./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa --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 c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:58:14,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:58:14,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:58:14,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:58:14,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:58:14,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:58:14,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:58:14,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:58:14,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:58:14,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:58:14,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:58:14,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:58:14,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:58:14,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:58:14,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:58:14,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:58:14,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:58:14,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:58:14,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:58:14,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:58:14,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:58:14,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:58:14,530 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:58:14,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:58:14,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:58:14,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:58:14,535 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:58:14,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:58:14,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:58:14,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:58:14,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:58:14,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:58:14,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:58:14,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:58:14,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:58:14,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:58:14,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:58:14,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:58:14,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:58:14,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:58:14,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:58:14,544 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:58:14,565 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:58:14,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:58:14,565 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:58:14,565 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:58:14,566 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:58:14,566 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:58:14,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:58:14,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:58:14,567 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:58:14,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:58:14,567 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:58:14,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:58:14,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:58:14,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:58:14,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:58:14,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:58:14,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:58:14,568 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:58:14,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:58:14,569 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:58:14,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:58:14,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:58:14,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:58:14,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:58:14,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:58:14,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:58:14,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:58:14,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:58:14,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:58:14,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:58:14,570 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:58:14,570 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:58:14,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:58:14,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:58:14,571 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e [2021-12-07 00:58:14,762 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:58:14,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:58:14,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:58:14,779 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:58:14,780 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:58:14,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-12-07 00:58:14,827 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/data/e675a2c85/f3d25def5d7544bda09889365182a9c9/FLAG613370f82 [2021-12-07 00:58:15,205 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:58:15,206 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-12-07 00:58:15,211 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/data/e675a2c85/f3d25def5d7544bda09889365182a9c9/FLAG613370f82 [2021-12-07 00:58:15,220 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/data/e675a2c85/f3d25def5d7544bda09889365182a9c9 [2021-12-07 00:58:15,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:58:15,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:58:15,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:58:15,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:58:15,227 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:58:15,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:58:15" (1/1) ... [2021-12-07 00:58:15,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28fcc552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:58:15, skipping insertion in model container [2021-12-07 00:58:15,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:58:15" (1/1) ... [2021-12-07 00:58:15,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:58:15,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:58:15,356 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2021-12-07 00:58:15,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:58:15,381 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:58:15,391 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2021-12-07 00:58:15,400 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:58:15,411 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:58:15,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:58:15 WrapperNode [2021-12-07 00:58:15,411 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:58:15,412 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:58:15,412 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:58:15,412 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:58:15,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:58:15" (1/1) ... [2021-12-07 00:58:15,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:58:15" (1/1) ... [2021-12-07 00:58:15,444 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2021-12-07 00:58:15,445 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:58:15,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:58:15,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:58:15,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:58:15,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:58:15" (1/1) ... [2021-12-07 00:58:15,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:58:15" (1/1) ... [2021-12-07 00:58:15,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:58:15" (1/1) ... [2021-12-07 00:58:15,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:58:15" (1/1) ... [2021-12-07 00:58:15,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:58:15" (1/1) ... [2021-12-07 00:58:15,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:58:15" (1/1) ... [2021-12-07 00:58:15,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:58:15" (1/1) ... [2021-12-07 00:58:15,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:58:15,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:58:15,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:58:15,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:58:15,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:58:15" (1/1) ... [2021-12-07 00:58:15,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:58:15,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:15,493 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:58:15,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:58:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:58:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-07 00:58:15,522 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-07 00:58:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:58:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:58:15,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:58:15,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 00:58:15,523 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 00:58:15,570 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:58:15,572 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:58:15,656 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:58:15,660 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:58:15,661 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-07 00:58:15,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:58:15 BoogieIcfgContainer [2021-12-07 00:58:15,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:58:15,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:58:15,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:58:15,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:58:15,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:58:15" (1/3) ... [2021-12-07 00:58:15,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ef6912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:58:15, skipping