./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/egcd2-ll_unwindbound10.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 c22a2bf16e566e2dd78495f603a40c3d184b5b55 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 05:54:52,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 05:54:52,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 05:54:52,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 05:54:52,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 05:54:52,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 05:54:52,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 05:54:52,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 05:54:52,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 05:54:52,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 05:54:52,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 05:54:52,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 05:54:52,444 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 05:54:52,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 05:54:52,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 05:54:52,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 05:54:52,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 05:54:52,451 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 05:54:52,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 05:54:52,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 05:54:52,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 05:54:52,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 05:54:52,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 05:54:52,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 05:54:52,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 05:54:52,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 05:54:52,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 05:54:52,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 05:54:52,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 05:54:52,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 05:54:52,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 05:54:52,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 05:54:52,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 05:54:52,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 05:54:52,474 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 05:54:52,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 05:54:52,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 05:54:52,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 05:54:52,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 05:54:52,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 05:54:52,477 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 05:54:52,479 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 05:54:52,499 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 05:54:52,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 05:54:52,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 05:54:52,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 05:54:52,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 05:54:52,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 05:54:52,501 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 05:54:52,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 05:54:52,501 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 05:54:52,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 05:54:52,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 05:54:52,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 05:54:52,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 05:54:52,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 05:54:52,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 05:54:52,503 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 05:54:52,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 05:54:52,503 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 05:54:52,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 05:54:52,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 05:54:52,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 05:54:52,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 05:54:52,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 05:54:52,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 05:54:52,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 05:54:52,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 05:54:52,508 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 05:54:52,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 05:54:52,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 05:54:52,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 05:54:52,509 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c22a2bf16e566e2dd78495f603a40c3d184b5b55 [2021-08-26 05:54:52,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 05:54:52,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 05:54:52,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 05:54:52,779 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 05:54:52,780 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 05:54:52,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2021-08-26 05:54:52,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba030cda3/f14702b329264d4db8be4d8d21f56884/FLAGed2f98e00 [2021-08-26 05:54:53,201 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 05:54:53,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2021-08-26 05:54:53,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba030cda3/f14702b329264d4db8be4d8d21f56884/FLAGed2f98e00 [2021-08-26 05:54:53,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba030cda3/f14702b329264d4db8be4d8d21f56884 [2021-08-26 05:54:53,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 05:54:53,222 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 05:54:53,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 05:54:53,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 05:54:53,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 05:54:53,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:54:53" (1/1) ... [2021-08-26 05:54:53,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c133743 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:53, skipping insertion in model container [2021-08-26 05:54:53,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:54:53" (1/1) ... [2021-08-26 05:54:53,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 05:54:53,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 05:54:53,366 WARN L228 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/egcd2-ll_unwindbound10.c[490,503] [2021-08-26 05:54:53,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 05:54:53,402 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 05:54:53,415 WARN L228 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/egcd2-ll_unwindbound10.c[490,503] [2021-08-26 05:54:53,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 05:54:53,450 INFO L208 MainTranslator]: Completed translation [2021-08-26 05:54:53,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:53 WrapperNode [2021-08-26 05:54:53,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 05:54:53,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 05:54:53,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 05:54:53,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 05:54:53,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:53" (1/1) ... [2021-08-26 05:54:53,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:53" (1/1) ... [2021-08-26 05:54:53,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 05:54:53,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 05:54:53,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 05:54:53,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 05:54:53,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:53" (1/1) ... [2021-08-26 05:54:53,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:53" (1/1) ... [2021-08-26 05:54:53,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:53" (1/1) ... [2021-08-26 05:54:53,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:53" (1/1) ... [2021-08-26 05:54:53,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:53" (1/1) ... [2021-08-26 05:54:53,520 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:53" (1/1) ... [2021-08-26 05:54:53,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:53" (1/1) ... [2021-08-26 05:54:53,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 05:54:53,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 05:54:53,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 05:54:53,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 05:54:53,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:53" (1/1) ... [2021-08-26 05:54:53,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 05:54:53,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:54:53,554 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) [2021-08-26 05:54:53,576 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 [2021-08-26 05:54:53,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 05:54:53,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 05:54:53,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 05:54:53,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 05:54:53,893 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 05:54:53,899 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-08-26 05:54:53,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:54:53 BoogieIcfgContainer [2021-08-26 05:54:53,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 05:54:53,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 05:54:53,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 05:54:53,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 05:54:53,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:54:53" (1/3) ... [2021-08-26 05:54:53,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15382b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:54:53, skipping insertion in model container [2021-08-26 05:54:53,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:53" (2/3) ... [2021-08-26 05:54:53,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15382b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:54:53, skipping insertion in model container [2021-08-26 05:54:53,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:54:53" (3/3) ... [2021-08-26 05:54:53,909 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound10.c [2021-08-26 05:54:53,913 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 05:54:53,913 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-08-26 05:54:53,940 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 05:54:53,944 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-26 05:54:53,944 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-26 05:54:53,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:53,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 05:54:53,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:54:53,967 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:54:53,968 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:54:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:54:53,974 INFO L82 PathProgramCache]: Analyzing trace with hash -141782897, now seen corresponding path program 1 times [2021-08-26 05:54:53,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:54:53,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088558775] [2021-08-26 05:54:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:53,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:54:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:54:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:54:54,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:54:54,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088558775] [2021-08-26 05:54:54,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088558775] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:54:54,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:54:54,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 05:54:54,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101055500] [2021-08-26 05:54:54,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 05:54:54,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:54:54,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 05:54:54,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 05:54:54,139 INFO L87 Difference]: Start difference. First operand has 43 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 42 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:54,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:54:54,155 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2021-08-26 05:54:54,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 05:54:54,156 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-08-26 05:54:54,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:54:54,161 INFO L225 Difference]: With dead ends: 83 [2021-08-26 05:54:54,161 INFO L226 Difference]: Without dead ends: 39 [2021-08-26 05:54:54,163 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 05:54:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-26 05:54:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-26 05:54:54,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-08-26 05:54:54,188 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 13 [2021-08-26 05:54:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:54:54,188 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-08-26 05:54:54,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:54,189 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-08-26 05:54:54,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 05:54:54,189 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:54:54,189 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:54:54,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 05:54:54,190 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:54:54,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:54:54,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1057770534, now seen corresponding path program 1 times [2021-08-26 05:54:54,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:54:54,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056401415] [2021-08-26 05:54:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:54,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:54:54,234 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:54:54,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408514930] [2021-08-26 05:54:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:54,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:54:54,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:54:54,245 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) [2021-08-26 05:54:54,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 05:54:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:54:54,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 05:54:54,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:54:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:54:54,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:54:54,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056401415] [2021-08-26 05:54:54,435 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:54:54,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408514930] [2021-08-26 05:54:54,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408514930] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:54:54,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:54:54,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 05:54:54,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751795815] [2021-08-26 05:54:54,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 05:54:54,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:54:54,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 05:54:54,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:54:54,438 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:54,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:54:54,461 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-08-26 05:54:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 05:54:54,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-26 05:54:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:54:54,464 INFO L225 Difference]: With dead ends: 49 [2021-08-26 05:54:54,465 INFO L226 Difference]: Without dead ends: 41 [2021-08-26 05:54:54,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:54:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-26 05:54:54,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-08-26 05:54:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-08-26 05:54:54,474 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 14 [2021-08-26 05:54:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:54:54,474 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-08-26 05:54:54,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:54,475 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-08-26 05:54:54,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 05:54:54,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:54:54,476 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:54:54,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 05:54:54,692 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 [2021-08-26 05:54:54,693 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:54:54,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:54:54,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1568670238, now seen corresponding path program 1 times [2021-08-26 05:54:54,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:54:54,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44966307] [2021-08-26 05:54:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:54,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:54:54,711 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:54:54,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282632395] [2021-08-26 05:54:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:54,712 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:54:54,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:54:54,713 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) [2021-08-26 05:54:54,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 05:54:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:54:54,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:54:54,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:54:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:54:54,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:54:54,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44966307] [2021-08-26 05:54:54,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:54:54,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282632395] [2021-08-26 05:54:54,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282632395] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:54:54,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:54:54,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 05:54:54,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863662793] [2021-08-26 05:54:54,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:54:54,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:54:54,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:54:54,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:54:54,933 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:54:55,018 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-08-26 05:54:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:54:55,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 05:54:55,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:54:55,019 INFO L225 Difference]: With dead ends: 69 [2021-08-26 05:54:55,019 INFO L226 Difference]: Without dead ends: 61 [2021-08-26 05:54:55,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:54:55,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-26 05:54:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2021-08-26 05:54:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.25) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-08-26 05:54:55,023 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 15 [2021-08-26 05:54:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:54:55,023 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-08-26 05:54:55,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:55,024 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-08-26 05:54:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 05:54:55,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:54:55,025 