./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.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 bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 00:17:32,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 00:17:32,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 00:17:32,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 00:17:32,273 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 00:17:32,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 00:17:32,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 00:17:32,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 00:17:32,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 00:17:32,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 00:17:32,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 00:17:32,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 00:17:32,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 00:17:32,289 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 00:17:32,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 00:17:32,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 00:17:32,294 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 00:17:32,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 00:17:32,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 00:17:32,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 00:17:32,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 00:17:32,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 00:17:32,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 00:17:32,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 00:17:32,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 00:17:32,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 00:17:32,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 00:17:32,308 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 00:17:32,309 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 00:17:32,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 00:17:32,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 00:17:32,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 00:17:32,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 00:17:32,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 00:17:32,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 00:17:32,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 00:17:32,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 00:17:32,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 00:17:32,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 00:17:32,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 00:17:32,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 00:17:32,315 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 00:17:32,334 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 00:17:32,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 00:17:32,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 00:17:32,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 00:17:32,338 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 00:17:32,338 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 00:17:32,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 00:17:32,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 00:17:32,339 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 00:17:32,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 00:17:32,340 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 00:17:32,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 00:17:32,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 00:17:32,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 00:17:32,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 00:17:32,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 00:17:32,341 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 00:17:32,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 00:17:32,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 00:17:32,341 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 00:17:32,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 00:17:32,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 00:17:32,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 00:17:32,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 00:17:32,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:17:32,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 00:17:32,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 00:17:32,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 00:17:32,349 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 00:17:32,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 00:17:32,350 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 00:17:32,350 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 00:17:32,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 00:17:32,350 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bda512f5ab4e84c08e80fd02a1c07c8fba5ca60aa45d55edfde2cc268dd1288e [2021-12-28 00:17:32,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 00:17:32,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 00:17:32,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 00:17:32,639 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 00:17:32,640 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 00:17:32,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2021-12-28 00:17:32,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a29eadfdc/a5a41de9755b45e8a6a906c472d3a841/FLAG9a6bd06b7 [2021-12-28 00:17:32,999 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 00:17:32,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c [2021-12-28 00:17:33,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a29eadfdc/a5a41de9755b45e8a6a906c472d3a841/FLAG9a6bd06b7 [2021-12-28 00:17:33,452 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a29eadfdc/a5a41de9755b45e8a6a906c472d3a841 [2021-12-28 00:17:33,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 00:17:33,455 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 00:17:33,456 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 00:17:33,456 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 00:17:33,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 00:17:33,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:17:33" (1/1) ... [2021-12-28 00:17:33,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a1a2545 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:17:33, skipping insertion in model container [2021-12-28 00:17:33,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:17:33" (1/1) ... [2021-12-28 00:17:33,465 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 00:17:33,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 00:17:33,572 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2021-12-28 00:17:33,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:17:33,608 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 00:17:33,615 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound2.c[490,503] [2021-12-28 00:17:33,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:17:33,630 INFO L208 MainTranslator]: Completed translation [2021-12-28 00:17:33,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:17:33 WrapperNode [2021-12-28 00:17:33,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 00:17:33,643 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 00:17:33,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 00:17:33,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 00:17:33,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:17:33" (1/1) ... [2021-12-28 00:17:33,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:17:33" (1/1) ... [2021-12-28 00:17:33,699 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2021-12-28 00:17:33,700 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 00:17:33,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 00:17:33,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 00:17:33,701 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 00:17:33,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:17:33" (1/1) ... [2021-12-28 00:17:33,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:17:33" (1/1) ... [2021-12-28 00:17:33,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:17:33" (1/1) ... [2021-12-28 00:17:33,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:17:33" (1/1) ... [2021-12-28 00:17:33,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:17:33" (1/1) ... [2021-12-28 00:17:33,726 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:17:33" (1/1) ... [2021-12-28 00:17:33,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:17:33" (1/1) ... [2021-12-28 00:17:33,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 00:17:33,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 00:17:33,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 00:17:33,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 00:17:33,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:17:33" (1/1) ... [2021-12-28 00:17:33,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:17:33,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:33,752 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 00:17:33,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 00:17:33,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 00:17:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 00:17:33,779 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 00:17:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 00:17:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 00:17:33,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 00:17:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 00:17:33,779 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 00:17:33,825 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 00:17:33,826 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 00:17:33,944 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 00:17:33,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 00:17:33,948 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 00:17:33,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:17:33 BoogieIcfgContainer [2021-12-28 00:17:33,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 00:17:33,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 00:17:33,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 00:17:33,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 00:17:33,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 12:17:33" (1/3) ... [2021-12-28 00:17:33,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a868eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:17:33, skipping insertion in model container [2021-12-28 00:17:33,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:17:33" (2/3) ... [2021-12-28 00:17:33,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52a868eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:17:33, skipping insertion in model container [2021-12-28 00:17:33,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:17:33" (3/3) ... [2021-12-28 00:17:33,954 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound2.c [2021-12-28 00:17:33,957 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 00:17:33,958 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 00:17:34,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 00:17:34,038 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 00:17:34,039 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 00:17:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-28 00:17:34,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 00:17:34,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:34,061 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:17:34,061 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:34,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:34,069 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2021-12-28 00:17:34,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:34,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121357032] [2021-12-28 00:17:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:34,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:34,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 00:17:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:34,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 00:17:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:34,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 00:17:34,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:34,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 00:17:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 