insertion in model container [2021-12-07 00:58:15,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:58:15" (2/3) ... [2021-12-07 00:58:15,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ef6912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:58:15, skipping insertion in model container [2021-12-07 00:58:15,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:58:15" (3/3) ... [2021-12-07 00:58:15,668 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2021-12-07 00:58:15,672 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:58:15,673 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:58:15,709 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:58:15,714 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:58:15,714 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:58:15,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-07 00:58:15,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-07 00:58:15,730 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:15,730 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:15,731 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:15,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:15,735 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2021-12-07 00:58:15,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:15,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698463792] [2021-12-07 00:58:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:15,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:15,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-07 00:58:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:15,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-07 00:58:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:15,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-07 00:58:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:15,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-07 00:58:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:58:15,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:15,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698463792] [2021-12-07 00:58:15,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698463792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:15,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:15,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:58:15,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804274118] [2021-12-07 00:58:15,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:15,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:58:15,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:15,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:58:15,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:58:15,900 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:58:15,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:15,917 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2021-12-07 00:58:15,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:58:15,919 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-07 00:58:15,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:15,925 INFO L225 Difference]: With dead ends: 67 [2021-12-07 00:58:15,925 INFO L226 Difference]: Without dead ends: 31 [2021-12-07 00:58:15,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:58:15,931 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:15,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:58:15,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-07 00:58:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-07 00:58:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 00:58:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-12-07 00:58:15,962 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2021-12-07 00:58:15,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:15,962 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-12-07 00:58:15,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:58:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-12-07 00:58:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-07 00:58:15,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:15,964 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:15,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:58:15,964 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:15,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2021-12-07 00:58:15,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:15,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744323745] [2021-12-07 00:58:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:15,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:15,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:15,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809695273] [2021-12-07 00:58:15,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:15,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:15,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:15,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:16,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:58:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:16,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:58:16,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 00:58:16,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:58:16,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:16,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744323745] [2021-12-07 00:58:16,176 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:16,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809695273] [2021-12-07 00:58:16,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809695273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:16,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:16,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:58:16,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766843123] [2021-12-07 00:58:16,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:16,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:58:16,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:16,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:58:16,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:58:16,179 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 00:58:16,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:16,251 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-12-07 00:58:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:58:16,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-12-07 00:58:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:16,253 INFO L225 Difference]: With dead ends: 50 [2021-12-07 00:58:16,253 INFO L226 Difference]: Without dead ends: 43 [2021-12-07 00:58:16,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:58:16,255 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:16,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 135 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:58:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-07 00:58:16,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-07 00:58:16,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-07 00:58:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-07 00:58:16,268 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2021-12-07 00:58:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:16,268 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-07 00:58:16,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 00:58:16,269 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-07 00:58:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-07 00:58:16,270 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:16,270 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:16,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:58:16,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:16,473 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:16,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:16,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2021-12-07 00:58:16,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:16,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18681601] [2021-12-07 00:58:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:16,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:16,539 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:16,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200724576] [2021-12-07 00:58:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:16,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:16,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:16,545 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:16,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:58:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:16,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:58:16,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:58:16,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:58:16,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:16,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18681601] [2021-12-07 00:58:16,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:16,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200724576] [2021-12-07 00:58:16,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200724576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:16,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:16,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:58:16,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899243082] [2021-12-07 00:58:16,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:16,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:58:16,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:58:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:58:16,749 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 00:58:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:16,780 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-12-07 00:58:16,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:58:16,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-12-07 00:58:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:16,782 INFO L225 Difference]: With dead ends: 49 [2021-12-07 00:58:16,782 INFO