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:54:55,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 05:54:55,235 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 [2021-08-26 05:54:55,235 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:54:55,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:54:55,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1384108475, now seen corresponding path program 1 times [2021-08-26 05:54:55,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:54:55,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780743289] [2021-08-26 05:54:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:55,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:54:55,243 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:54:55,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590096201] [2021-08-26 05:54:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:55,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:54:55,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:54:55,244 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) [2021-08-26 05:54:55,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 05:54:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:54:55,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 05:54:55,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:54:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:54:55,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:54:55,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780743289] [2021-08-26 05:54:55,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:54:55,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590096201] [2021-08-26 05:54:55,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590096201] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:54:55,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:54:55,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 05:54:55,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190518252] [2021-08-26 05:54:55,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:54:55,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:54:55,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:54:55,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:54:55,485 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:54:55,628 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-08-26 05:54:55,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 05:54:55,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 05:54:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:54:55,629 INFO L225 Difference]: With dead ends: 80 [2021-08-26 05:54:55,629 INFO L226 Difference]: Without dead ends: 78 [2021-08-26 05:54:55,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:54:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-26 05:54:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 45. [2021-08-26 05:54:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-08-26 05:54:55,633 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2021-08-26 05:54:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:54:55,633 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-08-26 05:54:55,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-08-26 05:54:55,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 05:54:55,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:54:55,634 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:54:55,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 05:54:55,848 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 [2021-08-26 05:54:55,849 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:54:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:54:55,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1311460386, now seen corresponding path program 1 times [2021-08-26 05:54:55,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:54:55,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899793404] [2021-08-26 05:54:55,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:55,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:54:55,857 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:54:55,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809240927] [2021-08-26 05:54:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:55,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:54:55,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:54:55,858 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) [2021-08-26 05:54:55,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 05:54:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:54:55,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 05:54:55,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:54:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:54:56,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:54:56,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899793404] [2021-08-26 05:54:56,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:54:56,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809240927] [2021-08-26 05:54:56,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809240927] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:54:56,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:54:56,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 05:54:56,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766468605] [2021-08-26 05:54:56,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 05:54:56,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:54:56,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 05:54:56,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 05:54:56,098 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:54:56,145 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-08-26 05:54:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 05:54:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 05:54:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:54:56,146 INFO L225 Difference]: With dead ends: 64 [2021-08-26 05:54:56,146 INFO L226 Difference]: Without dead ends: 62 [2021-08-26 05:54:56,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:54:56,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-26 05:54:56,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-08-26 05:54:56,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:56,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-08-26 05:54:56,150 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 18 [2021-08-26 05:54:56,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:54:56,150 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-08-26 05:54:56,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:56,150 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-08-26 05:54:56,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 05:54:56,151 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:54:56,151 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:54:56,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 05:54:56,356 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 [2021-08-26 05:54:56,357 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:54:56,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:54:56,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1862118746, now seen corresponding path program 1 times [2021-08-26 05:54:56,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:54:56,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616759952] [2021-08-26 05:54:56,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:56,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:54:56,368 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:54:56,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957084174] [2021-08-26 05:54:56,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:56,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:54:56,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:54:56,369 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) [2021-08-26 05:54:56,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 05:54:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:54:56,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 05:54:56,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:54:56,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:54:56,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:54:56,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616759952] [2021-08-26 05:54:56,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:54:56,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957084174] [2021-08-26 05:54:56,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957084174] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:54:56,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:54:56,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 05:54:56,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824715678] [2021-08-26 05:54:56,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:54:56,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:54:56,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:54:56,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:54:56,521 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:56,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:54:56,542 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2021-08-26 05:54:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 05:54:56,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-26 05:54:56,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:54:56,544 INFO L225 Difference]: With dead ends: 85 [2021-08-26 05:54:56,544 INFO L226 Difference]: Without dead ends: 55 [2021-08-26 05:54:56,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:54:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-26 05:54:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-08-26 05:54:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-08-26 05:54:56,554 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 20 [2021-08-26 05:54:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:54:56,554 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-08-26 05:54:56,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:56,554 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-08-26 05:54:56,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 05:54:56,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:54:56,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:54:56,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 05:54:56,755 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 [2021-08-26 05:54:56,755 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:54:56,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:54:56,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1887855967, now seen corresponding path program 1 times [2021-08-26 05:54:56,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:54:56,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570547007] [2021-08-26 05:54:56,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:56,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:54:56,762 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:54:56,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624226035] [2021-08-26 05:54:56,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:56,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:54:56,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:54:56,767 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) [2021-08-26 05:54:56,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 05:54:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:54:56,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 05:54:56,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:54:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:54:57,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:54:57,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570547007] [2021-08-26 05:54:57,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:54:57,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624226035] [2021-08-26 05:54:57,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624226035] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:54:57,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:54:57,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 05:54:57,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415119414] [2021-08-26 05:54:57,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:54:57,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:54:57,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:54:57,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:54:57,082 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:54:57,171 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-08-26 05:54:57,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:54:57,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-26 05:54:57,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:54:57,175 INFO L225 Difference]: With dead ends: 62 [2021-08-26 05:54:57,175 INFO L226 Difference]: Without dead ends: 60 [2021-08-26 05:54:57,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:54:57,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-26 05:54:57,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-08-26 05:54:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-08-26 05:54:57,188 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2021-08-26 05:54:57,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:54:57,190 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-08-26 05:54:57,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:57,191 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-08-26 05:54:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 05:54:57,192 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:54:57,193 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:54:57,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 05:54:57,404 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 [2021-08-26 05:54:57,405 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:54:57,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:54:57,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1753227772, now seen corresponding path program 1 times [2021-08-26 05:54:57,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:54:57,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2718753] [2021-08-26 05:54:57,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:57,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:54:57,413 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:54:57,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541945389] [2021-08-26 05:54:57,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:57,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:54:57,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:54:57,414 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) [2021-08-26 05:54:57,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 05:54:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:54:57,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 05:54:57,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:54:57,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:54:57,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:54:57,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2718753] [2021-08-26 05:54:57,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:54:57,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541945389] [2021-08-26 05:54:57,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541945389] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:54:57,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:54:57,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 05:54:57,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564277481] [2021-08-26 05:54:57,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:54:57,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:54:57,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:54:57,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:54:57,775 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:54:57,818 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-08-26 05:54:57,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 05:54:57,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-26 05:54:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:54:57,819 INFO L225 Difference]: With dead ends: 67 [2021-08-26 05:54:57,819 INFO L226 Difference]: Without dead ends: 65 [2021-08-26 05:54:57,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:54:57,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-26 05:54:57,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2021-08-26 05:54:57,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:57,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-08-26 05:54:57,822 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2021-08-26 05:54:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:54:57,822 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-08-26 05:54:57,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-08-26 05:54:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 05:54:57,823 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:54:57,823 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:54:57,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 05:54:58,032 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 [2021-08-26 05:54:58,033 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:54:58,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:54:58,033 INFO L82 PathProgramCache]: Analyzing trace with hash 29719088, now seen corresponding path program 1 times [2021-08-26 05:54:58,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:54:58,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30500890] [2021-08-26 05:54:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:58,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:54:58,040 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:54:58,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949254468] [2021-08-26 05:54:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:58,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:54:58,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:54:58,041 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) [2021-08-26 05:54:58,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 05:54:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:54:58,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 05:54:58,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:54:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:54:58,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:54:58,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30500890] [2021-08-26 05:54:58,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:54:58,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949254468] [2021-08-26 05:54:58,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949254468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:54:58,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:54:58,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 05:54:58,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073735755] [2021-08-26 05:54:58,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:54:58,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:54:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:54:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:54:58,284 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:54:58,354 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2021-08-26 05:54:58,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:54:58,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-26 05:54:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:54:58,355 INFO L225 Difference]: With dead ends: 108 [2021-08-26 05:54:58,355 INFO L226 Difference]: Without dead ends: 106 [2021-08-26 05:54:58,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:54:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-26 05:54:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-08-26 05:54:58,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 77 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:58,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2021-08-26 05:54:58,361 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 26 [2021-08-26 05:54:58,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:54:58,361 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2021-08-26 05:54:58,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:58,361 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2021-08-26 