./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/egcd3-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/egcd3-ll.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 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:39:30,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:39:30,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:39:30,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:39:30,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:39:30,260 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:39:30,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:39:30,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:39:30,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:39:30,264 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:39:30,265 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:39:30,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:39:30,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:39:30,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:39:30,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:39:30,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:39:30,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:39:30,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:39:30,272 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:39:30,274 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:39:30,275 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:39:30,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:39:30,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:39:30,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:39:30,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:39:30,281 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:39:30,281 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:39:30,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:39:30,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:39:30,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:39:30,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:39:30,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:39:30,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:39:30,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:39:30,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:39:30,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:39:30,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:39:30,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:39:30,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:39:30,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:39:30,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:39:30,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:39:30,290 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:39:30,309 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:39:30,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:39:30,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:39:30,310 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:39:30,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:39:30,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:39:30,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:39:30,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:39:30,313 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:39:30,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:39:30,314 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:39:30,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:39:30,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:39:30,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:39:30,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:39:30,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:39:30,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:39:30,317 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:39:30,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:39:30,318 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:39:30,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:39:30,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:39:30,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:39:30,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:39:30,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:39:30,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:39:30,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:39:30,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:39:30,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:39:30,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:39:30,321 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:39:30,321 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:39:30,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:39:30,322 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ef08007570a64191e0df13d14d3e8d62a8022f43f46779ea6f6701a621376be [2022-07-22 15:39:30,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:39:30,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:39:30,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:39:30,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:39:30,564 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:39:30,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/egcd3-ll.c [2022-07-22 15:39:30,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cf430d2e/af11a59c67ed405491da11b7b7c4fb55/FLAG6e0cca80a [2022-07-22 15:39:31,074 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:39:31,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/egcd3-ll.c [2022-07-22 15:39:31,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cf430d2e/af11a59c67ed405491da11b7b7c4fb55/FLAG6e0cca80a [2022-07-22 15:39:31,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cf430d2e/af11a59c67ed405491da11b7b7c4fb55 [2022-07-22 15:39:31,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:39:31,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:39:31,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:39:31,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:39:31,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:39:31,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:39:31" (1/1) ... [2022-07-22 15:39:31,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e1c2950 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:39:31, skipping insertion in model container [2022-07-22 15:39:31,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:39:31" (1/1) ... [2022-07-22 15:39:31,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:39:31,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:39:31,306 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/egcd3-ll.c[490,503] [2022-07-22 15:39:31,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:39:31,346 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:39:31,357 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/egcd3-ll.c[490,503] [2022-07-22 15:39:31,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:39:31,378 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:39:31,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:39:31 WrapperNode [2022-07-22 15:39:31,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:39:31,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:39:31,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:39:31,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:39:31,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:39:31" (1/1) ... [2022-07-22 15:39:31,392 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:39:31" (1/1) ... [2022-07-22 15:39:31,411 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 78 [2022-07-22 15:39:31,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:39:31,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:39:31,413 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:39:31,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:39:31,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:39:31" (1/1) ... [2022-07-22 15:39:31,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:39:31" (1/1) ... [2022-07-22 15:39:31,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:39:31" (1/1) ... [2022-07-22 15:39:31,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:39:31" (1/1) ... [2022-07-22 15:39:31,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:39:31" (1/1) ... [2022-07-22 15:39:31,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:39:31" (1/1) ... [2022-07-22 15:39:31,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:39:31" (1/1) ... [2022-07-22 15:39:31,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:39:31,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:39:31,451 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:39:31,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:39:31,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:39:31" (1/1) ... [2022-07-22 15:39:31,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:39:31,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:39:31,479 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 15:39:31,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 15:39:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:39:31,527 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 15:39:31,528 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 15:39:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:39:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:39:31,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:39:31,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 15:39:31,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 15:39:31,584 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:39:31,586 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:39:31,700 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:39:31,705 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:39:31,705 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 15:39:31,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:39:31 BoogieIcfgContainer [2022-07-22 15:39:31,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:39:31,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:39:31,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:39:31,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:39:31,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:39:31" (1/3) ... [2022-07-22 15:39:31,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23938a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:39:31, skipping insertion in model container [2022-07-22 15:39:31,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:39:31" (2/3) ... [2022-07-22 15:39:31,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23938a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:39:31, skipping insertion in model container [2022-07-22 15:39:31,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:39:31" (3/3) ... [2022-07-22 15:39:31,714 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2022-07-22 15:39:31,726 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:39:31,726 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:39:31,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:39:31,768 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2ed42747, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@278bdcfc [2022-07-22 15:39:31,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:39:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 15:39:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 15:39:31,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:39:31,778 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:39:31,779 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:39:31,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:39:31,783 INFO L85 PathProgramCache]: Analyzing trace with hash -149497031, now seen corresponding path program 1 times [2022-07-22 15:39:31,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:39:31,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235102144] [2022-07-22 15:39:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:31,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:39:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:39:31,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 15:39:31,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:39:31,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-22 15:39:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:39:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 