00:17:34,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:34,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121357032] [2021-12-28 00:17:34,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121357032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:17:34,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:17:34,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 00:17:34,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619623026] [2021-12-28 00:17:34,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:17:34,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 00:17:34,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:34,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 00:17:34,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 00:17:34,276 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 00:17:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:34,297 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2021-12-28 00:17:34,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 00:17:34,300 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-28 00:17:34,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:34,304 INFO L225 Difference]: With dead ends: 67 [2021-12-28 00:17:34,305 INFO L226 Difference]: Without dead ends: 31 [2021-12-28 00:17:34,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 00:17:34,312 INFO L933 BasicCegarLoop]: 44 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, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:34,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:17:34,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-28 00:17:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-28 00:17:34,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 00:17:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-12-28 00:17:34,339 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2021-12-28 00:17:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:34,339 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-12-28 00:17:34,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-28 00:17:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-12-28 00:17:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 00:17:34,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:34,341 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:17:34,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 00:17:34,342 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:34,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:34,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2021-12-28 00:17:34,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:34,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590960860] [2021-12-28 00:17:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:34,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:34,364 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:34,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772607109] [2021-12-28 00:17:34,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:34,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:34,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:34,380 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:17:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:34,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 00:17:34,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 00:17:34,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:34,514 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 00:17:34,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:17:34,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:34,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590960860] [2021-12-28 00:17:34,515 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:34,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772607109] [2021-12-28 00:17:34,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772607109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:17:34,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:17:34,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 00:17:34,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355654295] [2021-12-28 00:17:34,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:17:34,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:17:34,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:17:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:17:34,517 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:17:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:34,616 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-12-28 00:17:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 00:17:34,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-12-28 00:17:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:34,617 INFO L225 Difference]: With dead ends: 50 [2021-12-28 00:17:34,617 INFO L226 Difference]: Without dead ends: 43 [2021-12-28 00:17:34,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:17:34,619 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:34,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 135 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:17:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-28 00:17:34,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-28 00:17:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 00:17:34,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-28 00:17:34,626 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2021-12-28 00:17:34,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:34,627 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-28 00:17:34,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:17:34,627 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-28 00:17:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-28 00:17:34,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:34,628 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:17:34,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 00:17:34,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:34,842 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:34,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2021-12-28 00:17:34,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:34,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913411687] [2021-12-28 00:17:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:34,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:34,864 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:34,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1538089852] [2021-12-28 00:17:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:34,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:34,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:34,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:17:34,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 00:17:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:34,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-28 00:17:34,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 00:17:35,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:17:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 00:17:35,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:35,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913411687] [2021-12-28 00:17:35,397 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:35,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538089852] [2021-12-28 00:17:35,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538089852] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 00:17:35,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:17:35,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2021-12-28 00:17:35,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7054521] [2021-12-28 00:17:35,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:17:35,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 00:17:35,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:35,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 00:17:35,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:17:35,400 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:17:35,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:35,457 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-12-28 00:17:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 00:17:35,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-12-28 00:17:35,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:35,458 INFO L225 Difference]: With dead ends: 49 [2021-12-28 00:17:35,458 INFO L226 Difference]: Without dead ends: 47 [2021-12-28 00:17:35,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-28 00:17:35,459 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:35,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:17:35,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-28 00:17:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-28 00:17:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-28 00:17:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-12-28 00:17:35,480 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2021-12-28 00:17:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:35,481 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-12-28 00:17:35,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:17:35,481 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-12-28 00:17:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-28 00:17:35,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:35,482 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:17:35,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-28 00:17:35,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-28 00:17:35,689 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:35,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:35,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2021-12-28 00:17:35,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:35,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011187796] [2021-12-28 00:17:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:35,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:35,700 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:35,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840877697] [2021-12-28 00:17:35,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:35,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:35,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:35,702 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:17:35,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 00:17:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:35,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 00:17:35,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 00:17:35,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:17:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 00:17:35,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:35,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011187796] [2021-12-28 00:17:35,930 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:35,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840877697] [2021-12-28 00:17:35,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840877697] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:17:35,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:17:35,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-28 00:17:35,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012688290] [2021-12-28 00:17:35,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:17:35,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 00:17:35,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:35,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 00:17:35,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-28 00:17:35,932 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 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) [2021-12-28 00:17:36,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:36,082 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2021-12-28 00:17:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 00:17:36,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 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 35 [2021-12-28 00:17:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:36,084 INFO L225 Difference]: With dead ends: 99 [2021-12-28 00:17:36,084 INFO L226 Difference]: Without dead ends: 92 [2021-12-28 00:17:36,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:17:36,085 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 58 