05:54:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 05:54:58,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:54:58,362 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-26 05:54:58,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 05:54:58,577 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 [2021-08-26 05:54:58,578 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:54:58,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:54:58,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1666886870, now seen corresponding path program 1 times [2021-08-26 05:54:58,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:54:58,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927091381] [2021-08-26 05:54:58,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:58,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:54:58,586 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:54:58,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545041883] [2021-08-26 05:54:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:58,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:54:58,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:54:58,587 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) [2021-08-26 05:54:58,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 05:54:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:54:58,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:54:58,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:54:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:54:58,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:54:58,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927091381] [2021-08-26 05:54:58,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:54:58,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545041883] [2021-08-26 05:54:58,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545041883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:54:58,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:54:58,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 05:54:58,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367263830] [2021-08-26 05:54:58,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:54:58,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:54:58,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:54:58,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:54:58,824 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:54:58,844 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2021-08-26 05:54:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:54:58,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-26 05:54:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:54:58,845 INFO L225 Difference]: With dead ends: 89 [2021-08-26 05:54:58,845 INFO L226 Difference]: Without dead ends: 81 [2021-08-26 05:54:58,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:54:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-26 05:54:58,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-08-26 05:54:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 80 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:58,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2021-08-26 05:54:58,857 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 28 [2021-08-26 05:54:58,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:54:58,857 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2021-08-26 05:54:58,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:58,857 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2021-08-26 05:54:58,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 05:54:58,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:54:58,861 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-26 05:54:58,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 05:54:59,077 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 [2021-08-26 05:54:59,078 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:54:59,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:54:59,078 INFO L82 PathProgramCache]: Analyzing trace with hash -134066994, now seen corresponding path program 1 times [2021-08-26 05:54:59,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:54:59,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075759961] [2021-08-26 05:54:59,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:59,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:54:59,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:54:59,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731234742] [2021-08-26 05:54:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:59,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:54:59,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:54:59,086 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) [2021-08-26 05:54:59,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 05:54:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:54:59,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 05:54:59,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:54:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:54:59,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:54:59,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075759961] [2021-08-26 05:54:59,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:54:59,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731234742] [2021-08-26 05:54:59,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731234742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:54:59,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:54:59,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:54:59,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986023360] [2021-08-26 05:54:59,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:54:59,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:54:59,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:54:59,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:54:59,334 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:59,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:54:59,461 INFO L93 Difference]: Finished difference Result 232 states and 266 transitions. [2021-08-26 05:54:59,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 05:54:59,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-26 05:54:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:54:59,463 INFO L225 Difference]: With dead ends: 232 [2021-08-26 05:54:59,463 INFO L226 Difference]: Without dead ends: 224 [2021-08-26 05:54:59,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-26 05:54:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-26 05:54:59,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 136. [2021-08-26 05:54:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.353846153846154) internal successors, (176), 135 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:59,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 176 transitions. [2021-08-26 05:54:59,470 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 176 transitions. Word has length 29 [2021-08-26 05:54:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:54:59,471 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 176 transitions. [2021-08-26 05:54:59,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 176 transitions. [2021-08-26 05:54:59,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 05:54:59,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:54:59,471 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-26 05:54:59,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 05:54:59,684 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 [2021-08-26 05:54:59,685 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:54:59,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:54:59,685 INFO L82 PathProgramCache]: Analyzing trace with hash 966792015, now seen corresponding path program 1 times [2021-08-26 05:54:59,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:54:59,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943281238] [2021-08-26 05:54:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:59,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:54:59,691 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:54:59,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215486536] [2021-08-26 05:54:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:54:59,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:54:59,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:54:59,701 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) [2021-08-26 05:54:59,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 05:54:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:54:59,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:54:59,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:54:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:54:59,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:54:59,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943281238] [2021-08-26 05:54:59,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:54:59,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215486536] [2021-08-26 05:54:59,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215486536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:54:59,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:54:59,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 05:54:59,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419145031] [2021-08-26 05:54:59,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:54:59,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:54:59,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:54:59,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:54:59,968 INFO L87 Difference]: Start difference. First operand 136 states and 176 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:59,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:54:59,989 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2021-08-26 05:54:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 05:54:59,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-26 05:54:59,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:54:59,990 INFO L225 Difference]: With dead ends: 179 [2021-08-26 05:54:59,990 INFO L226 Difference]: Without dead ends: 136 [2021-08-26 05:54:59,991 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:54:59,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-26 05:54:59,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-08-26 05:54:59,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.3461538461538463) internal successors, (175), 135 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2021-08-26 05:54:59,997 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 30 [2021-08-26 05:54:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:54:59,997 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 175 transitions. [2021-08-26 05:54:59,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:54:59,997 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 175 transitions. [2021-08-26 05:54:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 05:54:59,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:54:59,998 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:55:00,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:00,201 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 [2021-08-26 05:55:00,201 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:00,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:00,202 INFO L82 PathProgramCache]: Analyzing trace with hash 302394158, now seen corresponding path program 1 times [2021-08-26 05:55:00,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:00,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12753478] [2021-08-26 05:55:00,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:00,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:00,207 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:00,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23225781] [2021-08-26 05:55:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:00,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:00,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:00,209 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) [2021-08-26 05:55:00,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 05:55:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:55:00,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 05:55:00,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:55:00,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:00,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12753478] [2021-08-26 05:55:00,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:00,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23225781] [2021-08-26 05:55:00,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23225781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:00,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:00,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:55:00,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498158811] [2021-08-26 05:55:00,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:55:00,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:55:00,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:55:00,660 INFO L87 Difference]: Start difference. First operand 136 states and 175 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:00,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:00,821 INFO L93 Difference]: Finished difference Result 173 states and 219 transitions. [2021-08-26 05:55:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 05:55:00,821 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-26 05:55:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:00,822 INFO L225 Difference]: With dead ends: 173 [2021-08-26 05:55:00,822 INFO L226 Difference]: Without dead ends: 171 [2021-08-26 05:55:00,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:55:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-26 05:55:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2021-08-26 05:55:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.3571428571428572) internal successors, (209), 159 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 209 transitions. [2021-08-26 05:55:00,830 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 209 transitions. Word has length 32 [2021-08-26 05:55:00,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:00,831 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 209 transitions. [2021-08-26 05:55:00,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:00,831 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 209 transitions. [2021-08-26 05:55:00,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 05:55:00,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:00,832 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-26 05:55:00,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:01,045 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 [2021-08-26 05:55:01,045 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:01,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:01,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2001825622, now seen corresponding path program 1 times [2021-08-26 05:55:01,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:01,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244917421] [2021-08-26 05:55:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:01,046 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:01,051 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:01,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369111057] [2021-08-26 05:55:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:01,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:01,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:01,052 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) [2021-08-26 05:55:01,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 05:55:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:55:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 05:55:01,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:55:01,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:01,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244917421] [2021-08-26 05:55:01,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:01,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369111057] [2021-08-26 05:55:01,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369111057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:01,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:01,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:55:01,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761149504] [2021-08-26 05:55:01,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:55:01,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:55:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:55:01,342 INFO L87 Difference]: Start difference. First operand 160 states and 209 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:01,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:01,373 INFO L93 Difference]: Finished difference Result 269 states and 355 transitions. [2021-08-26 05:55:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 05:55:01,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-26 05:55:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:01,374 INFO L225 Difference]: With dead ends: 269 [2021-08-26 05:55:01,374 INFO L226 Difference]: Without dead ends: 171 [2021-08-26 05:55:01,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:55:01,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-08-26 05:55:01,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2021-08-26 05:55:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.3374233128834356) internal successors, (218), 168 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 218 transitions. [2021-08-26 05:55:01,382 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 218 transitions. Word has length 34 [2021-08-26 05:55:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:01,383 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 218 transitions. [2021-08-26 05:55:01,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 218 transitions. [2021-08-26 05:55:01,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 05:55:01,383 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:01,383 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:55:01,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:01,596 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 [2021-08-26 05:55:01,597 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:01,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:01,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1456833039, now seen corresponding path program 1 times [2021-08-26 05:55:01,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:01,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573740245] [2021-08-26 05:55:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:01,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:01,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:01,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714496060] [2021-08-26 05:55:01,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:01,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:01,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:01,606 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) [2021-08-26 05:55:01,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 05:55:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:55:01,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 05:55:01,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:55:02,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:02,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573740245] [2021-08-26 05:55:02,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:02,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714496060] [2021-08-26 05:55:02,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714496060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:02,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:02,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 05:55:02,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853507533] [2021-08-26 05:55:02,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 05:55:02,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:02,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 05:55:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:55:02,526 INFO L87 Difference]: Start difference. First operand 169 states and 218 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:02,739 INFO