L226 Difference]: Without dead ends: 47 [2021-12-07 00:58:16,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:58:16,784 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:16,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 146 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:58:16,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-07 00:58:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-07 00:58:16,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-07 00:58:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-12-07 00:58:16,795 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2021-12-07 00:58:16,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:16,795 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-12-07 00:58:16,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 00:58:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-12-07 00:58:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-07 00:58:16,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:16,797 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:16,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:58:16,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:16,999 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:17,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2021-12-07 00:58:17,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:17,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409621201] [2021-12-07 00:58:17,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:17,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:17,055 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:17,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836011863] [2021-12-07 00:58:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:17,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:17,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:17,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:17,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:58:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:17,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:58:17,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 00:58:17,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 00:58:17,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:17,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409621201] [2021-12-07 00:58:17,263 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:17,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836011863] [2021-12-07 00:58:17,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836011863] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:17,263 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:58:17,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-07 00:58:17,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963769546] [2021-12-07 00:58:17,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:17,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:58:17,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:17,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:58:17,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:58:17,265 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:58:17,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:17,364 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2021-12-07 00:58:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:58:17,364 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-12-07 00:58:17,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:17,366 INFO L225 Difference]: With dead ends: 99 [2021-12-07 00:58:17,366 INFO L226 Difference]: Without dead ends: 92 [2021-12-07 00:58:17,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:58:17,368 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:17,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 224 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:58:17,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-07 00:58:17,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-12-07 00:58:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-07 00:58:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2021-12-07 00:58:17,386 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2021-12-07 00:58:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:17,386 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2021-12-07 00:58:17,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:58:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2021-12-07 00:58:17,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 00:58:17,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:17,388 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:17,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:58:17,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:17,590 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:17,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:17,592 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2021-12-07 00:58:17,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:17,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036929852] [2021-12-07 00:58:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:17,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:17,639 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:17,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115197028] [2021-12-07 00:58:17,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:17,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:17,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:17,641 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:17,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:58:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:17,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 00:58:17,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:58:17,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:58:17,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:17,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036929852] [2021-12-07 00:58:17,742 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:17,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115197028] [2021-12-07 00:58:17,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115197028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:17,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:17,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:58:17,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163270271] [2021-12-07 00:58:17,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:17,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:58:17,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:17,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:58:17,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:58:17,744 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 00:58:17,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:17,775 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2021-12-07 00:58:17,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:58:17,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-12-07 00:58:17,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:17,776 INFO L225 Difference]: With dead ends: 75 [2021-12-07 00:58:17,776 INFO L226 Difference]: Without dead ends: 73 [2021-12-07 00:58:17,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:58:17,777 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:17,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 142 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:58:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-07 00:58:17,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-12-07 00:58:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-07 00:58:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-12-07 00:58:17,788 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2021-12-07 00:58:17,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:17,788 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-12-07 00:58:17,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 00:58:17,788 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-12-07 00:58:17,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 00:58:17,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:17,790 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:17,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:58:17,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:17,991 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:17,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:17,993 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2021-12-07 00:58:17,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:17,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570042309] [2021-12-07 00:58:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:17,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:18,032 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:18,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253189557] [2021-12-07 00:58:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:18,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:18,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:18,034 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:18,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:58:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:18,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 00:58:18,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:58:18,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:58:18,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:18,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570042309] [2021-12-07 00:58:18,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:18,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253189557] [2021-12-07 00:58:18,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253189557] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:18,311 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:58:18,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-12-07 00:58:18,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789951033] [2021-12-07 