15:39:31,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:39:31,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235102144] [2022-07-22 15:39:31,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235102144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:39:31,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:39:31,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 15:39:31,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618544500] [2022-07-22 15:39:31,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:39:31,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 15:39:31,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:39:31,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 15:39:31,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:39:31,979 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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) [2022-07-22 15:39:31,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:39:32,000 INFO L93 Difference]: Finished difference Result 61 states and 97 transitions. [2022-07-22 15:39:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 15:39:32,001 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 [2022-07-22 15:39:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:39:32,007 INFO L225 Difference]: With dead ends: 61 [2022-07-22 15:39:32,007 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 15:39:32,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:39:32,016 INFO L413 NwaCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:39:32,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:39:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 15:39:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-22 15:39:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 15:39:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-07-22 15:39:32,046 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 18 [2022-07-22 15:39:32,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:39:32,046 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-07-22 15:39:32,047 INFO L496 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) [2022-07-22 15:39:32,047 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-07-22 15:39:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 15:39:32,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:39:32,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:39:32,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:39:32,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:39:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:39:32,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2030119444, now seen corresponding path program 1 times [2022-07-22 15:39:32,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:39:32,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036513956] [2022-07-22 15:39:32,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:32,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:39:32,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:39:32,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706664178] [2022-07-22 15:39:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:32,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:32,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:39:32,071 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:39:32,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 15:39:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:39:32,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:39:32,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:39:32,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:39:32,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:39:32,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:39:32,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036513956] [2022-07-22 15:39:32,293 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:39:32,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706664178] [2022-07-22 15:39:32,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706664178] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:39:32,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:39:32,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 15:39:32,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168681370] [2022-07-22 15:39:32,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:39:32,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 15:39:32,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:39:32,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 15:39:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:39:32,297 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 15:39:32,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:39:32,433 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2022-07-22 15:39:32,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:39:32,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-22 15:39:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:39:32,437 INFO L225 Difference]: With dead ends: 47 [2022-07-22 15:39:32,437 INFO L226 Difference]: Without dead ends: 40 [2022-07-22 15:39:32,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:39:32,439 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:39:32,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 104 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:39:32,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-22 15:39:32,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2022-07-22 15:39:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 15:39:32,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-07-22 15:39:32,451 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-07-22 15:39:32,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:39:32,452 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-07-22 15:39:32,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 15:39:32,452 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-07-22 15:39:32,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 15:39:32,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:39:32,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:39:32,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 15:39:32,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:32,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:39:32,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:39:32,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1778657237, now seen corresponding path program 1 times [2022-07-22 15:39:32,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:39:32,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805476678] [2022-07-22 15:39:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:32,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:39:32,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:39:32,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650673791] [2022-07-22 15:39:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:32,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:32,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:39:32,696 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:39:32,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 15:39:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:39:32,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 15:39:32,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:39:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:39:32,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:39:32,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:39:32,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805476678] [2022-07-22 15:39:32,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:39:32,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650673791] [2022-07-22 15:39:32,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650673791] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:39:32,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:39:32,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 15:39:32,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697818110] [2022-07-22 15:39:32,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:39:32,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 15:39:32,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:39:32,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 15:39:32,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:39:32,975 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 15:39:33,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:39:33,058 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-07-22 15:39:33,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 15:39:33,058 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-22 15:39:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:39:33,059 INFO L225 Difference]: With dead ends: 46 [2022-07-22 15:39:33,060 INFO L226 Difference]: Without dead ends: 44 [2022-07-22 15:39:33,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:39:33,061 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 45 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:39:33,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 147 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:39:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-22 15:39:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-07-22 15:39:33,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 15:39:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2022-07-22 15:39:33,071 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 22 [2022-07-22 15:39:33,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:39:33,072 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2022-07-22 15:39:33,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 15:39:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2022-07-22 15:39:33,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 15:39:33,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:39:33,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:39:33,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 15:39:33,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-22 15:39:33,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:39:33,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:39:33,297 INFO L85 PathProgramCache]: Analyzing trace with hash 646289443, now seen corresponding path program 1 times [2022-07-22 15:39:33,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:39:33,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159323441] [2022-07-22 15:39:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:33,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:39:33,309 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:39:33,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526265226] [2022-07-22 15:39:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:33,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:33,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:39:33,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:39:33,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 15:39:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:39:33,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 15:39:33,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:39:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:39:33,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:39:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:39:33,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:39:33,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159323441] [2022-07-22 15:39:33,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:39:33,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526265226] [2022-07-22 15:39:33,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526265226] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:39:33,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:39:33,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-22 15:39:33,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577240253] [2022-07-22 15:39:33,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:39:33,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 15:39:33,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:39:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 