L93 Difference]: Finished difference Result 180 states and 225 transitions. [2021-08-26 05:55:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 05:55:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-26 05:55:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:02,741 INFO L225 Difference]: With dead ends: 180 [2021-08-26 05:55:02,741 INFO L226 Difference]: Without dead ends: 178 [2021-08-26 05:55:02,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-26 05:55:02,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-26 05:55:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 169. [2021-08-26 05:55:02,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.3251533742331287) internal successors, (216), 168 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 216 transitions. [2021-08-26 05:55:02,751 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 216 transitions. Word has length 34 [2021-08-26 05:55:02,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:02,751 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 216 transitions. [2021-08-26 05:55:02,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:02,751 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 216 transitions. [2021-08-26 05:55:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 05:55:02,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:02,752 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-26 05:55:02,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:02,968 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 [2021-08-26 05:55:02,968 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:02,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:02,969 INFO L82 PathProgramCache]: Analyzing trace with hash 142945620, now seen corresponding path program 1 times [2021-08-26 05:55:02,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:02,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853589856] [2021-08-26 05:55:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:02,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:02,974 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:02,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508540038] [2021-08-26 05:55:02,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:02,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:02,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:02,981 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) [2021-08-26 05:55:02,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 05:55:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:55:03,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-26 05:55:03,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:55:04,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:04,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853589856] [2021-08-26 05:55:04,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:04,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508540038] [2021-08-26 05:55:04,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508540038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:04,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:04,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 05:55:04,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163325595] [2021-08-26 05:55:04,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 05:55:04,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:04,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 05:55:04,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-26 05:55:04,432 INFO L87 Difference]: Start difference. First operand 169 states and 216 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:04,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:04,974 INFO L93 Difference]: Finished difference Result 197 states and 248 transitions. [2021-08-26 05:55:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 05:55:04,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-26 05:55:04,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:04,975 INFO L225 Difference]: With dead ends: 197 [2021-08-26 05:55:04,975 INFO L226 Difference]: Without dead ends: 195 [2021-08-26 05:55:04,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 504.3ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-08-26 05:55:04,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-26 05:55:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 169. [2021-08-26 05:55:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 163 states have (on average 1.312883435582822) internal successors, (214), 168 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 214 transitions. [2021-08-26 05:55:04,984 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 214 transitions. Word has length 36 [2021-08-26 05:55:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:04,984 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 214 transitions. [2021-08-26 05:55:04,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:04,984 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 214 transitions. [2021-08-26 05:55:04,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 05:55:04,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:04,985 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:55:05,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:05,193 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 [2021-08-26 05:55:05,193 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:05,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1084150885, now seen corresponding path program 2 times [2021-08-26 05:55:05,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:05,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053417860] [2021-08-26 05:55:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:05,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:05,199 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:05,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030656705] [2021-08-26 05:55:05,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:55:05,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:05,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:05,205 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) [2021-08-26 05:55:05,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 05:55:05,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:55:05,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:55:05,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-26 05:55:05,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:55:05,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:05,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053417860] [2021-08-26 05:55:05,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:05,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030656705] [2021-08-26 05:55:05,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030656705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:05,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:05,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 05:55:05,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203659855] [2021-08-26 05:55:05,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 05:55:05,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:05,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 05:55:05,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:55:05,892 INFO L87 Difference]: Start difference. First operand 169 states and 214 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:06,087 INFO L93 Difference]: Finished difference Result 184 states and 229 transitions. [2021-08-26 05:55:06,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 05:55:06,101 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-26 05:55:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:06,102 INFO L225 Difference]: With dead ends: 184 [2021-08-26 05:55:06,102 INFO L226 Difference]: Without dead ends: 182 [2021-08-26 05:55:06,102 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-26 05:55:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-26 05:55:06,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 170. [2021-08-26 05:55:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 164 states have (on average 1.3109756097560976) internal successors, (215), 169 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:06,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 215 transitions. [2021-08-26 05:55:06,110 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 215 transitions. Word has length 36 [2021-08-26 05:55:06,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:06,110 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 215 transitions. [2021-08-26 05:55:06,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 215 transitions. [2021-08-26 05:55:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 05:55:06,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:06,110 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-26 05:55:06,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:06,320 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 [2021-08-26 05:55:06,321 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:06,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:06,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1970211809, now seen corresponding path program 1 times [2021-08-26 05:55:06,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:06,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492599115] [2021-08-26 05:55:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:06,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:06,327 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:06,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547052530] [2021-08-26 05:55:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:06,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:06,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:06,331 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) [2021-08-26 05:55:06,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 05:55:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:55:06,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 05:55:06,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:55:06,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:06,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492599115] [2021-08-26 05:55:06,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:06,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547052530] [2021-08-26 05:55:06,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547052530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:06,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:06,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-26 05:55:06,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316297806] [2021-08-26 05:55:06,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:55:06,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:06,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:55:06,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:55:06,860 INFO L87 Difference]: Start difference. First operand 170 states and 215 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:06,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:06,894 INFO L93 Difference]: Finished difference Result 181 states and 226 transitions. [2021-08-26 05:55:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 05:55:06,894 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-26 05:55:06,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:06,895 INFO L225 Difference]: With dead ends: 181 [2021-08-26 05:55:06,895 INFO L226 Difference]: Without dead ends: 173 [2021-08-26 05:55:06,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:55:06,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-08-26 05:55:06,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-08-26 05:55:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 167 states have (on average 1.3053892215568863) internal successors, (218), 172 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 218 transitions. [2021-08-26 05:55:06,904 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 218 transitions. Word has length 38 [2021-08-26 05:55:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:06,904 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 218 transitions. [2021-08-26 05:55:06,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 218 transitions. [2021-08-26 05:55:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-26 05:55:06,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:06,905 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-26 05:55:06,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:07,120 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 [2021-08-26 05:55:07,120 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash -947205511, now seen corresponding path program 1 times [2021-08-26 05:55:07,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:07,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435801077] [2021-08-26 05:55:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:07,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:07,126 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:07,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268736466] [2021-08-26 05:55:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:07,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:07,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:07,130 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) [2021-08-26 05:55:07,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 05:55:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:55:07,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-26 05:55:07,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:55:08,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:08,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435801077] [2021-08-26 05:55:08,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:08,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268736466] [2021-08-26 05:55:08,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268736466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:08,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:08,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 05:55:08,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402054233] [2021-08-26 05:55:08,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 05:55:08,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:08,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 05:55:08,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-26 05:55:08,342 INFO L87 Difference]: Start difference. First operand 173 states and 218 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:08,731 INFO L93 Difference]: Finished difference Result 217 states and 269 transitions. [2021-08-26 05:55:08,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 05:55:08,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-26 05:55:08,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:08,732 INFO L225 Difference]: With dead ends: 217 [2021-08-26 05:55:08,732 INFO L226 Difference]: Without dead ends: 213 [2021-08-26 05:55:08,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-26 05:55:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-08-26 05:55:08,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 199. [2021-08-26 05:55:08,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 193 states have (on average 1.3212435233160622) internal successors, (255), 198 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:08,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 255 transitions. [2021-08-26 05:55:08,741 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 255 transitions. Word has length 39 [2021-08-26 05:55:08,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:08,742 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 255 transitions. [2021-08-26 05:55:08,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:08,742 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 255 transitions. [2021-08-26 05:55:08,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-26 05:55:08,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:08,742 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-26 05:55:08,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:08,956 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 [2021-08-26 05:55:08,957 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:08,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:08,957 INFO L82 PathProgramCache]: Analyzing trace with hash 268729372, now seen corresponding path program 1 times [2021-08-26 05:55:08,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:08,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110000416] [2021-08-26 05:55:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:08,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:08,967 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:08,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083814825] [2021-08-26 05:55:08,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:08,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:08,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:08,969 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) [2021-08-26 05:55:08,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 05:55:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:55:09,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 05:55:09,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-26 05:55:09,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:09,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110000416] [2021-08-26 05:55:09,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:09,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083814825] [2021-08-26 05:55:09,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083814825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:09,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:09,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:55:09,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104019971] [2021-08-26 05:55:09,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:55:09,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:09,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:55:09,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:55:09,653 INFO L87 Difference]: Start difference. First operand 199 states and 255 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:09,767 INFO L93 Difference]: Finished difference Result 247 states and 311 transitions. [2021-08-26 05:55:09,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:55:09,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-26 05:55:09,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:09,769 INFO L225 Difference]: With dead ends: 247 [2021-08-26 05:55:09,769 INFO L226 Difference]: Without dead ends: 239 [2021-08-26 05:55:09,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:55:09,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-08-26 05:55:09,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 226. [2021-08-26 05:55:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.3227272727272728) internal successors, (291), 225 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 291 transitions. [2021-08-26 05:55:09,783 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 291 transitions. Word has length 41 [2021-08-26 05:55:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:09,783 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 291 transitions. [2021-08-26 05:55:09,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 291 transitions. [2021-08-26 05:55:09,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-26 05:55:09,784 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:09,784 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:55:09,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:10,000 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 [2021-08-26 05:55:10,001 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:10,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:10,001 INFO L82 PathProgramCache]: Analyzing trace with hash 170255994, now seen corresponding path program 2 times [2021-08-26 05:55:10,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:10,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913587875] [2021-08-26 05:55:10,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:10,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:10,009 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:10,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361424454] [2021-08-26 