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:36,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 308 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:17:36,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-28 00:17:36,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-12-28 00:17:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-28 00:17:36,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2021-12-28 00:17:36,095 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2021-12-28 00:17:36,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:36,095 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2021-12-28 00:17:36,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 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) [2021-12-28 00:17:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2021-12-28 00:17:36,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-28 00:17:36,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:36,096 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:17:36,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 00:17:36,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:36,311 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:36,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:36,312 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2021-12-28 00:17:36,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:36,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846704700] [2021-12-28 00:17:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:36,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:36,321 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:36,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485045851] [2021-12-28 00:17:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:36,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:36,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:36,325 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:17:36,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 00:17:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:36,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-28 00:17:36,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 00:17:36,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:17:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 00:17:36,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:36,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846704700] [2021-12-28 00:17:36,733 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:36,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485045851] [2021-12-28 00:17:36,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485045851] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 00:17:36,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:17:36,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2021-12-28 00:17:36,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947682580] [2021-12-28 00:17:36,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:17:36,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 00:17:36,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:36,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 00:17:36,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:17:36,736 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-12-28 00:17:36,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:36,783 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2021-12-28 00:17:36,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 00:17:36,784 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 38 [2021-12-28 00:17:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:36,787 INFO L225 Difference]: With dead ends: 75 [2021-12-28 00:17:36,788 INFO L226 Difference]: Without dead ends: 73 [2021-12-28 00:17:36,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-12-28 00:17:36,790 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 21 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:36,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 172 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:17:36,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-28 00:17:36,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-12-28 00:17:36,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-28 00:17:36,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-12-28 00:17:36,807 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2021-12-28 00:17:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:36,807 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-12-28 00:17:36,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-12-28 00:17:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-12-28 00:17:36,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-28 00:17:36,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:36,808 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:17:36,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 00:17:37,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:37,026 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:37,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:37,030 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2021-12-28 00:17:37,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:37,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282418265] [2021-12-28 00:17:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:37,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:37,040 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:37,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923454371] [2021-12-28 00:17:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:37,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:37,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:37,041 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:17:37,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 00:17:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:37,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-28 00:17:37,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 00:17:37,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:17:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 00:17:37,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:37,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282418265] [2021-12-28 00:17:37,299 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:37,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923454371] [2021-12-28 00:17:37,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923454371] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:17:37,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:17:37,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-28 00:17:37,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141666518] [2021-12-28 00:17:37,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:17:37,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 00:17:37,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 00:17:37,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:17:37,301 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:17:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:37,331 INFO L93 Difference]: Finished difference Result 87 states and 112 transitions. [2021-12-28 00:17:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 00:17:37,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-12-28 00:17:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:37,333 INFO L225 Difference]: With dead ends: 87 [2021-12-28 00:17:37,333 INFO L226 Difference]: Without dead ends: 85 [2021-12-28 00:17:37,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-28 00:17:37,335 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:37,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 191 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2021-12-28 00:17:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-28 00:17:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-12-28 00:17:37,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 60 states have internal predecessors, (71), 18 states have call successors, (18), 5 states have call predecessors, (18), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-28 00:17:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2021-12-28 00:17:37,347 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 38 [2021-12-28 00:17:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:37,348 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2021-12-28 00:17:37,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:17:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2021-12-28 00:17:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 00:17:37,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:37,349 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:17:37,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 00:17:37,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:37,565 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:37,565 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2021-12-28 00:17:37,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:37,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175223187] [2021-12-28 00:17:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:37,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:37,573 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:37,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446436847] [2021-12-28 00:17:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:37,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:37,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:37,583 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:17:37,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 00:17:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:37,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 00:17:37,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 00:17:37,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:17:37,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:37,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175223187] [2021-12-28 00:17:37,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:37,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446436847] [2021-12-28 00:17:37,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446436847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:17:37,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:17:37,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 00:17:37,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910078533] [2021-12-28 00:17:37,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:17:37,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:17:37,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:37,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:17:37,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 00:17:37,748 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 00:17:37,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:37,788 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2021-12-28 00:17:37,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 00:17:37,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-12-28 00:17:37,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:37,789 INFO L225 Difference]: With dead ends: 112 [2021-12-28 00:17:37,789 INFO L226 Difference]: Without dead ends: 110 [2021-12-28 00:17:37,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:17:37,790 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:37,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 135 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:17:37,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-28 00:17:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2021-12-28 00:17:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 71 states have internal predecessors, (86), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-28 00:17:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2021-12-28 00:17:37,799 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 43 [2021-12-28 00:17:37,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:37,799 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2021-12-28 00:17:37,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 00:17:37,799 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2021-12-28 00:17:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 00:17:37,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:37,800 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-28 00:17:37,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 