15:39:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:39:33,497 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 15:39:33,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:39:33,678 INFO L93 Difference]: Finished difference Result 96 states and 134 transitions. [2022-07-22 15:39:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 15:39:33,679 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-07-22 15:39:33,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:39:33,684 INFO L225 Difference]: With dead ends: 96 [2022-07-22 15:39:33,684 INFO L226 Difference]: Without dead ends: 89 [2022-07-22 15:39:33,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:39:33,686 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 60 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:39:33,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 161 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:39:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-22 15:39:33,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2022-07-22 15:39:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 15:39:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 86 transitions. [2022-07-22 15:39:33,701 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 86 transitions. Word has length 24 [2022-07-22 15:39:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:39:33,702 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 86 transitions. [2022-07-22 15:39:33,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 15:39:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 86 transitions. [2022-07-22 15:39:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 15:39:33,703 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:39:33,703 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:39:33,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 15:39:33,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:33,919 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:39:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:39:33,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1194834104, now seen corresponding path program 1 times [2022-07-22 15:39:33,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:39:33,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000723171] [2022-07-22 15:39:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:33,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:39:33,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:39:33,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193232071] [2022-07-22 15:39:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:33,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:33,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:39:33,934 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:39:33,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 15:39:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:39:33,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 15:39:33,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:39:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:39:34,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:39:34,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:39:34,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000723171] [2022-07-22 15:39:34,079 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:39:34,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193232071] [2022-07-22 15:39:34,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193232071] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:39:34,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:39:34,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-22 15:39:34,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594089706] [2022-07-22 15:39:34,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:39:34,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 15:39:34,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:39:34,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 15:39:34,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:39:34,087 INFO L87 Difference]: Start difference. First operand 64 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 15:39:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:39:34,176 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-07-22 15:39:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 15:39:34,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-07-22 15:39:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:39:34,178 INFO L225 Difference]: With dead ends: 72 [2022-07-22 15:39:34,178 INFO L226 Difference]: Without dead ends: 70 [2022-07-22 15:39:34,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-07-22 15:39:34,179 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 28 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:39:34,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 147 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:39:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-22 15:39:34,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2022-07-22 15:39:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 15:39:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 89 transitions. [2022-07-22 15:39:34,192 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 89 transitions. Word has length 27 [2022-07-22 15:39:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:39:34,192 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 89 transitions. [2022-07-22 15:39:34,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 15:39:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 89 transitions. [2022-07-22 15:39:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 15:39:34,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:39:34,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:39:34,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 15:39:34,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:34,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:39:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:39:34,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1392040386, now seen corresponding path program 1 times [2022-07-22 15:39:34,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:39:34,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113151792] [2022-07-22 15:39:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:34,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:39:34,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:39:34,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823372604] [2022-07-22 15:39:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:34,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:34,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:39:34,420 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:39:34,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 15:39:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:39:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 15:39:34,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:39:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:39:34,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:39:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 15:39:34,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:39:34,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113151792] [2022-07-22 15:39:34,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:39:34,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823372604] [2022-07-22 15:39:34,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823372604] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:39:34,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:39:34,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-07-22 15:39:34,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859976091] [2022-07-22 15:39:34,666 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:39:34,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 15:39:34,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:39:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 15:39:34,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:39:34,667 INFO L87 Difference]: Start difference. First operand 68 states and 89 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:39:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:39:34,852 INFO L93 Difference]: Finished difference Result 104 states and 138 transitions. [2022-07-22 15:39:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 15:39:34,852 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-07-22 15:39:34,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:39:34,854 INFO L225 Difference]: With dead ends: 104 [2022-07-22 15:39:34,854 INFO L226 Difference]: Without dead ends: 102 [2022-07-22 15:39:34,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:39:34,856 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 52 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:39:34,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:39:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-22 15:39:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2022-07-22 15:39:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-22 15:39:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 132 transitions. [2022-07-22 15:39:34,899 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 132 transitions. Word has length 27 [2022-07-22 15:39:34,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:39:34,900 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 132 transitions. [2022-07-22 15:39:34,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:39:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 132 transitions. [2022-07-22 15:39:34,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 15:39:34,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:39:34,904 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:39:34,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 15:39:35,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:35,116 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:39:35,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:39:35,116 INFO L85 PathProgramCache]: Analyzing trace with hash -281586315, now seen corresponding path program 1 times [2022-07-22 15:39:35,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:39:35,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844411976] [2022-07-22 15:39:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:35,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:39:35,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:39:35,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449342859] [2022-07-22 15:39:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:35,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:35,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:39:35,131 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:39:35,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 15:39:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:39:35,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:39:35,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:39:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-22 15:39:35,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:39:35,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:39:35,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844411976] [2022-07-22 15:39:35,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:39:35,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449342859] [2022-07-22 15:39:35,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449342859] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:39:35,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:39:35,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 15:39:35,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315313625] [2022-07-22 15:39:35,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:39:35,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:39:35,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:39:35,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:39:35,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:39:35,213 INFO L87 Difference]: Start difference. First operand 98 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:39:35,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:39:35,269 INFO L93 Difference]: Finished