05:55:10,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:55:10,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:10,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:10,010 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) [2021-08-26 05:55:10,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 05:55:10,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:55:10,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:55:10,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 05:55:10,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:55:10,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:10,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913587875] [2021-08-26 05:55:10,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:10,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361424454] [2021-08-26 05:55:10,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361424454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:10,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:10,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:55:10,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607873881] [2021-08-26 05:55:10,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:55:10,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:10,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:55:10,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:55:10,635 INFO L87 Difference]: Start difference. First operand 226 states and 291 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:10,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:10,686 INFO L93 Difference]: Finished difference Result 250 states and 317 transitions. [2021-08-26 05:55:10,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 05:55:10,687 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-26 05:55:10,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:10,687 INFO L225 Difference]: With dead ends: 250 [2021-08-26 05:55:10,688 INFO L226 Difference]: Without dead ends: 240 [2021-08-26 05:55:10,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:55:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-08-26 05:55:10,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-08-26 05:55:10,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 233 states have (on average 1.3090128755364807) internal successors, (305), 238 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:10,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 305 transitions. [2021-08-26 05:55:10,698 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 305 transitions. Word has length 42 [2021-08-26 05:55:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:10,698 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 305 transitions. [2021-08-26 05:55:10,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 305 transitions. [2021-08-26 05:55:10,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-26 05:55:10,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:10,699 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-26 05:55:10,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:10,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-26 05:55:10,905 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:10,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:10,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1229525663, now seen corresponding path program 1 times [2021-08-26 05:55:10,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:10,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276139561] [2021-08-26 05:55:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:10,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:10,912 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:10,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841491766] [2021-08-26 05:55:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:10,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:10,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:10,913 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:55:10,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 05:55:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:55:11,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 05:55:11,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:55:11,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:11,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276139561] [2021-08-26 05:55:11,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:11,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841491766] [2021-08-26 05:55:11,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841491766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:11,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:11,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:55:11,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409745700] [2021-08-26 05:55:11,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:55:11,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:55:11,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:55:11,536 INFO L87 Difference]: Start difference. First operand 239 states and 305 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:11,586 INFO L93 Difference]: Finished difference Result 368 states and 482 transitions. [2021-08-26 05:55:11,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 05:55:11,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-26 05:55:11,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:11,588 INFO L225 Difference]: With dead ends: 368 [2021-08-26 05:55:11,588 INFO L226 Difference]: Without dead ends: 241 [2021-08-26 05:55:11,588 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 31.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:55:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-26 05:55:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2021-08-26 05:55:11,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 235 states have (on average 1.297872340425532) internal successors, (305), 240 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 305 transitions. [2021-08-26 05:55:11,598 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 305 transitions. Word has length 44 [2021-08-26 05:55:11,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:11,598 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 305 transitions. [2021-08-26 05:55:11,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:11,598 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 305 transitions. [2021-08-26 05:55:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 05:55:11,599 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:11,599 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:55:11,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:11,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-26 05:55:11,813 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:11,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:11,813 INFO L82 PathProgramCache]: Analyzing trace with hash -613640578, now seen corresponding path program 2 times [2021-08-26 05:55:11,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:11,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69939220] [2021-08-26 05:55:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:11,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:11,819 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:11,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [522292758] [2021-08-26 05:55:11,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:55:11,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:11,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:11,821 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:55:11,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 05:55:12,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:55:12,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:55:12,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 05:55:12,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:55:12,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:12,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69939220] [2021-08-26 05:55:12,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:12,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522292758] [2021-08-26 05:55:12,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522292758] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:55:12,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:55:12,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 05:55:12,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208557054] [2021-08-26 05:55:12,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:55:12,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:12,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:55:12,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:55:12,438 INFO L87 Difference]: Start difference. First operand 241 states and 305 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:12,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:12,512 INFO L93 Difference]: Finished difference Result 465 states and 602 transitions. [2021-08-26 05:55:12,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 05:55:12,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-26 05:55:12,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:12,514 INFO L225 Difference]: With dead ends: 465 [2021-08-26 05:55:12,514 INFO L226 Difference]: Without dead ends: 364 [2021-08-26 05:55:12,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:55:12,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-26 05:55:12,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 286. [2021-08-26 05:55:12,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.3107142857142857) internal successors, (367), 285 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:12,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 367 transitions. [2021-08-26 05:55:12,526 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 367 transitions. Word has length 46 [2021-08-26 05:55:12,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:12,526 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 367 transitions. [2021-08-26 05:55:12,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 367 transitions. [2021-08-26 05:55:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 05:55:12,527 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:12,527 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-26 05:55:12,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:12,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:12,734 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:12,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:12,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2041640631, now seen corresponding path program 1 times [2021-08-26 05:55:12,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:12,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449649141] [2021-08-26 05:55:12,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:12,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:12,741 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:12,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991757410] [2021-08-26 05:55:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:12,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:12,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:12,742 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:55:12,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 05:55:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:55:13,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-26 05:55:13,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:55:14,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:14,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449649141] [2021-08-26 05:55:14,410 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:14,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991757410] [2021-08-26 05:55:14,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991757410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:14,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:14,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:55:14,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465020004] [2021-08-26 05:55:14,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 05:55:14,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:14,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 05:55:14,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-26 05:55:14,411 INFO L87 Difference]: Start difference. First operand 286 states and 367 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:14,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:14,752 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2021-08-26 05:55:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 05:55:14,752 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-26 05:55:14,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:14,753 INFO L225 Difference]: With dead ends: 306 [2021-08-26 05:55:14,754 INFO L226 Difference]: Without dead ends: 304 [2021-08-26 05:55:14,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:55:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-08-26 05:55:14,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 286. [2021-08-26 05:55:14,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.3035714285714286) internal successors, (365), 285 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:14,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 365 transitions. [2021-08-26 05:55:14,767 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 365 transitions. Word has length 46 [2021-08-26 05:55:14,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:14,767 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 365 transitions. [2021-08-26 05:55:14,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:14,767 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 365 transitions. [2021-08-26 05:55:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 05:55:14,768 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:14,768 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:55:14,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:14,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:14,990 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:14,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:14,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1100435366, now seen corresponding path program 3 times [2021-08-26 05:55:14,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:14,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537038512] [2021-08-26 05:55:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:14,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:15,003 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:15,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358887882] [2021-08-26 05:55:15,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:55:15,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:15,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:15,005 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:55:15,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-26 05:55:15,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 05:55:15,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:55:15,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 05:55:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-26 05:55:15,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:15,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537038512] [2021-08-26 05:55:15,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:15,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358887882] [2021-08-26 05:55:15,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358887882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:15,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:15,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-26 05:55:15,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234266697] [2021-08-26 05:55:15,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 05:55:15,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:15,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 05:55:15,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 05:55:15,820 INFO L87 Difference]: Start difference. First operand 286 states and 365 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:15,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:15,895 INFO L93 Difference]: Finished difference Result 286 states and 365 transitions. [2021-08-26 05:55:15,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 05:55:15,896 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-26 05:55:15,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:15,897 INFO L225 Difference]: With dead ends: 286 [2021-08-26 05:55:15,897 INFO L226 Difference]: Without dead ends: 284 [2021-08-26 05:55:15,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:55:15,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-08-26 05:55:15,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 241. [2021-08-26 05:55:15,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.2584745762711864) internal successors, (297), 240 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:15,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 297 transitions. [2021-08-26 05:55:15,909 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 297 transitions. Word has length 46 [2021-08-26 05:55:15,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:15,910 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 297 transitions. [2021-08-26 05:55:15,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:15,910 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 297 transitions. [2021-08-26 05:55:15,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-26 05:55:15,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:15,910 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:55:15,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:16,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-26 05:55:16,125 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:16,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:16,125 INFO L82 PathProgramCache]: Analyzing trace with hash -316772764, now seen corresponding path program 2 times [2021-08-26 05:55:16,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:16,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890920695] [2021-08-26 05:55:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:16,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:16,131 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:16,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100941952] [2021-08-26 05:55:16,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:55:16,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:16,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:16,136 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:55:16,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-26 05:55:16,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:55:16,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:55:16,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-26 05:55:16,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:55:17,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:17,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890920695] [2021-08-26 05:55:17,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:17,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100941952] [2021-08-26 05:55:17,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100941952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:17,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:17,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-08-26 05:55:17,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536342334] [2021-08-26 05:55:17,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 05:55:17,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:17,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 05:55:17,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:55:17,979 INFO L87 Difference]: Start difference. First operand 241 states and 297 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:18,980 INFO L93 Difference]: Finished difference Result 272 states and 333 transitions. [2021-08-26 05:55:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 05:55:18,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-26 05:55:18,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:18,982 INFO L225 Difference]: With dead ends: 272 [2021-08-26 05:55:18,982 INFO L226 Difference]: Without dead ends: 266 [2021-08-26 05:55:18,982 