00:58:18,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:18,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:58:18,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:18,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:58:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:58:18,313 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 00:58:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:18,360 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2021-12-07 00:58:18,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:58:18,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-12-07 00:58:18,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:18,362 INFO L225 Difference]: With dead ends: 95 [2021-12-07 00:58:18,362 INFO L226 Difference]: Without dead ends: 93 [2021-12-07 00:58:18,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:58:18,364 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:18,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 262 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2021-12-07 00:58:18,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-07 00:58:18,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2021-12-07 00:58:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.2419354838709677) internal successors, (77), 63 states have internal predecessors, (77), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-07 00:58:18,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2021-12-07 00:58:18,379 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 38 [2021-12-07 00:58:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:18,379 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2021-12-07 00:58:18,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 00:58:18,380 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2021-12-07 00:58:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 00:58:18,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:18,381 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:18,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-07 00:58:18,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:18,582 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:18,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2021-12-07 00:58:18,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:18,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696985751] [2021-12-07 00:58:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:18,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:18,640 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:18,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875717728] [2021-12-07 00:58:18,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:18,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:18,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:18,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:18,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:58:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:18,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:58:18,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-07 00:58:18,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:58:18,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:18,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696985751] [2021-12-07 00:58:18,792 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:18,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875717728] [2021-12-07 00:58:18,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875717728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:18,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:18,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:58:18,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782590366] [2021-12-07 00:58:18,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:18,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:58:18,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:58:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:58:18,793 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 00:58:18,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:18,827 INFO L93 Difference]: Finished difference Result 126 states and 175 transitions. [2021-12-07 00:58:18,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:58:18,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-12-07 00:58:18,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:18,829 INFO L225 Difference]: With dead ends: 126 [2021-12-07 00:58:18,829 INFO L226 Difference]: Without dead ends: 124 [2021-12-07 00:58:18,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:58:18,830 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:18,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 135 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:58:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-07 00:58:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2021-12-07 00:58:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 76 states have internal predecessors, (95), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-07 00:58:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 168 transitions. [2021-12-07 00:58:18,844 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 168 transitions. Word has length 43 [2021-12-07 00:58:18,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:18,845 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 168 transitions. [2021-12-07 00:58:18,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-07 00:58:18,845 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 168 transitions. [2021-12-07 00:58:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 00:58:18,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:18,846 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:18,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:58:19,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:19,048 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:19,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:19,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2021-12-07 00:58:19,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:19,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221740557] [2021-12-07 00:58:19,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:19,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:19,082 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:19,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924228836] [2021-12-07 00:58:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:19,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:19,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:19,086 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:19,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:58:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:19,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 00:58:19,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:58:19,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:19,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:19,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221740557] [2021-12-07 00:58:19,391 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:19,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924228836] [2021-12-07 00:58:19,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924228836] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:19,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:58:19,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-07 00:58:19,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709800984] [2021-12-07 00:58:19,391 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:19,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:58:19,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:19,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:58:19,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:58:19,392 INFO L87 Difference]: Start difference. First operand 119 states and 168 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 00:58:19,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:19,496 INFO L93 Difference]: Finished difference Result 133 states and 180 transitions. [2021-12-07 00:58:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:58:19,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2021-12-07 00:58:19,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:19,498 INFO L225 Difference]: With dead ends: 133 [2021-12-07 00:58:19,498 INFO L226 Difference]: Without dead ends: 131 [2021-12-07 00:58:19,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:58:19,499 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:19,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 242 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:58:19,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-07 00:58:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-12-07 00:58:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 82 states have internal predecessors, (101), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-07 00:58:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 174 transitions. [2021-12-07 00:58:19,513 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 174 transitions. Word has length 43 [2021-12-07 00:58:19,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:19,513 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 174 transitions. [2021-12-07 00:58:19,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 00:58:19,514 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 174 transitions. [2021-12-07 00:58:19,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-07 00:58:19,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:19,514 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:19,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-07 00:58:19,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-07 00:58:19,715 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:19,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2021-12-07 00:58:19,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:19,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204938161] [2021-12-07 00:58:19,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:19,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:19,724 