difference Result 144 states and 204 transitions. [2022-07-22 15:39:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:39:35,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2022-07-22 15:39:35,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:39:35,270 INFO L225 Difference]: With dead ends: 144 [2022-07-22 15:39:35,271 INFO L226 Difference]: Without dead ends: 142 [2022-07-22 15:39:35,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:39:35,272 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:39:35,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 110 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:39:35,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-22 15:39:35,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2022-07-22 15:39:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 43 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-07-22 15:39:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 196 transitions. [2022-07-22 15:39:35,293 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 196 transitions. Word has length 32 [2022-07-22 15:39:35,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:39:35,294 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 196 transitions. [2022-07-22 15:39:35,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 15:39:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 196 transitions. [2022-07-22 15:39:35,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 15:39:35,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:39:35,295 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:39:35,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 15:39:35,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:35,519 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:39:35,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:39:35,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1215278097, now seen corresponding path program 1 times [2022-07-22 15:39:35,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:39:35,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193544863] [2022-07-22 15:39:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:35,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:39:35,528 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:39:35,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [644320742] [2022-07-22 15:39:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:35,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:35,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:39:35,531 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:39:35,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 15:39:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:39:35,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 15:39:35,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:39:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:39:35,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:39:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 15:39:36,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:39:36,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193544863] [2022-07-22 15:39:36,026 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:39:36,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644320742] [2022-07-22 15:39:36,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644320742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:39:36,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:39:36,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2022-07-22 15:39:36,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132679045] [2022-07-22 15:39:36,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:39:36,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 15:39:36,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:39:36,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 15:39:36,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-22 15:39:36,030 INFO L87 Difference]: Start difference. First operand 136 states and 196 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 15:39:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:39:42,773 INFO L93 Difference]: Finished difference Result 258 states and 380 transitions. [2022-07-22 15:39:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 15:39:42,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2022-07-22 15:39:42,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:39:42,776 INFO L225 Difference]: With dead ends: 258 [2022-07-22 15:39:42,776 INFO L226 Difference]: Without dead ends: 256 [2022-07-22 15:39:42,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 15:39:42,778 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 168 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:39:42,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 246 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 15:39:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-22 15:39:42,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 204. [2022-07-22 15:39:42,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 136 states have (on average 1.2941176470588236) internal successors, (176), 137 states have internal predecessors, (176), 59 states have call successors, (59), 8 states have call predecessors, (59), 8 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-07-22 15:39:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 293 transitions. [2022-07-22 15:39:42,816 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 293 transitions. Word has length 32 [2022-07-22 15:39:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:39:42,817 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 293 transitions. [2022-07-22 15:39:42,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 15:39:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 293 transitions. [2022-07-22 15:39:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 15:39:42,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:39:42,818 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:39:42,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 15:39:43,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:43,028 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:39:43,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:39:43,028 INFO L85 PathProgramCache]: Analyzing trace with hash 492814709, now seen corresponding path program 2 times [2022-07-22 15:39:43,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:39:43,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759624539] [2022-07-22 15:39:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:43,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:39:43,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:39:43,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616429457] [2022-07-22 15:39:43,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:39:43,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:43,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:39:43,049 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:39:43,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 15:39:43,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:39:43,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:39:43,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 15:39:43,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:39:43,110 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 15:39:43,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:39:43,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:39:43,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759624539] [2022-07-22 15:39:43,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:39:43,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616429457] [2022-07-22 15:39:43,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616429457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:39:43,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:39:43,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 15:39:43,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423163109] [2022-07-22 15:39:43,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:39:43,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:39:43,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:39:43,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:39:43,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:39:43,112 INFO L87 Difference]: Start difference. First operand 204 states and 293 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 15:39:43,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:39:43,213 INFO L93 Difference]: Finished difference Result 247 states and 348 transitions. [2022-07-22 15:39:43,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:39:43,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 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 32 [2022-07-22 15:39:43,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:39:43,215 INFO L225 Difference]: With dead ends: 247 [2022-07-22 15:39:43,215 INFO L226 Difference]: Without dead ends: 127 [2022-07-22 15:39:43,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:39:43,222 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 18 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:39:43,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 119 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:39:43,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-22 15:39:43,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 119. [2022-07-22 15:39:43,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 76 states have internal predecessors, (91), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-22 15:39:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2022-07-22 15:39:43,250 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 32 [2022-07-22 15:39:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:39:43,251 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2022-07-22 15:39:43,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 15:39:43,251 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2022-07-22 15:39:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-22 15:39:43,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:39:43,253 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:39:43,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 15:39:43,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 15:39:43,460 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:39:43,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:39:43,460 INFO L85 PathProgramCache]: Analyzing trace with hash -449167720, now seen corresponding path program 1 times [2022-07-22 15:39:43,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:39:43,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379236272] [2022-07-22 15:39:43,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:43,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:39:43,468 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:39:43,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492863574] [2022-07-22 15:39:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:43,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:43,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:39:43,469 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) [2022-07-22 15:39:43,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 15:39:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:39:43,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:39:43,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:39:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 15:39:43,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:39:43,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:39:43,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379236272] [2022-07-22 15:39:43,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:39:43,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492863574] [2022-07-22 15:39:43,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492863574] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:39:43,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:39:43,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 15:39:43,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909709612] [2022-07-22 