:57,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-17 14:20:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-17 14:20:57,997 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) [2021-12-17 14:20:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-17 14:20:57,997 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2021-12-17 14:20:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:20:57,997 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-17 14:20:57,997 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) [2021-12-17 14:20:57,998 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-17 14:20:57,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-17 14:20:57,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:20:57,998 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] [2021-12-17 14:20:58,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 14:20:58,199 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 [2021-12-17 14:20:58,199 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:20:58,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:20:58,199 INFO L85 PathProgramCache]: Analyzing trace with hash 416422906, now seen corresponding path program 7 times [2021-12-17 14:20:58,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:20:58,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216954626] [2021-12-17 14:20:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:20:58,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:20:58,211 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:20:58,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583240246] [2021-12-17 14:20:58,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 14:20:58,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:20:58,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:20:58,214 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) [2021-12-17 14:20:58,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 14:20:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 14:20:58,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-17 14:20:58,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:20:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 18 proven. 84 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-17 14:20:59,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:20:59,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:20:59,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216954626] [2021-12-17 14:20:59,181 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:20:59,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583240246] [2021-12-17 14:20:59,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583240246] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:20:59,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:20:59,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-17 14:20:59,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694120122] [2021-12-17 14:20:59,181 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:20:59,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 14:20:59,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:20:59,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 14:20:59,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-12-17 14:20:59,182 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) [2021-12-17 14:20:59,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:20:59,329 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-12-17 14:20:59,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 14:20:59,329 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 [2021-12-17 14:20:59,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:20:59,330 INFO L225 Difference]: With dead ends: 56 [2021-12-17 14:20:59,330 INFO L226 Difference]: Without dead ends: 50 [2021-12-17 14:20:59,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-12-17 14:20:59,331 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:20:59,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 407 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:20:59,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-17 14:20:59,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-17 14:20:59,336 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) [2021-12-17 14:20:59,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-12-17 14:20:59,336 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2021-12-17 14:20:59,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:20:59,337 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-12-17 14:20:59,337 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) [2021-12-17 14:20:59,337 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-12-17 14:20:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-17 14:20:59,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:20:59,340 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] [2021-12-17 14:20:59,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 14:20:59,547 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 [2021-12-17 14:20:59,547 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:20:59,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:20:59,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1706793321, now seen corresponding path program 8 times [2021-12-17 14:20:59,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:20:59,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358548360] [2021-12-17 14:20:59,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:20:59,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:20:59,566 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:20:59,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258912725] [2021-12-17 14:20:59,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 14:20:59,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:20:59,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:20:59,576 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) [2021-12-17 14:20:59,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 14:20:59,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 14:20:59,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:20:59,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 14:20:59,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:21:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2021-12-17 14:21:00,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:21:00,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:21:00,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358548360] [2021-12-17 14:21:00,484 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:21:00,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258912725] [2021-12-17 14:21:00,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258912725] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:21:00,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:21:00,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-17 14:21:00,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218322903] [2021-12-17 14:21:00,485 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:21:00,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 14:21:00,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:21:00,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 14:21:00,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-12-17 14:21:00,486 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) [2021-12-17 14:21:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:21:00,659 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2021-12-17 14:21:00,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 14:21:00,660 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 [2021-12-17 14:21:00,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:21:00,660 INFO L225 Difference]: With dead ends: 59 [2021-12-17 14:21:00,660 INFO L226 Difference]: Without dead ends: 53 [2021-12-17 14:21:00,661 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 [2021-12-17 14:21:00,661 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 14:21:00,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 467 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 14:21:00,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-17 14:21:00,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-17 14:21:00,666 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) [2021-12-17 14:21:00,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-12-17 14:21:00,667 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 85 [2021-12-17 14:21:00,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:21:00,667 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-12-17 14:21:00,667 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) [2021-12-17 14:21:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-12-17 14:21:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 14:21:00,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:21:00,668 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] [2021-12-17 14:21:00,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-17 14:21:00,873 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 [2021-12-17 14:21:00,873 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:21:00,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:21:00,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1063034534, now seen corresponding path program 9 times [2021-12-17 14:21:00,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:21:00,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492657890] [2021-12-17 14:21:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:21:00,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:21:00,880 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:21:00,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410610164] [2021-12-17 14:21:00,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 14:21:00,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:21:00,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:21:00,888 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) [2021-12-17 14:21:00,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 14:21:01,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-12-17 14:21:01,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:21:01,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 14:21:01,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:21:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 22 proven. 