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 559.6ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-26 05:55:18,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-08-26 05:55:18,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2021-08-26 05:55:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.2568093385214008) internal successors, (323), 261 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:18,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 323 transitions. [2021-08-26 05:55:18,995 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 323 transitions. Word has length 49 [2021-08-26 05:55:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:18,996 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 323 transitions. [2021-08-26 05:55:18,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:18,996 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 323 transitions. [2021-08-26 05:55:18,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-26 05:55:18,996 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:18,996 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-26 05:55:19,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:19,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-26 05:55:19,205 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:19,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:19,205 INFO L82 PathProgramCache]: Analyzing trace with hash -231890065, now seen corresponding path program 2 times [2021-08-26 05:55:19,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:19,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675233141] [2021-08-26 05:55:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:19,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:19,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:19,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687079049] [2021-08-26 05:55:19,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:55:19,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:19,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:19,217 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:55:19,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-26 05:55:19,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:55:19,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:55:19,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 05:55:19,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:55:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:55:20,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:55:20,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675233141] [2021-08-26 05:55:20,146 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:55:20,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687079049] [2021-08-26 05:55:20,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687079049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:55:20,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:55:20,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:55:20,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768159202] [2021-08-26 05:55:20,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 05:55:20,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:55:20,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 05:55:20,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:55:20,148 INFO L87 Difference]: Start difference. First operand 262 states and 323 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:20,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:55:20,205 INFO L93 Difference]: Finished difference Result 297 states and 361 transitions. [2021-08-26 05:55:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 05:55:20,206 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-26 05:55:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:55:20,207 INFO L225 Difference]: With dead ends: 297 [2021-08-26 05:55:20,207 INFO L226 Difference]: Without dead ends: 287 [2021-08-26 05:55:20,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:55:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-26 05:55:20,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2021-08-26 05:55:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.2437275985663083) internal successors, (347), 283 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 347 transitions. [2021-08-26 05:55:20,228 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 347 transitions. Word has length 52 [2021-08-26 05:55:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:55:20,229 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 347 transitions. [2021-08-26 05:55:20,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:55:20,229 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 347 transitions. [2021-08-26 05:55:20,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-26 05:55:20,229 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:55:20,230 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:55:20,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-26 05:55:20,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-26 05:55:20,445 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:55:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:55:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1401161001, now seen corresponding path program 3 times [2021-08-26 05:55:20,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:55:20,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410876484] [2021-08-26 05:55:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:55:20,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:55:20,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:55:20,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091786131] [2021-08-26 05:55:20,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:55:20,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:55:20,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:55:20,459 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:55:20,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-26 05:55:46,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 05:55:46,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:55:46,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-26 05:55:46,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:56:43,905 WARN L207 SmtUtils]: Spent 16.55 s on a formula simplification that was a NOOP. DAG size: 4 [2021-08-26 05:56:53,774 WARN L207 SmtUtils]: Spent 7.34 s on a formula simplification that was a NOOP. DAG size: 4 [2021-08-26 05:57:10,647 WARN L207 SmtUtils]: Spent 16.52 s on a formula simplification that was a NOOP. DAG size: 16 [2021-08-26 05:57:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-26 05:57:10,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:57:10,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410876484] [2021-08-26 05:57:10,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:57:10,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091786131] [2021-08-26 05:57:10,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091786131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:57:10,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:57:10,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-08-26 05:57:10,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633699568] [2021-08-26 05:57:10,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 05:57:10,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:57:10,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 05:57:10,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=329, Unknown=1, NotChecked=0, Total=420 [2021-08-26 05:57:10,910 INFO L87 Difference]: Start difference. First operand 284 states and 347 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:57:30,873 WARN L207 SmtUtils]: Spent 11.36 s on a formula simplification. DAG size of input: 45 DAG size of output: 26 [2021-08-26 05:58:19,018 WARN L207 SmtUtils]: Spent 8.91 s on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2021-08-26 05:58:19,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:58:19,681 INFO L93 Difference]: Finished difference Result 350 states and 424 transitions. [2021-08-26 05:58:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-26 05:58:19,682 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-26 05:58:19,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:58:19,682 INFO L225 Difference]: With dead ends: 350 [2021-08-26 05:58:19,682 INFO L226 Difference]: Without dead ends: 340 [2021-08-26 05:58:19,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 104403.0ms TimeCoverageRelationStatistics Valid=419, Invalid=1140, Unknown=1, NotChecked=0, Total=1560 [2021-08-26 05:58:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-08-26 05:58:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 253. [2021-08-26 05:58:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 249 states have (on average 1.216867469879518) internal successors, (303), 252 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 303 transitions. [2021-08-26 05:58:19,698 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 303 transitions. Word has length 53 [2021-08-26 05:58:19,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:58:19,698 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 303 transitions. [2021-08-26 05:58:19,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:19,698 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 303 transitions. [2021-08-26 05:58:19,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-26 05:58:19,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:58:19,699 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-26 05:58:19,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-26 05:58:19,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-26 05:58:19,909 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:58:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:58:19,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1314219604, now seen corresponding path program 2 times [2021-08-26 05:58:19,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:58:19,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008690990] [2021-08-26 05:58:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:58:19,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:58:19,916 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:58:19,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043013437] [2021-08-26 05:58:19,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:58:19,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:58:19,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:58:19,920 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:58:19,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-26 05:58:20,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:58:20,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:58:20,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 05:58:20,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:58:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 5 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:58:20,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:58:20,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008690990] [2021-08-26 05:58:20,937 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:58:20,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043013437] [2021-08-26 05:58:20,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043013437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:58:20,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:58:20,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-26 05:58:20,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857920683] [2021-08-26 05:58:20,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 05:58:20,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:58:20,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 05:58:20,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-26 05:58:20,938 INFO L87 Difference]: Start difference. First operand 253 states and 303 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:21,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:58:21,002 INFO L93 Difference]: Finished difference Result 419 states and 514 transitions. [2021-08-26 05:58:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 05:58:21,002 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-26 05:58:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:58:21,003 INFO L225 Difference]: With dead ends: 419 [2021-08-26 05:58:21,003 INFO L226 Difference]: Without dead ends: 273 [2021-08-26 05:58:21,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:58:21,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-26 05:58:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2021-08-26 05:58:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 269 states have (on average 1.2007434944237918) internal successors, (323), 272 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:21,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 323 transitions. [2021-08-26 05:58:21,020 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 323 transitions. Word has length 54 [2021-08-26 05:58:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:58:21,020 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 323 transitions. [2021-08-26 05:58:21,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:21,021 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 323 transitions. [2021-08-26 05:58:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-26 05:58:21,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:58:21,021 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:58:21,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-26 05:58:21,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-26 05:58:21,237 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:58:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:58:21,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2103850292, now seen corresponding path program 2 times [2021-08-26 05:58:21,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:58:21,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271068044] [2021-08-26 05:58:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:58:21,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:58:21,245 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:58:21,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226138916] [2021-08-26 05:58:21,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 05:58:21,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:58:21,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:58:21,246 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:58:21,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-26 05:58:22,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 05:58:22,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:58:22,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 05:58:22,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:58:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:58:22,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:58:22,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271068044] [2021-08-26 05:58:22,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:58:22,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226138916] [2021-08-26 05:58:22,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226138916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:58:22,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:58:22,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-26 05:58:22,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241887620] [2021-08-26 05:58:22,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 05:58:22,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:58:22,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 05:58:22,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-26 05:58:22,296 INFO L87 Difference]: Start difference. First operand 273 states and 323 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:22,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:58:22,487 INFO L93 Difference]: Finished difference Result 482 states and 565 transitions. [2021-08-26 05:58:22,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 05:58:22,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-26 05:58:22,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:58:22,489 INFO L225 Difference]: With dead ends: 482 [2021-08-26 05:58:22,489 INFO L226 Difference]: Without dead ends: 472 [2021-08-26 05:58:22,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-26 05:58:22,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-08-26 05:58:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 315. [2021-08-26 05:58:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 311 states have (on average 1.2057877813504823) internal successors, (375), 314 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 375 transitions. [2021-08-26 05:58:22,508 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 375 transitions. Word has length 55 [2021-08-26 05:58:22,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:58:22,508 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 375 transitions. [2021-08-26 05:58:22,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 375 transitions. [2021-08-26 05:58:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-26 05:58:22,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:58:22,509 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:58:22,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-26 05:58:22,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:58:22,729 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:58:22,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:58:22,729 INFO L82 PathProgramCache]: Analyzing trace with hash -827141901, now seen corresponding path program 1 times [2021-08-26 05:58:22,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:58:22,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650233698] [2021-08-26 05:58:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:58:22,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:58:22,735 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:58:22,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707815827] [2021-08-26 05:58:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:58:22,736 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:58:22,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:58:22,737 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:58:22,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-26 05:58:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 05:58:23,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 05:58:23,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:58:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-08-26 05:58:23,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:58:23,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650233698] [2021-08-26 05:58:23,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:58:23,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707815827] [2021-08-26 05:58:23,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707815827] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 05:58:23,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 05:58:23,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 05:58:23,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081420002] [2021-08-26 05:58:23,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 05:58:23,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:58:23,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 05:58:23,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 05:58:23,826 INFO L87 Difference]: Start difference. First operand 315 states and 375 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:58:24,000 INFO L93 Difference]: Finished difference Result 361 states and 424 transitions. [2021-08-26 05:58:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 05:58:24,001 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-26 05:58:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:58:24,002 INFO L225 Difference]: With dead ends: 361 [2021-08-26 05:58:24,002 INFO L226 Difference]: Without dead ends: 353 [2021-08-26 05:58:24,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:58:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-26 05:58:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 263. [2021-08-26 05:58:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 259 states have (on average 1.1737451737451738) internal successors, (304), 262 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 304 