15:39:43,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:39:43,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:39:43,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:39:43,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:39:43,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:39:43,543 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 15:39:43,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:39:43,612 INFO L93 Difference]: Finished difference Result 187 states and 271 transitions. [2022-07-22 15:39:43,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 15:39:43,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-07-22 15:39:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:39:43,618 INFO L225 Difference]: With dead ends: 187 [2022-07-22 15:39:43,619 INFO L226 Difference]: Without dead ends: 185 [2022-07-22 15:39:43,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:39:43,619 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:39:43,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:39:43,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-22 15:39:43,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 163. [2022-07-22 15:39:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 86 states have (on average 1.186046511627907) internal successors, (102), 95 states have internal predecessors, (102), 67 states have call successors, (67), 9 states have call predecessors, (67), 9 states have return successors, (66), 58 states have call predecessors, (66), 66 states have call successors, (66) [2022-07-22 15:39:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 235 transitions. [2022-07-22 15:39:43,663 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 235 transitions. Word has length 37 [2022-07-22 15:39:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:39:43,664 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 235 transitions. [2022-07-22 15:39:43,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-22 15:39:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 235 transitions. [2022-07-22 15:39:43,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 15:39:43,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:39:43,665 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:39:43,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 15:39:43,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 15:39:43,887 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:39:43,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:39:43,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1289603446, now seen corresponding path program 1 times [2022-07-22 15:39:43,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:39:43,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652884012] [2022-07-22 15:39:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:43,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:39:43,896 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:39:43,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500354713] [2022-07-22 15:39:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:39:43,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:39:43,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:39:43,898 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) [2022-07-22 15:39:43,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 15:39:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:39:43,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-22 15:39:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:39:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 15:39:44,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:39:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 15:39:45,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:39:45,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652884012] [2022-07-22 15:39:45,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:39:45,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500354713] [2022-07-22 15:39:45,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500354713] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:39:45,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:39:45,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-07-22 15:39:45,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309199238] [2022-07-22 15:39:45,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:39:45,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 15:39:45,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:39:45,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 15:39:45,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-22 15:39:45,809 INFO L87 Difference]: Start difference. First operand 163 states and 235 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-22 15:40:02,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:40:02,367 INFO L93 Difference]: Finished difference Result 408 states and 603 transitions. [2022-07-22 15:40:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 15:40:02,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 49 [2022-07-22 15:40:02,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:40:02,372 INFO L225 Difference]: With dead ends: 408 [2022-07-22 15:40:02,372 INFO L226 Difference]: Without dead ends: 305 [2022-07-22 15:40:02,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=484, Invalid=1966, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 15:40:02,375 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 157 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:40:02,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 197 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-07-22 15:40:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-07-22 15:40:02,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 247. [2022-07-22 15:40:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 147 states have (on average 1.2040816326530612) internal successors, (177), 154 states have internal predecessors, (177), 87 states have call successors, (87), 12 states have call predecessors, (87), 12 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-22 15:40:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 350 transitions. [2022-07-22 15:40:02,475 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 350 transitions. Word has length 49 [2022-07-22 15:40:02,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:40:02,475 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 350 transitions. [2022-07-22 15:40:02,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-22 15:40:02,475 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 350 transitions. [2022-07-22 15:40:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 15:40:02,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:40:02,477 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:40:02,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 15:40:02,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 15:40:02,691 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:40:02,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:40:02,692 INFO L85 PathProgramCache]: Analyzing trace with hash 982010905, now seen corresponding path program 1 times [2022-07-22 15:40:02,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:40:02,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642273682] [2022-07-22 15:40:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:40:02,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:40:02,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:40:02,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334694856] [2022-07-22 15:40:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:40:02,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:40:02,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:40:02,704 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) [2022-07-22 15:40:02,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 15:40:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:40:02,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 15:40:02,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:40:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-22 15:40:02,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:40:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-22 15:40:03,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:40:03,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642273682] [2022-07-22 15:40:03,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:40:03,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334694856] [2022-07-22 15:40:03,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334694856] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:40:03,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:40:03,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 15 [2022-07-22 15:40:03,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223057877] [2022-07-22 15:40:03,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:40:03,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 15:40:03,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:40:03,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 15:40:03,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-07-22 15:40:03,026 INFO L87 Difference]: Start difference. First operand 247 states and 350 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-07-22 15:40:03,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:40:03,460 INFO L93 Difference]: Finished difference Result 278 states and 394 transitions. [2022-07-22 15:40:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 15:40:03,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 59 [2022-07-22 15:40:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:40:03,463 INFO L225 Difference]: With dead ends: 278 [2022-07-22 15:40:03,463 INFO L226 Difference]: Without dead ends: 276 [2022-07-22 15:40:03,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-07-22 15:40:03,464 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:40:03,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 152 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:40:03,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-22 15:40:03,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 251. [2022-07-22 15:40:03,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 150 states have (on average 1.2) internal successors, (180), 157 states have internal predecessors, (180), 87 states have call successors, (87), 13 states have call predecessors, (87), 13 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-22 15:40:03,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 353 transitions. [2022-07-22 15:40:03,521 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 353 transitions. Word has length 59 [2022-07-22 15:40:03,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:40:03,522 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 353 transitions. [2022-07-22 15:40:03,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-07-22 15:40:03,522 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 353 transitions. [2022-07-22 15:40:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 15:40:03,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:40:03,523 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:40:03,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 15:40:03,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 15:40:03,739 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:40:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:40:03,740 INFO L85 PathProgramCache]: Analyzing trace with hash -70799180, now seen corresponding path program 1 times [2022-07-22 15:40:03,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:40:03,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773264909] [2022-07-22 15:40:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:40:03,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:40:03,747 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:40:03,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819610809] [2022-07-22 15:40:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:40:03,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:40:03,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:40:03,749 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) [2022-07-22 15:40:03,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 15:40:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:40:03,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 