00:17:38,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:38,016 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:38,017 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2021-12-28 00:17:38,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:38,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151768498] [2021-12-28 00:17:38,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:38,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:38,030 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:38,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757313287] [2021-12-28 00:17:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:38,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:38,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:38,055 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:17:38,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 00:17:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:38,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-28 00:17:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 00:17:38,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:17:38,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:38,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151768498] [2021-12-28 00:17:38,267 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:38,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757313287] [2021-12-28 00:17:38,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757313287] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:17:38,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:17:38,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-28 00:17:38,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591268421] [2021-12-28 00:17:38,267 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 00:17:38,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 00:17:38,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:38,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 00:17:38,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:17:38,269 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2021-12-28 00:17:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:38,362 INFO L93 Difference]: Finished difference Result 135 states and 183 transitions. [2021-12-28 00:17:38,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 00:17:38,363 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 43 [2021-12-28 00:17:38,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:38,364 INFO L225 Difference]: With dead ends: 135 [2021-12-28 00:17:38,364 INFO L226 Difference]: Without dead ends: 133 [2021-12-28 00:17:38,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:17:38,365 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:38,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 242 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:17:38,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-28 00:17:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2021-12-28 00:17:38,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 84 states have internal predecessors, (102), 38 states have call successors, (38), 8 states have call predecessors, (38), 8 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2021-12-28 00:17:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 177 transitions. [2021-12-28 00:17:38,376 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 177 transitions. Word has length 43 [2021-12-28 00:17:38,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:38,376 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 177 transitions. [2021-12-28 00:17:38,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2021-12-28 00:17:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 177 transitions. [2021-12-28 00:17:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 00:17:38,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:38,377 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:17:38,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-28 00:17:38,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:38,591 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2021-12-28 00:17:38,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:38,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244951960] [2021-12-28 00:17:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:38,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:38,599 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:38,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073306089] [2021-12-28 00:17:38,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 00:17:38,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:38,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:38,601 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:17:38,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 00:17:38,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 00:17:38,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:17:38,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 00:17:38,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-28 00:17:38,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:17:38,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:38,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244951960] [2021-12-28 00:17:38,701 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:38,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073306089] [2021-12-28 00:17:38,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073306089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:17:38,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:17:38,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 00:17:38,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815567131] [2021-12-28 00:17:38,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:17:38,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:17:38,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:38,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:17:38,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 00:17:38,703 INFO L87 Difference]: Start difference. First operand 129 states and 177 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:17:38,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:38,765 INFO L93 Difference]: Finished difference Result 168 states and 229 transitions. [2021-12-28 00:17:38,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 00:17:38,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-12-28 00:17:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:38,769 INFO L225 Difference]: With dead ends: 168 [2021-12-28 00:17:38,769 INFO L226 Difference]: Without dead ends: 112 [2021-12-28 00:17:38,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-28 00:17:38,773 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:38,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 164 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:17:38,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-28 00:17:38,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2021-12-28 00:17:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 67 states have internal predecessors, (77), 30 states have call successors, (30), 8 states have call predecessors, (30), 8 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-28 00:17:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 136 transitions. [2021-12-28 00:17:38,784 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 136 transitions. Word has length 43 [2021-12-28 00:17:38,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:38,784 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 136 transitions. [2021-12-28 00:17:38,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-28 00:17:38,784 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 136 transitions. [2021-12-28 00:17:38,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-28 00:17:38,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:38,788 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:17:38,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-28 00:17:39,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-28 00:17:39,016 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:39,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2021-12-28 00:17:39,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:39,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565192724] [2021-12-28 00:17:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:39,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:39,029 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:39,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471553373] [2021-12-28 00:17:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:39,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:39,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:39,031 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:17:39,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 00:17:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:39,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 00:17:39,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-28 00:17:39,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:17:39,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:39,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565192724] [2021-12-28 00:17:39,148 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:39,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471553373] [2021-12-28 00:17:39,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471553373] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:17:39,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:17:39,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 00:17:39,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560648954] [2021-12-28 00:17:39,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:17:39,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:17:39,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:17:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 00:17:39,150 INFO L87 Difference]: Start difference. First operand 104 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 00:17:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:39,185 INFO L93 Difference]: Finished difference Result 154 states and 217 transitions. [2021-12-28 00:17:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 00:17:39,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-12-28 00:17:39,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:39,186 INFO L225 Difference]: With dead ends: 154 [2021-12-28 00:17:39,186 INFO L226 Difference]: Without dead ends: 152 [2021-12-28 00:17:39,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:17:39,187 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:39,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:17:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-28 00:17:39,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2021-12-28 00:17:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 80 states have internal predecessors, (85), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2021-12-28 00:17:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 190 transitions. [2021-12-28 00:17:39,199 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 190 transitions. Word has length 48 [2021-12-28 00:17:39,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:39,199 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 190 transitions. [2021-12-28 00:17:39,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 00:17:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 190 transitions. [2021-12-28 00:17:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-28 00:17:39,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:39,200 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2021-12-28 00:17:39,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 00:17:39,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-28 00:17:39,417 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:39,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1402581238, now seen corresponding path program 1 times [2021-12-28 00:17:39,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:39,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953561814] [2021-12-28 00:17:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:39,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:39,426 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:39,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833167825] [2021-12-28 