transitions. [2021-08-26 05:58:24,018 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 304 transitions. Word has length 56 [2021-08-26 05:58:24,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:58:24,019 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 304 transitions. [2021-08-26 05:58:24,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 304 transitions. [2021-08-26 05:58:24,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-26 05:58:24,019 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:58:24,019 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:58:24,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-26 05:58:24,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-26 05:58:24,232 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:58:24,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:58:24,232 INFO L82 PathProgramCache]: Analyzing trace with hash -859252433, now seen corresponding path program 3 times [2021-08-26 05:58:24,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:58:24,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241632783] [2021-08-26 05:58:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:58:24,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:58:24,255 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:58:24,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686140100] [2021-08-26 05:58:24,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:58:24,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:58:24,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:58:24,257 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:58:24,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-26 05:58:25,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 05:58:25,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:58:25,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 05:58:25,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:58:25,429 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:58:25,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:58:25,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241632783] [2021-08-26 05:58:25,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:58:25,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686140100] [2021-08-26 05:58:25,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686140100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:58:25,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:58:25,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 05:58:25,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533521540] [2021-08-26 05:58:25,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 05:58:25,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:58:25,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 05:58:25,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:58:25,430 INFO L87 Difference]: Start difference. First operand 263 states and 304 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:25,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:58:25,523 INFO L93 Difference]: Finished difference Result 468 states and 553 transitions. [2021-08-26 05:58:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 05:58:25,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-26 05:58:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:58:25,524 INFO L225 Difference]: With dead ends: 468 [2021-08-26 05:58:25,524 INFO L226 Difference]: Without dead ends: 313 [2021-08-26 05:58:25,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-08-26 05:58:25,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-26 05:58:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 301. [2021-08-26 05:58:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 297 states have (on average 1.1616161616161615) internal successors, (345), 300 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 345 transitions. [2021-08-26 05:58:25,545 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 345 transitions. Word has length 58 [2021-08-26 05:58:25,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:58:25,545 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 345 transitions. [2021-08-26 05:58:25,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 9 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 345 transitions. [2021-08-26 05:58:25,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-26 05:58:25,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:58:25,546 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:58:25,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-26 05:58:25,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:58:25,749 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:58:25,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:58:25,749 INFO L82 PathProgramCache]: Analyzing trace with hash 798585380, now seen corresponding path program 3 times [2021-08-26 05:58:25,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:58:25,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060226222] [2021-08-26 05:58:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:58:25,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:58:25,756 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:58:25,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122174462] [2021-08-26 05:58:25,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 05:58:25,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:58:25,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:58:25,756 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:58:25,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-26 05:58:26,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 05:58:26,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:58:26,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 05:58:26,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:58:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:58:26,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:58:26,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060226222] [2021-08-26 05:58:26,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:58:26,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122174462] [2021-08-26 05:58:26,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122174462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:58:26,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:58:26,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-26 05:58:26,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482236390] [2021-08-26 05:58:26,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 05:58:26,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:58:26,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 05:58:26,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-26 05:58:26,942 INFO L87 Difference]: Start difference. First operand 301 states and 345 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:27,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:58:27,013 INFO L93 Difference]: Finished difference Result 314 states and 360 transitions. [2021-08-26 05:58:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 05:58:27,014 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-26 05:58:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:58:27,014 INFO L225 Difference]: With dead ends: 314 [2021-08-26 05:58:27,014 INFO L226 Difference]: Without dead ends: 310 [2021-08-26 05:58:27,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-08-26 05:58:27,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-08-26 05:58:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2021-08-26 05:58:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 306 states have (on average 1.1568627450980393) internal successors, (354), 309 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:27,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 354 transitions. [2021-08-26 05:58:27,035 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 354 transitions. Word has length 62 [2021-08-26 05:58:27,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:58:27,036 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 354 transitions. [2021-08-26 05:58:27,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 9 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:58:27,036 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 354 transitions. [2021-08-26 05:58:27,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-26 05:58:27,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:58:27,036 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:58:27,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-26 05:58:27,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:58:27,253 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:58:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:58:27,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1643788516, now seen corresponding path program 4 times [2021-08-26 05:58:27,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:58:27,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41463261] [2021-08-26 05:58:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:58:27,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:58:27,260 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:58:27,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577546117] [2021-08-26 05:58:27,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 05:58:27,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:58:27,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:58:27,261 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:58:27,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-26 05:59:03,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 05:59:03,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:59:03,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 05:59:03,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:03,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:03,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41463261] [2021-08-26 05:59:03,591 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:03,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577546117] [2021-08-26 05:59:03,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577546117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:03,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:03,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 05:59:03,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290267245] [2021-08-26 05:59:03,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 05:59:03,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:03,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 05:59:03,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:59:03,594 INFO L87 Difference]: Start difference. First operand 310 states and 354 transitions. Second operand has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:03,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:03,697 INFO L93 Difference]: Finished difference Result 518 states and 607 transitions. [2021-08-26 05:59:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 05:59:03,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-08-26 05:59:03,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:03,699 INFO L225 Difference]: With dead ends: 518 [2021-08-26 05:59:03,699 INFO L226 Difference]: Without dead ends: 363 [2021-08-26 05:59:03,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-08-26 05:59:03,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-08-26 05:59:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 335. [2021-08-26 05:59:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 331 states have (on average 1.151057401812689) internal successors, (381), 334 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 381 transitions. [2021-08-26 05:59:03,733 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 381 transitions. Word has length 68 [2021-08-26 05:59:03,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:03,733 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 381 transitions. [2021-08-26 05:59:03,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.181818181818182) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:03,733 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 381 transitions. [2021-08-26 05:59:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-26 05:59:03,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:03,734 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:03,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:03,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-26 05:59:03,947 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:59:03,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:03,947 INFO L82 PathProgramCache]: Analyzing trace with hash 818815641, now seen corresponding path program 4 times [2021-08-26 05:59:03,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:03,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795475446] [2021-08-26 05:59:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:03,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:03,957 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:03,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159843725] [2021-08-26 05:59:03,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 05:59:03,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:03,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:03,959 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:03,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-26 05:59:07,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 05:59:07,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:59:07,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 05:59:07,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:07,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:07,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795475446] [2021-08-26 05:59:07,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:07,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159843725] [2021-08-26 05:59:07,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159843725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:07,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:07,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-26 05:59:07,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335106233] [2021-08-26 05:59:07,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 05:59:07,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:07,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 05:59:07,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-08-26 05:59:07,564 INFO L87 Difference]: Start difference. First operand 335 states and 381 transitions. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:07,658 INFO L93 Difference]: Finished difference Result 348 states and 396 transitions. [2021-08-26 05:59:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 05:59:07,658 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-08-26 05:59:07,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:07,659 INFO L225 Difference]: With dead ends: 348 [2021-08-26 05:59:07,659 INFO L226 Difference]: Without dead ends: 344 [2021-08-26 05:59:07,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-08-26 05:59:07,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-08-26 05:59:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2021-08-26 05:59:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 340 states have (on average 1.1470588235294117) internal successors, (390), 343 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 390 transitions. [2021-08-26 05:59:07,683 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 390 transitions. Word has length 72 [2021-08-26 05:59:07,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:07,683 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 390 transitions. [2021-08-26 05:59:07,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:07,684 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 390 transitions. [2021-08-26 05:59:07,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-26 05:59:07,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:07,684 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:07,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-26 05:59:07,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-26 05:59:07,893 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:59:07,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:07,893 INFO L82 PathProgramCache]: Analyzing trace with hash -389368652, now seen corresponding path program 5 times [2021-08-26 05:59:07,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:07,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227274808] [2021-08-26 05:59:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:07,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:07,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:07,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37071745] [2021-08-26 05:59:07,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 05:59:07,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:07,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:07,903 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:07,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-26 05:59:09,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-26 05:59:09,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:59:09,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 05:59:09,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:09,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:09,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227274808] [2021-08-26 05:59:09,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:09,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37071745] [2021-08-26 05:59:09,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37071745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:09,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:09,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 05:59:09,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315778863] [2021-08-26 05:59:09,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 05:59:09,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:09,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 05:59:09,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-26 05:59:09,553 INFO L87 Difference]: Start difference. First operand 344 states and 390 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:09,671 INFO L93 Difference]: Finished difference Result 398 states and 449 transitions. [2021-08-26 05:59:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-26 05:59:09,671 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-26 05:59:09,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:09,672 INFO L225 Difference]: With dead ends: 398 [2021-08-26 05:59:09,672 INFO L226 Difference]: Without dead ends: 394 [2021-08-26 05:59:09,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-08-26 05:59:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-08-26 05:59:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 368. [2021-08-26 05:59:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 364 states have (on average 1.1456043956043955) internal successors, (417), 367 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:09,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 417 transitions. [2021-08-26 05:59:09,700 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 417 transitions. Word has length 76 [2021-08-26 05:59:09,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:09,700 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 417 transitions. [2021-08-26 05:59:09,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 417 transitions. [2021-08-26 05:59:09,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-26 05:59:09,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:09,701 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:09,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:09,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-26 05:59:09,915 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:59:09,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:09,916 INFO L82 PathProgramCache]: Analyzing trace with hash 301152857, now seen corresponding path program 5 times [2021-08-26 05:59:09,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:09,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132939262] [2021-08-26 05:59:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:09,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:09,923 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:09,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724779620] [2021-08-26 