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:19,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004528981] [2021-12-07 00:58:19,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:58:19,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:19,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:19,725 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:19,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:58:19,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:58:19,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:58:19,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:58:19,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:58:19,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:58:19,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:19,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204938161] [2021-12-07 00:58:19,797 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:19,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004528981] [2021-12-07 00:58:19,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004528981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:19,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:19,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:58:19,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175240031] [2021-12-07 00:58:19,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:19,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:58:19,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:19,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:58:19,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:58:19,799 INFO L87 Difference]: Start difference. First operand 127 states and 174 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 00:58:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:19,851 INFO L93 Difference]: Finished difference Result 166 states and 226 transitions. [2021-12-07 00:58:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:58:19,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-12-07 00:58:19,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:19,852 INFO L225 Difference]: With dead ends: 166 [2021-12-07 00:58:19,853 INFO L226 Difference]: Without dead ends: 110 [2021-12-07 00:58:19,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:58:19,854 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:19,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 164 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:58:19,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-07 00:58:19,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 102. [2021-12-07 00:58:19,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.1875) internal successors, (76), 65 states have internal predecessors, (76), 29 states have call successors, (29), 8 states have call predecessors, (29), 8 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-07 00:58:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 133 transitions. [2021-12-07 00:58:19,869 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 133 transitions. Word has length 43 [2021-12-07 00:58:19,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:19,869 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 133 transitions. [2021-12-07 00:58:19,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-07 00:58:19,869 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 133 transitions. [2021-12-07 00:58:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-07 00:58:19,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:19,871 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:19,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:58:20,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:20,071 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:20,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:20,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2021-12-07 00:58:20,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:20,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19064424] [2021-12-07 00:58:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:20,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:20,083 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:20,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914554010] [2021-12-07 00:58:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:20,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:20,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:20,084 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:20,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:58:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:20,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:58:20,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:20,180 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 00:58:20,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:58:20,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:20,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19064424] [2021-12-07 00:58:20,180 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:20,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914554010] [2021-12-07 00:58:20,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914554010] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:20,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:20,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:58:20,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722310813] [2021-12-07 00:58:20,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:20,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:58:20,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:20,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:58:20,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:58:20,182 INFO L87 Difference]: Start difference. First operand 102 states and 133 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 00:58:20,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:20,224 INFO L93 Difference]: Finished difference Result 154 states and 217 transitions. [2021-12-07 00:58:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:58:20,224 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-12-07 00:58:20,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:20,225 INFO L225 Difference]: With dead ends: 154 [2021-12-07 00:58:20,225 INFO L226 Difference]: Without dead ends: 152 [2021-12-07 00:58:20,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:58:20,226 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:20,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:58:20,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-07 00:58:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2021-12-07 00:58:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 73 states have (on average 1.1643835616438356) internal successors, (85), 80 states have internal predecessors, (85), 53 states have call successors, (53), 9 states have call predecessors, (53), 9 states have return successors, (52), 46 states have call predecessors, (52), 52 states have call successors, (52) [2021-12-07 00:58:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 190 transitions. [2021-12-07 00:58:20,241 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 190 transitions. Word has length 48 [2021-12-07 00:58:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:20,242 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 190 transitions. [2021-12-07 00:58:20,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 00:58:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 190 transitions. [2021-12-07 00:58:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-07 00:58:20,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:20,243 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:20,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:58:20,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:58:20,443 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:20,444 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2021-12-07 00:58:20,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:20,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054255344] [2021-12-07 00:58:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:20,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:20,451 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:20,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97428324] [2021-12-07 00:58:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:20,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:20,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:20,453 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:20,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:58:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:20,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-07 00:58:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 00:58:20,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-07 00:58:21,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:21,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054255344] [2021-12-07 00:58:21,711 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:21,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97428324] [2021-12-07 00:58:21,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97428324] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:21,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:58:21,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2021-12-07 00:58:21,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853839817] [2021-12-07 00:58:21,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:21,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-07 00:58:21,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:21,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-07 00:58:21,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:58:21,713 INFO L87 Difference]: Start difference. First operand 136 states and 190 transitions. Second operand has 23 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-07 00:58:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:33,699 INFO L93 Difference]: Finished difference Result 310 states and 449 transitions. [2021-12-07 00:58:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-07 00:58:33,700 