15:40:03,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:40:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 15:40:03,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:40:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 15:40:04,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:40:04,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773264909] [2022-07-22 15:40:04,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:40:04,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819610809] [2022-07-22 15:40:04,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819610809] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:40:04,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:40:04,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-07-22 15:40:04,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494783664] [2022-07-22 15:40:04,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:40:04,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 15:40:04,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:40:04,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 15:40:04,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-22 15:40:04,013 INFO L87 Difference]: Start difference. First operand 251 states and 353 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 15:40:04,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:40:04,465 INFO L93 Difference]: Finished difference Result 300 states and 419 transitions. [2022-07-22 15:40:04,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 15:40:04,467 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 57 [2022-07-22 15:40:04,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:40:04,469 INFO L225 Difference]: With dead ends: 300 [2022-07-22 15:40:04,469 INFO L226 Difference]: Without dead ends: 298 [2022-07-22 15:40:04,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-07-22 15:40:04,470 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 74 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:40:04,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 248 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:40:04,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-07-22 15:40:04,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 263. [2022-07-22 15:40:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 159 states have (on average 1.1886792452830188) internal successors, (189), 166 states have internal predecessors, (189), 87 states have call successors, (87), 16 states have call predecessors, (87), 16 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-22 15:40:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 362 transitions. [2022-07-22 15:40:04,541 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 362 transitions. Word has length 57 [2022-07-22 15:40:04,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:40:04,541 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 362 transitions. [2022-07-22 15:40:04,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 15:40:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 362 transitions. [2022-07-22 15:40:04,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 15:40:04,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:40:04,542 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:40:04,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 15:40:04,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 15:40:04,763 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:40:04,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:40:04,764 INFO L85 PathProgramCache]: Analyzing trace with hash 513336511, now seen corresponding path program 2 times [2022-07-22 15:40:04,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:40:04,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157016696] [2022-07-22 15:40:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:40:04,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:40:04,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:40:04,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364674020] [2022-07-22 15:40:04,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:40:04,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:40:04,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:40:04,773 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) [2022-07-22 15:40:04,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 15:40:04,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:40:04,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:40:04,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 15:40:04,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:40:04,851 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 15:40:04,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 15:40:04,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:40:04,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157016696] [2022-07-22 15:40:04,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:40:04,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364674020] [2022-07-22 15:40:04,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364674020] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:40:04,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:40:04,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 15:40:04,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780031901] [2022-07-22 15:40:04,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:40:04,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 15:40:04,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:40:04,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 15:40:04,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 15:40:04,853 INFO L87 Difference]: Start difference. First operand 263 states and 362 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 15:40:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:40:04,946 INFO L93 Difference]: Finished difference Result 457 states and 635 transitions. [2022-07-22 15:40:04,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 15:40:04,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-07-22 15:40:04,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:40:04,948 INFO L225 Difference]: With dead ends: 457 [2022-07-22 15:40:04,948 INFO L226 Difference]: Without dead ends: 287 [2022-07-22 15:40:04,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:40:04,949 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:40:04,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 82 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:40:04,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-22 15:40:05,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 272. [2022-07-22 15:40:05,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 168 states have (on average 1.1904761904761905) internal successors, (200), 169 states have internal predecessors, (200), 87 states have call successors, (87), 16 states have call predecessors, (87), 16 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-07-22 15:40:05,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 373 transitions. [2022-07-22 15:40:05,009 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 373 transitions. Word has length 62 [2022-07-22 15:40:05,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:40:05,009 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 373 transitions. [2022-07-22 15:40:05,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 15:40:05,009 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 373 transitions. [2022-07-22 15:40:05,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-22 15:40:05,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:40:05,010 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:40:05,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 15:40:05,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 15:40:05,234 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:40:05,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:40:05,234 INFO L85 PathProgramCache]: Analyzing trace with hash -420355271, now seen corresponding path program 3 times [2022-07-22 15:40:05,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:40:05,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615994646] [2022-07-22 15:40:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:40:05,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:40:05,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:40:05,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375949131] [2022-07-22 15:40:05,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:40:05,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:40:05,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:40:05,284 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:40:05,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 15:40:05,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 15:40:05,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:40:05,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-22 15:40:05,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:40:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 15:40:05,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:40:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 15:40:13,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:40:13,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615994646] [2022-07-22 15:40:13,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:40:13,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375949131] [2022-07-22 15:40:13,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375949131] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:40:13,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:40:13,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-07-22 15:40:13,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395255082] [2022-07-22 15:40:13,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:40:13,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 15:40:13,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:40:13,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 15:40:13,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=638, Unknown=1, NotChecked=0, Total=756 [2022-07-22 15:40:13,271 INFO L87 Difference]: Start difference. First operand 272 states and 373 transitions. Second operand has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-22 15:40:30,291 WARN L233 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 115 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:40:36,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:40:46,279 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:01,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:41:01,333 INFO L93 Difference]: Finished difference Result 396 states and 534 transitions. [2022-07-22 15:41:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-22 15:41:01,335 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 62 [2022-07-22 15:41:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:41:01,337 INFO L225 Difference]: With dead ends: 396 [2022-07-22 15:41:01,338 INFO L226 Difference]: Without dead ends: 394 [2022-07-22 15:41:01,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 101 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 40.5s TimeCoverageRelationStatistics Valid=1101, Invalid=4448, Unknown=1, NotChecked=0, Total=5550 [2022-07-22 15:41:01,340 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 211 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:41:01,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 372 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1388 Invalid, 0 Unknown, 325 Unchecked, 13.1s Time] [2022-07-22 15:41:01,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-07-22 15:41:01,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 372. [2022-07-22 15:41:01,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 236 states have (on average 1.1694915254237288) internal successors, (276), 240 states have internal predecessors, (276), 113 states have call successors, (113), 22 states have call predecessors, (113), 22 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2022-07-22 15:41:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 501 transitions. [2022-07-22 15:41:01,439 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 501 transitions. Word has length 62 [2022-07-22 15:41:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:41:01,439 