00:17:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:39,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:39,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:39,428 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:17:39,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 00:17:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:39,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-28 00:17:39,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-28 00:17:39,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:17:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-28 00:17:39,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:39,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953561814] [2021-12-28 00:17:39,646 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:39,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833167825] [2021-12-28 00:17:39,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833167825] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:17:39,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:17:39,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-12-28 00:17:39,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26570588] [2021-12-28 00:17:39,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:17:39,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 00:17:39,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:39,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 00:17:39,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-28 00:17:39,648 INFO L87 Difference]: Start difference. First operand 136 states and 190 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 00:17:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:39,699 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2021-12-28 00:17:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 00:17:39,700 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 60 [2021-12-28 00:17:39,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:39,701 INFO L225 Difference]: With dead ends: 142 [2021-12-28 00:17:39,701 INFO L226 Difference]: Without dead ends: 140 [2021-12-28 00:17:39,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-28 00:17:39,702 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:39,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 142 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:17:39,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-28 00:17:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-12-28 00:17:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 83 states have internal predecessors, (88), 53 states have call successors, (53), 10 states have call predecessors, (53), 10 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2021-12-28 00:17:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 193 transitions. [2021-12-28 00:17:39,715 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 193 transitions. Word has length 60 [2021-12-28 00:17:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:39,716 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 193 transitions. [2021-12-28 00:17:39,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 00:17:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 193 transitions. [2021-12-28 00:17:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-28 00:17:39,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:39,717 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-12-28 00:17:39,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 00:17:39,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-28 00:17:39,933 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:39,933 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2021-12-28 00:17:39,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:39,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235192803] [2021-12-28 00:17:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:39,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:39,940 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:39,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305006161] [2021-12-28 00:17:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:39,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:39,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:39,942 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:17:39,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 00:17:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:39,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-28 00:17:39,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:40,366 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-28 00:17:40,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:17:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-28 00:17:40,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:40,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235192803] [2021-12-28 00:17:40,820 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:40,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305006161] [2021-12-28 00:17:40,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305006161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:17:40,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:17:40,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-12-28 00:17:40,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402355825] [2021-12-28 00:17:40,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:17:40,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 00:17:40,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:40,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 00:17:40,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-12-28 00:17:40,822 INFO L87 Difference]: Start difference. First operand 140 states and 193 transitions. Second operand has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-28 00:17:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:47,007 INFO L93 Difference]: Finished difference Result 281 states and 409 transitions. [2021-12-28 00:17:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-28 00:17:47,009 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2021-12-28 00:17:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:47,010 INFO L225 Difference]: With dead ends: 281 [2021-12-28 00:17:47,010 INFO L226 Difference]: Without dead ends: 277 [2021-12-28 00:17:47,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=302, Invalid=1420, Unknown=0, NotChecked=0, Total=1722 [2021-12-28 00:17:47,011 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 147 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:47,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 388 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-28 00:17:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-28 00:17:47,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 228. [2021-12-28 00:17:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 140 states have internal predecessors, (159), 81 states have call successors, (81), 13 states have call predecessors, (81), 13 states have return successors, (80), 74 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-28 00:17:47,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 320 transitions. [2021-12-28 00:17:47,045 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 320 transitions. Word has length 60 [2021-12-28 00:17:47,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:47,045 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 320 transitions. [2021-12-28 00:17:47,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-28 00:17:47,045 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 320 transitions. [2021-12-28 00:17:47,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-28 00:17:47,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:47,046 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:17:47,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 00:17:47,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-28 00:17:47,269 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:47,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:47,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2021-12-28 00:17:47,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:47,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132066982] [2021-12-28 00:17:47,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:47,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:47,276 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:47,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916733201] [2021-12-28 00:17:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:47,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:47,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:47,280 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:17:47,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 00:17:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:47,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-28 00:17:47,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-28 00:17:47,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:17:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-28 00:17:47,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:47,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132066982] [2021-12-28 00:17:47,741 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:47,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916733201] [2021-12-28 00:17:47,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916733201] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 00:17:47,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:17:47,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 14 [2021-12-28 00:17:47,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134196718] [2021-12-28 00:17:47,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:17:47,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:17:47,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:47,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:17:47,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-28 00:17:47,743 INFO L87 Difference]: Start difference. First operand 228 states and 320 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 00:17:47,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:47,825 INFO L93 Difference]: Finished difference Result 234 states and 325 transitions. [2021-12-28 00:17:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 00:17:47,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 70 [2021-12-28 00:17:47,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:47,827 INFO L225 Difference]: With dead ends: 234 [2021-12-28 00:17:47,827 INFO L226 Difference]: Without dead ends: 232 [2021-12-28 00:17:47,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-28 00:17:47,828 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:47,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 155 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:17:47,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-12-28 00:17:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-12-28 00:17:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 143 states have internal predecessors, (162), 81 states have call successors, (81), 14 states have call predecessors, (81), 14 states have return successors, (80), 74 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-28 00:17:47,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 323 transitions. [2021-12-28 00:17:47,863 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 323 transitions. Word has length 70 [2021-12-28 00:17:47,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:47,863 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 323 transitions. [2021-12-28 00:17:47,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 00:17:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 323 transitions. [2021-12-28 00:17:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 00:17:47,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:47,864 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:17:47,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 00:17:48,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-28 00:17:48,081 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:48,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:48,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2021-12-28 00:17:48,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:48,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528568764] [2021-12-28 00:17:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:48,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:48,088 