135 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-12-17 14:21:02,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:21:02,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:21:02,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492657890] [2021-12-17 14:21:02,729 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:21:02,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410610164] [2021-12-17 14:21:02,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410610164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:21:02,729 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:21:02,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-12-17 14:21:02,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194767844] [2021-12-17 14:21:02,729 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:21:02,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 14:21:02,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:21:02,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 14:21:02,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-12-17 14:21:02,730 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-17 14:21:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:21:02,938 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2021-12-17 14:21:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 14:21:02,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 92 [2021-12-17 14:21:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:21:02,939 INFO L225 Difference]: With dead ends: 62 [2021-12-17 14:21:02,939 INFO L226 Difference]: Without dead ends: 56 [2021-12-17 14:21:02,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-12-17 14:21:02,940 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 14:21:02,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 531 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 14:21:02,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-17 14:21:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-17 14:21:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 15 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-17 14:21:02,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-12-17 14:21:02,945 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 92 [2021-12-17 14:21:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:21:02,945 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-12-17 14:21:02,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-12-17 14:21:02,946 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-12-17 14:21:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 14:21:02,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:21:02,946 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:21:02,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 14:21:03,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 14:21:03,152 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:21:03,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:21:03,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1524389175, now seen corresponding path program 10 times [2021-12-17 14:21:03,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:21:03,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168543331] [2021-12-17 14:21:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:21:03,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:21:03,158 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:21:03,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453263445] [2021-12-17 14:21:03,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 14:21:03,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:21:03,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:21:03,160 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:21:03,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 14:21:03,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 14:21:03,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 14:21:03,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-17 14:21:03,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 14:21:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-12-17 14:21:03,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 14:21:03,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 14:21:03,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168543331] [2021-12-17 14:21:03,646 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 14:21:03,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453263445] [2021-12-17 14:21:03,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453263445] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 14:21:03,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 14:21:03,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-17 14:21:03,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412644989] [2021-12-17 14:21:03,646 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 14:21:03,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 14:21:03,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 14:21:03,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 14:21:03,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-17 14:21:03,648 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-17 14:21:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 14:21:03,867 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2021-12-17 14:21:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 14:21:03,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 99 [2021-12-17 14:21:03,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 14:21:03,868 INFO L225 Difference]: With dead ends: 65 [2021-12-17 14:21:03,869 INFO L226 Difference]: Without dead ends: 59 [2021-12-17 14:21:03,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-12-17 14:21:03,869 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 14:21:03,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 599 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 14:21:03,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-17 14:21:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-17 14:21:03,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 16 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-17 14:21:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-12-17 14:21:03,875 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 99 [2021-12-17 14:21:03,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 14:21:03,875 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-12-17 14:21:03,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2021-12-17 14:21:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-12-17 14:21:03,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 14:21:03,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 14:21:03,876 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 14:21:03,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-17 14:21:04,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 14:21:04,088 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 14:21:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 14:21:04,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1130381638, now seen corresponding path program 11 times [2021-12-17 14:21:04,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 14:21:04,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028700379] [2021-12-17 14:21:04,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 14:21:04,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 14:21:04,096 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 14:21:04,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995357596] [2021-12-17 14:21:04,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 14:21:04,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 14:21:04,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 14:21:04,097 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 14:21:04,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process Killed by 15