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 501 transitions. [2022-07-22 15:41:01,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 8 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-22 15:41:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 501 transitions. [2022-07-22 15:41:01,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 15:41:01,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:41:01,441 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:41:01,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 15:41:01,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:41:01,648 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:41:01,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:41:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash -819166674, now seen corresponding path program 1 times [2022-07-22 15:41:01,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:41:01,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891598272] [2022-07-22 15:41:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:41:01,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:41:01,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:41:01,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149647814] [2022-07-22 15:41:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:41:01,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:41:01,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:41:01,657 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:41:01,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 15:41:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:41:01,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-22 15:41:01,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:41:02,371 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-22 15:41:02,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:41:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-22 15:41:04,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:41:04,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891598272] [2022-07-22 15:41:04,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:41:04,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149647814] [2022-07-22 15:41:04,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149647814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:41:04,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:41:04,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-07-22 15:41:04,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230852058] [2022-07-22 15:41:04,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:41:04,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 15:41:04,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:41:04,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 15:41:04,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-07-22 15:41:04,029 INFO L87 Difference]: Start difference. First operand 372 states and 501 transitions. Second operand has 27 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-22 15:41:11,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:14,666 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:20,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:22,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:26,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:28,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:31,087 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:37,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:39,398 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:42,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:44,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:47,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:51,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:57,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:41:59,315 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:42:01,570 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:42:05,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:42:07,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:42:09,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 15:42:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:42:11,242 INFO L93 Difference]: Finished difference Result 621 states and 887 transitions. [2022-07-22 15:42:11,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 15:42:11,243 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 76 [2022-07-22 15:42:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:42:11,245 INFO L225 Difference]: With dead ends: 621 [2022-07-22 15:42:11,245 INFO L226 Difference]: Without dead ends: 617 [2022-07-22 15:42:11,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=1082, Invalid=5398, Unknown=0, NotChecked=0, Total=6480 [2022-07-22 15:42:11,247 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 200 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 2143 mSolverCounterSat, 522 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 2143 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:42:11,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 414 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [522 Valid, 2143 Invalid, 18 Unknown, 0 Unchecked, 52.2s Time] [2022-07-22 15:42:11,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-07-22 15:42:11,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 569. [2022-07-22 15:42:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 335 states have (on average 1.2059701492537314) internal successors, (404), 339 states have internal predecessors, (404), 205 states have call successors, (205), 28 states have call predecessors, (205), 28 states have return successors, (204), 201 states have call predecessors, (204), 204 states have call successors, (204) [2022-07-22 15:42:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 813 transitions. [2022-07-22 15:42:11,471 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 813 transitions. Word has length 76 [2022-07-22 15:42:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:42:11,471 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 813 transitions. [2022-07-22 15:42:11,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2022-07-22 15:42:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 813 transitions. [2022-07-22 15:42:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 15:42:11,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:42:11,473 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:42:11,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-22 15:42:11,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 15:42:11,673 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:42:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:42:11,673 INFO L85 PathProgramCache]: Analyzing trace with hash 685229769, now seen corresponding path program 1 times [2022-07-22 15:42:11,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:42:11,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043812989] [2022-07-22 15:42:11,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:42:11,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:42:11,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:42:11,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875345842] [2022-07-22 15:42:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:42:11,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:42:11,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:42:11,681 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:42:11,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 15:42:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:42:11,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 15:42:11,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:42:12,015 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 46 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-22 15:42:12,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:42:12,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:42:12,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043812989] [2022-07-22 15:42:12,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:42:12,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875345842] [2022-07-22 15:42:12,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875345842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:42:12,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:42:12,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-22 15:42:12,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598525398] [2022-07-22 15:42:12,075 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 15:42:12,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 15:42:12,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:42:12,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 15:42:12,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-07-22 15:42:12,076 INFO L87 Difference]: Start difference. First operand 569 states and 813 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-22 15:42:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:42:12,584 INFO L93 Difference]: Finished difference Result 603 states and 861 transitions. [2022-07-22 15:42:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 15:42:12,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2022-07-22 15:42:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:42:12,588 INFO L225 Difference]: With dead ends: 603 [2022-07-22 15:42:12,588 INFO L226 Difference]: Without dead ends: 601 [2022-07-22 15:42:12,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-22 15:42:12,589 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 39 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:42:12,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 194 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:42:12,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-07-22 15:42:12,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 598. [2022-07-22 15:42:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 350 states have (on average 1.2085714285714286) internal successors, (423), 354 states have internal predecessors, (423), 217 states have call successors, (217), 30 states have call predecessors, (217), 30 states have return successors, (216), 213 states have call predecessors, (216), 216 states have call successors, (216) [2022-07-22 15:42:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 856 transitions. [2022-07-22 15:42:12,823 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 856 transitions. Word has length 79 [2022-07-22 15:42:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:42:12,823 INFO L495 AbstractCegarLoop]: Abstraction has 598 states and 856 transitions. [2022-07-22 15:42:12,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-22 15:42:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 856 transitions. [2022-07-22 15:42:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 15:42:12,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:42:12,828 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:42:12,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 15:42:13,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 15:42:13,040 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:42:13,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:42:13,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1959088841, now seen corresponding path program 2 times [2022-07-22 15:42:13,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:42:13,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31898034] [2022-07-22 15:42:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:42:13,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:42:13,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:42:13,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493746331] [2022-07-22 15:42:13,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:42:13,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:42:13,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:42:13,048 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:42:13,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 15:42:13,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:42:13,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:42:13,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 15:42:13,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:42:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-22 