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:48,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1432592005] [2021-12-28 00:17:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:48,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:48,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:48,091 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:17:48,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 00:17:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:48,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 00:17:48,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-28 00:17:48,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:17:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-28 00:17:48,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:48,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528568764] [2021-12-28 00:17:48,476 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:48,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432592005] [2021-12-28 00:17:48,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432592005] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:17:48,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:17:48,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-12-28 00:17:48,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342558711] [2021-12-28 00:17:48,476 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:17:48,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 00:17:48,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:48,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 00:17:48,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-12-28 00:17:48,477 INFO L87 Difference]: Start difference. First operand 232 states and 323 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-28 00:17:48,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:48,757 INFO L93 Difference]: Finished difference Result 347 states and 478 transitions. [2021-12-28 00:17:48,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 00:17:48,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 68 [2021-12-28 00:17:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:48,758 INFO L225 Difference]: With dead ends: 347 [2021-12-28 00:17:48,758 INFO L226 Difference]: Without dead ends: 228 [2021-12-28 00:17:48,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-12-28 00:17:48,760 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 45 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:48,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 415 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:17:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-12-28 00:17:48,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 210. [2021-12-28 00:17:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 118 states have (on average 1.1610169491525424) internal successors, (137), 124 states have internal predecessors, (137), 77 states have call successors, (77), 14 states have call predecessors, (77), 14 states have return successors, (76), 71 states have call predecessors, (76), 76 states have call successors, (76) [2021-12-28 00:17:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 290 transitions. [2021-12-28 00:17:48,800 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 290 transitions. Word has length 68 [2021-12-28 00:17:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:48,801 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 290 transitions. [2021-12-28 00:17:48,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 14 states have internal predecessors, (46), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-28 00:17:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 290 transitions. [2021-12-28 00:17:48,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-28 00:17:48,805 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:48,805 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 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, 1, 1, 1] [2021-12-28 00:17:48,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-28 00:17:49,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 00:17:49,015 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:49,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash 930066712, now seen corresponding path program 1 times [2021-12-28 00:17:49,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:49,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317135283] [2021-12-28 00:17:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:49,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:49,022 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:49,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373461401] [2021-12-28 00:17:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:49,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:49,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:49,027 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) [2021-12-28 00:17:49,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 00:17:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:49,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 00:17:49,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-28 00:17:49,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:17:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-28 00:17:49,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:49,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317135283] [2021-12-28 00:17:49,777 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:49,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373461401] [2021-12-28 00:17:49,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373461401] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:17:49,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:17:49,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-12-28 00:17:49,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620148650] [2021-12-28 00:17:49,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:17:49,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-28 00:17:49,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:49,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-28 00:17:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-12-28 00:17:49,779 INFO L87 Difference]: Start difference. First operand 210 states and 290 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-28 00:17:50,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:17:50,453 INFO L93 Difference]: Finished difference Result 317 states and 439 transitions. [2021-12-28 00:17:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 00:17:50,454 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) Word has length 85 [2021-12-28 00:17:50,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:17:50,456 INFO L225 Difference]: With dead ends: 317 [2021-12-28 00:17:50,456 INFO L226 Difference]: Without dead ends: 218 [2021-12-28 00:17:50,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 152 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=1163, Unknown=0, NotChecked=0, Total=1482 [2021-12-28 00:17:50,457 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 105 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 00:17:50,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 404 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 243 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2021-12-28 00:17:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-12-28 00:17:50,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2021-12-28 00:17:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 121 states have (on average 1.165289256198347) internal successors, (141), 127 states have internal predecessors, (141), 81 states have call successors, (81), 13 states have call predecessors, (81), 13 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-28 00:17:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 302 transitions. [2021-12-28 00:17:50,504 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 302 transitions. Word has length 85 [2021-12-28 00:17:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:17:50,504 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 302 transitions. [2021-12-28 00:17:50,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2021-12-28 00:17:50,505 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 302 transitions. [2021-12-28 00:17:50,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-28 00:17:50,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:17:50,506 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 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, 1, 1, 1, 1] [2021-12-28 00:17:50,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-28 00:17:50,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:50,721 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:17:50,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:17:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2021-12-28 00:17:50,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:17:50,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372606546] [2021-12-28 00:17:50,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:50,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:17:50,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:17:50,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480743023] [2021-12-28 00:17:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:17:50,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:17:50,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:17:50,736 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) [2021-12-28 00:17:50,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-28 00:17:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:17:50,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-28 00:17:50,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:17:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-28 00:17:52,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:17:55,239 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-28 00:17:55,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:17:55,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372606546] [2021-12-28 00:17:55,240 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:17:55,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480743023] [2021-12-28 00:17:55,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480743023] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:17:55,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:17:55,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 33 [2021-12-28 00:17:55,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696118605] [2021-12-28 00:17:55,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:17:55,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 00:17:55,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:17:55,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 00:17:55,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 00:17:55,241 INFO L87 Difference]: Start difference. First operand 216 states and 302 transitions. Second operand has 33 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 12 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-28 00:18:05,889 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 [] [2021-12-28 00:18:11,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:18:15,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:18:21,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:18:23,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:18:25,270 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:18:28,954 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:18:36,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:18:38,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:18:39,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:18:42,070 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-28 00:18:44,485 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 [] [2021-12-28 00:18:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:18:44,501 INFO L93 Difference]: Finished difference Result 415 states and 576 transitions. [2021-12-28 00:18:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-28 00:18:44,503 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 12 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) Word has length 87 [2021-12-28 00:18:44,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:18:44,512 INFO L225 Difference]: With dead ends: 415 [2021-12-28 00:18:44,516 INFO L226 Difference]: Without dead ends: 352 [2021-12-28 