05:59:09,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 05:59:09,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:09,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:09,925 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:09,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-26 05:59:11,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-26 05:59:11,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:59:11,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 05:59:11,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 8 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:11,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:11,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132939262] [2021-08-26 05:59:11,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:11,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724779620] [2021-08-26 05:59:11,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724779620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:11,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:11,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 05:59:11,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070556970] [2021-08-26 05:59:11,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 05:59:11,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:11,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 05:59:11,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-26 05:59:11,712 INFO L87 Difference]: Start difference. First operand 368 states and 417 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:11,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:11,821 INFO L93 Difference]: Finished difference Result 555 states and 646 transitions. [2021-08-26 05:59:11,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-26 05:59:11,822 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-08-26 05:59:11,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:11,822 INFO L225 Difference]: With dead ends: 555 [2021-08-26 05:59:11,823 INFO L226 Difference]: Without dead ends: 400 [2021-08-26 05:59:11,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-08-26 05:59:11,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-08-26 05:59:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 378. [2021-08-26 05:59:11,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 374 states have (on average 1.13903743315508) internal successors, (426), 377 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 426 transitions. [2021-08-26 05:59:11,850 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 426 transitions. Word has length 78 [2021-08-26 05:59:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:11,850 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 426 transitions. [2021-08-26 05:59:11,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 11 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 426 transitions. [2021-08-26 05:59:11,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-26 05:59:11,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:11,858 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:11,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-26 05:59:12,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:12,058 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:59:12,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:12,059 INFO L82 PathProgramCache]: Analyzing trace with hash 631448244, now seen corresponding path program 6 times [2021-08-26 05:59:12,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:12,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206857368] [2021-08-26 05:59:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:12,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:12,066 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:12,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [687283517] [2021-08-26 05:59:12,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 05:59:12,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:12,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:12,067 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:12,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-26 05:59:13,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-26 05:59:13,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:59:13,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 05:59:13,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 11 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:13,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:13,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206857368] [2021-08-26 05:59:13,451 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:13,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687283517] [2021-08-26 05:59:13,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687283517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:13,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:13,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 05:59:13,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789717157] [2021-08-26 05:59:13,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 05:59:13,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:13,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 05:59:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:59:13,452 INFO L87 Difference]: Start difference. First operand 378 states and 426 transitions. Second operand has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:13,573 INFO L93 Difference]: Finished difference Result 586 states and 679 transitions. [2021-08-26 05:59:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 05:59:13,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-08-26 05:59:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:13,575 INFO L225 Difference]: With dead ends: 586 [2021-08-26 05:59:13,575 INFO L226 Difference]: Without dead ends: 431 [2021-08-26 05:59:13,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-08-26 05:59:13,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2021-08-26 05:59:13,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 403. [2021-08-26 05:59:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 399 states have (on average 1.1353383458646618) internal successors, (453), 402 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 453 transitions. [2021-08-26 05:59:13,609 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 453 transitions. Word has length 82 [2021-08-26 05:59:13,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:13,610 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 453 transitions. [2021-08-26 05:59:13,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.3076923076923075) internal successors, (82), 12 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:13,610 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 453 transitions. [2021-08-26 05:59:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-26 05:59:13,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:13,611 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:13,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:13,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-26 05:59:13,825 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:59:13,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:13,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1753648855, now seen corresponding path program 6 times [2021-08-26 05:59:13,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:13,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788477602] [2021-08-26 05:59:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:13,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:13,833 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:13,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027882208] [2021-08-26 05:59:13,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 05:59:13,833 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:13,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:13,834 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:13,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-26 05:59:14,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-26 05:59:14,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 05:59:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 05:59:14,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 05:59:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 05:59:15,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 05:59:15,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788477602] [2021-08-26 05:59:15,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-26 05:59:15,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027882208] [2021-08-26 05:59:15,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027882208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 05:59:15,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 05:59:15,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-26 05:59:15,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718467741] [2021-08-26 05:59:15,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 05:59:15,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 05:59:15,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 05:59:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-08-26 05:59:15,284 INFO L87 Difference]: Start difference. First operand 403 states and 453 transitions. Second operand has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:15,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 05:59:15,434 INFO L93 Difference]: Finished difference Result 416 states and 468 transitions. [2021-08-26 05:59:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 05:59:15,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-26 05:59:15,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 05:59:15,435 INFO L225 Difference]: With dead ends: 416 [2021-08-26 05:59:15,435 INFO L226 Difference]: Without dead ends: 412 [2021-08-26 05:59:15,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-08-26 05:59:15,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-08-26 05:59:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2021-08-26 05:59:15,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 408 states have (on average 1.1323529411764706) internal successors, (462), 411 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:15,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 462 transitions. [2021-08-26 05:59:15,471 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 462 transitions. Word has length 86 [2021-08-26 05:59:15,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 05:59:15,471 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 462 transitions. [2021-08-26 05:59:15,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 12 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 05:59:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 462 transitions. [2021-08-26 05:59:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-08-26 05:59:15,472 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 05:59:15,472 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 05:59:15,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:15,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-26 05:59:15,700 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-26 05:59:15,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 05:59:15,701 INFO L82 PathProgramCache]: Analyzing trace with hash -2078400471, now seen corresponding path program 7 times [2021-08-26 05:59:15,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 05:59:15,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703301683] [2021-08-26 05:59:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 05:59:15,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 05:59:15,708 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-26 05:59:15,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [22869865] [2021-08-26 05:59:15,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 05:59:15,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 05:59:15,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 05:59:15,709 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 05:59:15,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-26 05:59:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 05:59:16,942 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 05:59:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 05:59:17,069 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 05:59:17,072 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 05:59:17,073 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:59:17,074 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:59:17,085 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:59:17,085 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:59:17,085 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:59:17,085 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 05:59:17,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-26 05:59:17,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-26 05:59:17,311 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 05:59:17,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:59:17 BoogieIcfgContainer [2021-08-26 05:59:17,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 05:59:17,370 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 05:59:17,370 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 05:59:17,371 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 05:59:17,371 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:54:53" (3/4) ... [2021-08-26 05:59:17,372 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 05:59:17,418 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 05:59:17,419 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 05:59:17,419 INFO L168 Benchmark]: Toolchain (without parser) took 264197.70 ms. Allocated memory was 54.5 MB in the beginning and 524.3 MB in the end (delta: 469.8 MB). Free memory was 31.2 MB in the beginning and 316.6 MB in the end (delta: -285.4 MB). Peak memory consumption was 184.1 MB. Max. memory is 16.1 GB. [2021-08-26 05:59:17,420 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 54.5 MB. Free memory was 36.5 MB in the beginning and 36.5 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 05:59:17,420 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.75 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.0 MB in the beginning and 50.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2021-08-26 05:59:17,420 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.18 ms. Allocated memory is still 67.1 MB. Free memory was 50.1 MB in the beginning and 48.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 05:59:17,420 INFO L168 Benchmark]: Boogie Preprocessor took 34.70 ms. Allocated memory is still 67.1 MB. Free memory was 48.4 MB in the beginning and 47.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 05:59:17,421 INFO L168 Benchmark]: RCFGBuilder took 375.46 ms. Allocated memory is still 67.1 MB. Free memory was 47.1 MB in the beginning and 43.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-08-26 05:59:17,421 INFO L168 Benchmark]: TraceAbstraction took 263464.49 ms. Allocated memory was 67.1 MB in the beginning and 524.3 MB in the end (delta: 457.2 MB). Free memory was 43.5 MB in the beginning and 323.9 MB in the end (delta: -280.5 MB). Peak memory consumption was 175.1 MB. Max. memory is 16.1 GB. [2021-08-26 05:59:17,421 INFO L168 Benchmark]: Witness Printer took 48.49 ms. Allocated memory is still 524.3 MB. Free memory was 323.9 MB in the beginning and 316.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 05:59:17,425 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 54.5 MB. Free memory was 36.5 MB in the beginning and 36.5 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 228.75 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 31.0 MB in the beginning and 50.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.18 ms. Allocated memory is still 67.1 MB. Free memory was 50.1 MB in the beginning and 48.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.70 ms. Allocated memory is still 67.1 MB. Free memory was 48.4 MB in the beginning and 47.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 375.46 ms. Allocated memory is still 67.1 MB. Free memory was 47.1 MB in the beginning and 43.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 263464.49 ms. Allocated memory was 67.1 MB in the beginning and 524.3 MB in the end (delta: 457.2 MB). Free memory was 43.5 MB in the beginning and 323.9 MB in the end (delta: -280.5 MB). Peak memory consumption was 175.1 MB. Max. memory is 16.1 GB. * Witness Printer took 48.49 ms. Allocated memory is still 524.3 MB. Free memory was 323.9 MB in the beginning and 316.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y [L8] COND FALSE !(!cond) VAL [counter=0] [L8] COND FALSE !(!cond) VAL [counter=0] [L40] EXPR counter++ VAL [counter=1] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=1] [L46] EXPR counter++ VAL [counter=2] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L11] COND FALSE !(!(cond)) VAL [counter=2] [L51] COND TRUE !(c >= b) VAL [counter=2] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=2] [L40] EXPR counter++ VAL [counter=3] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=3] [L46] EXPR counter++ VAL [counter=4] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L11] COND FALSE !(!(cond)) VAL [counter=4] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [counter=4] [L46] EXPR counter++ VAL [counter=5] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L51] COND TRUE !(c >= b) VAL [counter=5] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=5] [L40] EXPR counter++ VAL [counter=6] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=6] [L46] EXPR counter++ VAL [counter=7] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=7] [L11] COND FALSE !(!(cond)) VAL [counter=7] [L11] COND FALSE !(!(cond)) VAL [counter=7] [L11] COND FALSE !(!(cond)) VAL [counter=7] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [counter=7] [L46] EXPR counter++ VAL [counter=8] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=8] [L11] COND FALSE !(!(cond)) VAL [counter=8] [L11] COND FALSE !(!(cond)) VAL [counter=8] [L11] COND FALSE !(!(cond)) VAL [counter=8] [L51] COND TRUE !(c >= b) VAL [counter=8] [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=8] [L40] EXPR counter++ VAL [counter=9] [L40] COND TRUE counter++<10 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 VAL [counter=9] [L46] EXPR counter++ VAL [counter=10] [L46] COND TRUE counter++<10 [L11] COND FALSE !(!(cond)) VAL [counter=10] [L11] COND FALSE !(!(cond)) VAL [counter=10] [L11] COND FALSE !(!(cond)) VAL [counter=10] [L11] COND FALSE !(!(cond)) VAL [counter=10] [L51] COND FALSE !(!(c >= b)) [L53] c = c - b [L54] k = k + 1 VAL [counter=10] [L46] EXPR counter++ VAL [counter=11] [L46] COND FALSE !(counter++<10) [L57] a = b [L58] b = c [L60] long long temp; [L61] temp = p [L62] p = q [L63] q = temp - q * k [L64] temp = r [L65] r = s [L66] s = temp - s * k VAL [counter=11] [L40] EXPR counter++ VAL [counter=12] [L40] COND FALSE !(counter++<10) [L11] COND TRUE !(cond) VAL [counter=12] [L13] reach_error() VAL [counter=12] - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 13]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 43 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 263371.1ms, OverallIterations: 40, TraceHistogramMax: 7, EmptinessCheckTime: 39.3ms, AutomataDifference: 74218.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1497 SDtfs, 2766 SDslu, 5333 SDs, 0 SdLazy, 3233 SolverSat, 607 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5708.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1802 GetRequests, 1377 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 107672.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=412occurred in iteration=39, InterpolantAutomatonStates: 435, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 534.6ms AutomataMinimizationTime, 39 MinimizatonAttempts, 874 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 342.7ms SsaConstructionTime, 64560.3ms SatisfiabilityAnalysisTime, 95176.7ms InterpolantComputationTime, 1758 NumberOfCodeBlocks, 1714 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 1627 ConstructedInterpolants, 0 QuantifiedInterpolants, 10259 SizeOfPredicates, 294 NumberOfNonLiveVariables, 7234 ConjunctsInSsa, 723 ConjunctsInUnsatCore, 39 InterpolantComputations, 10 PerfectInterpolantSequences, 242/1370 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 05:59:17,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...