15:42:13,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:42:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-22 15:42:13,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:42:13,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31898034] [2022-07-22 15:42:13,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:42:13,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493746331] [2022-07-22 15:42:13,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493746331] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:42:13,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 15:42:13,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2022-07-22 15:42:13,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715084934] [2022-07-22 15:42:13,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 15:42:13,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 15:42:13,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:42:13,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 15:42:13,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-22 15:42:13,240 INFO L87 Difference]: Start difference. First operand 598 states and 856 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-22 15:42:13,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:42:13,960 INFO L93 Difference]: Finished difference Result 713 states and 1019 transitions. [2022-07-22 15:42:13,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 15:42:13,960 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 84 [2022-07-22 15:42:13,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:42:13,963 INFO L225 Difference]: With dead ends: 713 [2022-07-22 15:42:13,963 INFO L226 Difference]: Without dead ends: 706 [2022-07-22 15:42:13,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2022-07-22 15:42:13,964 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 61 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:42:13,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 344 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:42:13,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-07-22 15:42:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 570. [2022-07-22 15:42:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 328 states have (on average 1.2164634146341464) internal successors, (399), 331 states have internal predecessors, (399), 211 states have call successors, (211), 30 states have call predecessors, (211), 30 states have return successors, (210), 208 states have call predecessors, (210), 210 states have call successors, (210) [2022-07-22 15:42:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 820 transitions. [2022-07-22 15:42:14,253 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 820 transitions. Word has length 84 [2022-07-22 15:42:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:42:14,253 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 820 transitions. [2022-07-22 15:42:14,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-22 15:42:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 820 transitions. [2022-07-22 15:42:14,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-22 15:42:14,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:42:14,256 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:42:14,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 15:42:14,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 15:42:14,472 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:42:14,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:42:14,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1810606754, now seen corresponding path program 2 times [2022-07-22 15:42:14,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:42:14,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770067869] [2022-07-22 15:42:14,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:42:14,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:42:14,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:42:14,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1628291745] [2022-07-22 15:42:14,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:42:14,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:42:14,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:42:14,479 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:42:14,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 15:42:14,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:42:14,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:42:14,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-22 15:42:14,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:42:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 92 proven. 55 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-07-22 15:42:15,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:42:25,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:42:25,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770067869] [2022-07-22 15:42:25,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 15:42:25,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628291745] [2022-07-22 15:42:25,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628291745] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:42:25,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 15:42:25,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-22 15:42:25,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962369950] [2022-07-22 15:42:25,179 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 15:42:25,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 15:42:25,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:42:25,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 15:42:25,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=567, Unknown=1, NotChecked=0, Total=702 [2022-07-22 15:42:25,180 INFO L87 Difference]: Start difference. First operand 570 states and 820 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-22 15:42:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:42:27,281 INFO L93 Difference]: Finished difference Result 662 states and 951 transitions. [2022-07-22 15:42:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 15:42:27,282 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), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 96 [2022-07-22 15:42:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:42:27,284 INFO L225 Difference]: With dead ends: 662 [2022-07-22 15:42:27,284 INFO L226 Difference]: Without dead ends: 659 [2022-07-22 15:42:27,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=185, Invalid=806, Unknown=1, NotChecked=0, Total=992 [2022-07-22 15:42:27,285 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 46 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:42:27,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 279 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 15:42:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-07-22 15:42:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 574. [2022-07-22 15:42:27,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 331 states have (on average 1.2145015105740182) internal successors, (402), 334 states have internal predecessors, (402), 211 states have call successors, (211), 31 states have call predecessors, (211), 31 states have return successors, (210), 208 states have call predecessors, (210), 210 states have call successors, (210) [2022-07-22 15:42:27,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 823 transitions. [2022-07-22 15:42:27,562 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 823 transitions. Word has length 96 [2022-07-22 15:42:27,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:42:27,562 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 823 transitions. [2022-07-22 15:42:27,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-22 15:42:27,563 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 823 transitions. [2022-07-22 15:42:27,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-22 15:42:27,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:42:27,565 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:42:27,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-22 15:42:27,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:42:27,773 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:42:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:42:27,773 INFO L85 PathProgramCache]: Analyzing trace with hash -717331702, now seen corresponding path program 2 times [2022-07-22 15:42:27,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:42:27,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097134168] [2022-07-22 15:42:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:42:27,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:42:27,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 15:42:27,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1759478941] [2022-07-22 15:42:27,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:42:27,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:42:27,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:42:27,782 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:42:27,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 15:42:27,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:42:27,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:42:27,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-22 15:42:27,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:42:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 112 proven. 50 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-07-22 15:42:30,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:42:36,436 WARN L855 $PredicateComparison]: unable to prove that (or (let ((.cse0 (= |c_ULTIMATE.start_main_~r~0#1| 0)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1| (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)))) (and (or (not .cse0) (not (= .cse1 0)) (let ((.cse2 (+ (* (- 1) |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) |c_ULTIMATE.start_main_~b~0#1|))) (and (or (not (= (mod .cse2 |c_ULTIMATE.start_main_~s~0#1|) 0)) (= |c_ULTIMATE.start_main_~s~0#1| 0)) (not (= .cse2 0))))) (or .cse0 (not (= (+ (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* |c_ULTIMATE.start_main_~s~0#1| (div .cse1 |c_ULTIMATE.start_main_~r~0#1|))) |c_ULTIMATE.start_main_~b~0#1|)) (not (= (mod .cse1 |c_ULTIMATE.start_main_~r~0#1|) 0))))) (= (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~k~0#1|)) |c_ULTIMATE.start_main_~a~0#1|)) is different from true [2022-07-22 15:43:42,488 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (and (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|))) (or (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|) .cse0 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|)) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|) 0) (= (* |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96| (div (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|)) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|)) .cse0)))) (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int)) (or (forall ((|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96| Int)) (let ((.cse1 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|))) (or (= .cse1 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|) .cse1 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|)) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|) 0)))) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|)) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) 0))) (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int) (|v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96| Int)) (let ((.cse2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|))) (or (= .cse2 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|) .cse2 (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~q~0#1_BEFORE_CALL_84|)) |v_ULTIMATE.start_main_~s~0#1_BEFORE_CALL_96|) 0)))) (forall ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| Int) (|v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| Int)) (or (= |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74| 0) (= (mod (+ (* (- 1) |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_76| |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_99| |v_ULTIMATE.start_main_~p~0#1_BEFORE_CALL_74|)) |v_ULTIMATE.start_main_~r~0#1_BEFORE_CALL_74|) 0)))))) is different from true