00:18:44,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 152 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3318 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=1744, Invalid=7958, Unknown=0, NotChecked=0, Total=9702 [2021-12-28 00:18:44,520 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 240 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 502 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:18:44,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 587 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [502 Valid, 1483 Invalid, 10 Unknown, 0 Unchecked, 29.0s Time] [2021-12-28 00:18:44,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-28 00:18:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 293. [2021-12-28 00:18:44,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 164 states have (on average 1.1890243902439024) internal successors, (195), 168 states have internal predecessors, (195), 109 states have call successors, (109), 19 states have call predecessors, (109), 19 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2021-12-28 00:18:44,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 412 transitions. [2021-12-28 00:18:44,691 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 412 transitions. Word has length 87 [2021-12-28 00:18:44,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:18:44,692 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 412 transitions. [2021-12-28 00:18:44,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 28 states have (on average 2.107142857142857) internal successors, (59), 28 states have internal predecessors, (59), 12 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2021-12-28 00:18:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 412 transitions. [2021-12-28 00:18:44,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-28 00:18:44,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:18:44,693 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-28 00:18:44,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-28 00:18:44,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-28 00:18:44,908 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:18:44,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:18:44,908 INFO L85 PathProgramCache]: Analyzing trace with hash 967586699, now seen corresponding path program 2 times [2021-12-28 00:18:44,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:18:44,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525938588] [2021-12-28 00:18:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:18:44,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:18:44,933 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:18:44,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890967170] [2021-12-28 00:18:44,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 00:18:44,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:18:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:18:44,942 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) [2021-12-28 00:18:44,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-28 00:18:45,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 00:18:45,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:18:45,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-28 00:18:45,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:18:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-28 00:18:45,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:18:45,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:18:45,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525938588] [2021-12-28 00:18:45,139 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:18:45,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890967170] [2021-12-28 00:18:45,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890967170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:18:45,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:18:45,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 00:18:45,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312457820] [2021-12-28 00:18:45,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:18:45,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 00:18:45,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:18:45,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 00:18:45,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 00:18:45,141 INFO L87 Difference]: Start difference. First operand 293 states and 412 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 00:18:45,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:18:45,246 INFO L93 Difference]: Finished difference Result 439 states and 618 transitions. [2021-12-28 00:18:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 00:18:45,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 88 [2021-12-28 00:18:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:18:45,247 INFO L225 Difference]: With dead ends: 439 [2021-12-28 00:18:45,247 INFO L226 Difference]: Without dead ends: 285 [2021-12-28 00:18:45,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:18:45,249 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:18:45,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 103 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:18:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-28 00:18:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 277. [2021-12-28 00:18:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 157 states have (on average 1.178343949044586) internal successors, (185), 158 states have internal predecessors, (185), 101 states have call successors, (101), 18 states have call predecessors, (101), 18 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-28 00:18:45,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 386 transitions. [2021-12-28 00:18:45,325 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 386 transitions. Word has length 88 [2021-12-28 00:18:45,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:18:45,325 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 386 transitions. [2021-12-28 00:18:45,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 00:18:45,325 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 386 transitions. [2021-12-28 00:18:45,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 00:18:45,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:18:45,326 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:18:45,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-28 00:18:45,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-28 00:18:45,543 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:18:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:18:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash -275231594, now seen corresponding path program 1 times [2021-12-28 00:18:45,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:18:45,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332591040] [2021-12-28 00:18:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:18:45,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:18:45,549 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:18:45,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186106895] [2021-12-28 00:18:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:18:45,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:18:45,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:18:45,556 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) [2021-12-28 00:18:45,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-28 00:18:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:18:45,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 00:18:45,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:18:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 90 proven. 15 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-28 00:18:45,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:18:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-12-28 00:18:46,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:18:46,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332591040] [2021-12-28 00:18:46,078 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:18:46,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186106895] [2021-12-28 00:18:46,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186106895] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:18:46,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:18:46,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-12-28 00:18:46,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308396625] [2021-12-28 00:18:46,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:18:46,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-28 00:18:46,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:18:46,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-28 00:18:46,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-12-28 00:18:46,080 INFO L87 Difference]: Start difference. First operand 277 states and 386 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-12-28 00:18:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:18:46,360 INFO L93 Difference]: Finished difference Result 382 states and 527 transitions. [2021-12-28 00:18:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 00:18:46,361 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) Word has length 90 [2021-12-28 00:18:46,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:18:46,362 INFO L225 Difference]: With dead ends: 382 [2021-12-28 00:18:46,362 INFO L226 Difference]: Without dead ends: 244 [2021-12-28 00:18:46,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=694, Unknown=0, NotChecked=0, Total=870 [2021-12-28 00:18:46,364 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 67 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:18:46,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 384 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:18:46,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-12-28 00:18:46,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 238. [2021-12-28 00:18:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 134 states have (on average 1.1492537313432836) internal successors, (154), 135 states have internal predecessors, (154), 85 states have call successors, (85), 18 states have call predecessors, (85), 18 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-28 00:18:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 323 transitions. [2021-12-28 00:18:46,433 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 323 transitions. Word has length 90 [2021-12-28 00:18:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:18:46,434 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 323 transitions. [2021-12-28 00:18:46,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 states have internal predecessors, (44), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (28), 7 states have call predecessors, (28), 8 states have call successors, (28) [2021-12-28 00:18:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 323 transitions. [2021-12-28 00:18:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 00:18:46,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:18:46,439 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:18:46,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-28 00:18:46,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-28 00:18:46,656 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:18:46,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:18:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash 453133023, now seen corresponding path program 2 times [2021-12-28 00:18:46,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:18:46,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825049515] [2021-12-28 00:18:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:18:46,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:18:46,664 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:18:46,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391252811] [2021-12-28 00:18:46,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 00:18:46,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:18:46,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:18:46,671 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) [2021-12-28 00:18:46,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-28 00:18:46,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 00:18:46,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:18:46,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-28 00:18:46,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:18:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 46 proven. 30 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-12-28 00:18:47,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:18:48,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:18:48,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825049515] [2021-12-28 00:18:48,220 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:18:48,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391252811] [2021-12-28 00:18:48,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391252811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:18:48,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:18:48,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-12-28 00:18:48,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219170210] [2021-12-28 00:18:48,220 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 00:18:48,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 00:18:48,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:18:48,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 00:18:48,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-28 00:18:48,221 INFO L87 Difference]: Start difference. First operand 238 states and 323 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-28 00:18:48,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:18:48,717 INFO L93 Difference]: Finished difference Result 386 states and 546 transitions. [2021-12-28 00:18:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 00:18:48,718 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 112 [2021-12-28 00:18:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:18:48,719 INFO L225 Difference]: With dead ends: 386 [2021-12-28 00:18:48,719 INFO L226 Difference]: Without dead ends: 298 [2021-12-28 00:18:48,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2021-12-28 00:18:48,720 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 51 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 00:18:48,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 451 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 00:18:48,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-28 00:18:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 238. [2021-12-28 00:18:48,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 139 states have internal predecessors, (157), 81 states have call successors, (81), 18 states have call predecessors, (81), 18 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-28 00:18:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 318 transitions. [2021-12-28 00:18:48,789 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 318 transitions. Word has length 112 [2021-12-28 00:18:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:18:48,790 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 318 transitions. [2021-12-28 00:18:48,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-28 00:18:48,790 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 318 transitions. [2021-12-28 00:18:48,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-28 00:18:48,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:18:48,791 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:18:48,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-28 00:18:49,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:18:49,008 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:18:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:18:49,008 INFO L85 PathProgramCache]: Analyzing trace with hash 387872868, now seen corresponding path program 3 times [2021-12-28 00:18:49,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:18:49,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341095468] [2021-12-28 00:18:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:18:49,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:18:49,022 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:18:49,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603669817] [2021-12-28 00:18:49,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 00:18:49,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:18:49,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:18:49,040 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) [2021-12-28 00:18:49,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-28 00:18:49,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-28 00:18:49,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:18:49,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-28 00:18:49,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:18:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2021-12-28 00:18:49,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:18:49,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:18:49,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341095468] [2021-12-28 00:18:49,440 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:18:49,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603669817] [2021-12-28 00:18:49,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603669817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 00:18:49,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:18:49,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-28 00:18:49,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739385837] [2021-12-28 00:18:49,441 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-28 00:18:49,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 00:18:49,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:18:49,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 00:18:49,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 00:18:49,441 INFO L87 Difference]: Start difference. First operand 238 states and 318 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 00:18:49,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:18:49,620 INFO L93 Difference]: Finished difference Result 320 states and 435 transitions. [2021-12-28 00:18:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 00:18:49,620 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2021-12-28 00:18:49,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:18:49,622 INFO L225 Difference]: With dead ends: 320 [2021-12-28 00:18:49,622 INFO L226 Difference]: Without dead ends: 318 [2021-12-28 00:18:49,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-28 00:18:49,622 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 23 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 00:18:49,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 295 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 00:18:49,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-12-28 00:18:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 258. [2021-12-28 00:18:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 156 states have (on average 1.1282051282051282) internal successors, (176), 158 states have internal predecessors, (176), 82 states have call successors, (82), 19 states have call predecessors, (82), 19 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2021-12-28 00:18:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 339 transitions. [2021-12-28 00:18:49,690 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 339 transitions. Word has length 115 [2021-12-28 00:18:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:18:49,690 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 339 transitions. [2021-12-28 00:18:49,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-28 00:18:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 339 transitions. [2021-12-28 00:18:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-28 00:18:49,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:18:49,691 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:18:49,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-28 00:18:49,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:18:49,905 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:18:49,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:18:49,919 INFO L85 PathProgramCache]: Analyzing trace with hash 965525295, now seen corresponding path program 4 times [2021-12-28 00:18:49,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:18:49,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679082875] [2021-12-28 00:18:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:18:49,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:18:49,928 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:18:49,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146009207] [2021-12-28 00:18:49,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 00:18:49,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:18:49,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:18:49,936 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:18:50,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-28 00:18:50,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 00:18:50,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 00:18:50,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 00:18:50,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:18:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 139 proven. 28 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-12-28 00:18:50,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:18:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-28 00:18:50,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:18:50,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679082875] [2021-12-28 00:18:50,636 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-28 00:18:50,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146009207] [2021-12-28 00:18:50,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146009207] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 00:18:50,636 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-28 00:18:50,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 21 [2021-12-28 00:18:50,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846716484] [2021-12-28 00:18:50,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-28 00:18:50,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-28 00:18:50,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:18:50,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-28 00:18:50,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-12-28 00:18:50,637 INFO L87 Difference]: Start difference. First operand 258 states and 339 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 10 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2021-12-28 00:18:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:18:51,019 INFO L93 Difference]: Finished difference Result 315 states and 404 transitions. [2021-12-28 00:18:51,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 00:18:51,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 10 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 117 [2021-12-28 00:18:51,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:18:51,026 INFO L225 Difference]: With dead ends: 315 [2021-12-28 00:18:51,026 INFO L226 Difference]: Without dead ends: 114 [2021-12-28 00:18:51,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=869, Unknown=0, NotChecked=0, Total=1122 [2021-12-28 00:18:51,035 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 58 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 00:18:51,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 490 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 00:18:51,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-28 00:18:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2021-12-28 00:18:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 36 states have call successors, (36), 10 states have call predecessors, (36), 10 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-28 00:18:51,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 138 transitions. [2021-12-28 00:18:51,089 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 138 transitions. Word has length 117 [2021-12-28 00:18:51,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:18:51,090 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 138 transitions. [2021-12-28 00:18:51,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 10 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2021-12-28 00:18:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 138 transitions. [2021-12-28 00:18:51,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-28 00:18:51,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:18:51,107 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:18:51,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0