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2021-12-07 00:58:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:33,702 INFO L225 Difference]: With dead ends: 310 [2021-12-07 00:58:33,702 INFO L226 Difference]: Without dead ends: 241 [2021-12-07 00:58:33,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=548, Invalid=2208, Unknown=0, NotChecked=0, Total=2756 [2021-12-07 00:58:33,704 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 127 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:33,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 392 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-07 00:58:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-12-07 00:58:33,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 199. [2021-12-07 00:58:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 114 states have (on average 1.1754385964912282) internal successors, (134), 121 states have internal predecessors, (134), 73 states have call successors, (73), 11 states have call predecessors, (73), 11 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-07 00:58:33,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 279 transitions. [2021-12-07 00:58:33,736 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 279 transitions. Word has length 60 [2021-12-07 00:58:33,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:33,736 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 279 transitions. [2021-12-07 00:58:33,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-07 00:58:33,736 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 279 transitions. [2021-12-07 00:58:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-07 00:58:33,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:33,737 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:33,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-07 00:58:33,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-07 00:58:33,938 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:33,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:33,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2021-12-07 00:58:33,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:33,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232209445] [2021-12-07 00:58:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:33,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:33,949 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:33,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063885725] [2021-12-07 00:58:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:33,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:33,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:33,950 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:33,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:58:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:33,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-07 00:58:33,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-07 00:58:34,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-07 00:58:34,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:34,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232209445] [2021-12-07 00:58:34,168 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:34,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063885725] [2021-12-07 00:58:34,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063885725] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:34,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:58:34,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-12-07 00:58:34,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718276578] [2021-12-07 00:58:34,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:34,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:58:34,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:34,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:58:34,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:58:34,170 INFO L87 Difference]: Start difference. First operand 199 states and 279 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-07 00:58:34,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:34,307 INFO L93 Difference]: Finished difference Result 287 states and 420 transitions. [2021-12-07 00:58:34,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 00:58:34,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 70 [2021-12-07 00:58:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:34,310 INFO L225 Difference]: With dead ends: 287 [2021-12-07 00:58:34,310 INFO L226 Difference]: Without dead ends: 285 [2021-12-07 00:58:34,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:58:34,312 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:34,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 245 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:58:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-07 00:58:34,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 203. [2021-12-07 00:58:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 117 states have (on average 1.170940170940171) internal successors, (137), 124 states have internal predecessors, (137), 73 states have call successors, (73), 12 states have call predecessors, (73), 12 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-07 00:58:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 282 transitions. [2021-12-07 00:58:34,350 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 282 transitions. Word has length 70 [2021-12-07 00:58:34,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:34,350 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 282 transitions. [2021-12-07 00:58:34,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 4 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-07 00:58:34,351 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 282 transitions. [2021-12-07 00:58:34,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-07 00:58:34,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:34,352 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:34,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 00:58:34,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-07 00:58:34,553 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:34,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2021-12-07 00:58:34,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:34,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530826525] [2021-12-07 00:58:34,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:34,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:34,588 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:34,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242909862] [2021-12-07 00:58:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:34,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:34,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:34,591 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:34,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:58:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:34,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 00:58:34,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-07 00:58:34,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-07 00:58:34,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:34,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530826525] [2021-12-07 00:58:34,955 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:34,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242909862] [2021-12-07 00:58:34,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242909862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:34,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:58:34,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-12-07 00:58:34,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533992645] [2021-12-07 00:58:34,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:34,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 00:58:34,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 00:58:34,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:58:34,957 INFO L87 Difference]: Start difference. First operand 203 states and 282 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 00:58:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:35,329 INFO L93 Difference]: Finished difference Result 250 states and 347 transitions. [2021-12-07 00:58:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:58:35,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 68 [2021-12-07 00:58:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:35,331 INFO L225 Difference]: With dead ends: 250 [2021-12-07 00:58:35,331 INFO L226 Difference]: Without dead ends: 248 [2021-12-07 00:58:35,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-12-07 00:58:35,332 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:35,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 324 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:58:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-07 00:58:35,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 211. [2021-12-07 00:58:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 123 states have (on average 1.1626016260162602) internal successors, (143), 130 states have internal predecessors, (143), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-07 00:58:35,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 288 transitions. [2021-12-07 00:58:35,364 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 288 transitions. Word has length 68 [2021-12-07 00:58:35,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:35,364 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 288 transitions. [2021-12-07 00:58:35,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 00:58:35,364 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 288 transitions. [2021-12-07 00:58:35,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-07 00:58:35,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:35,365 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:35,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-07 00:58:35,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:35,567 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:35,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:35,568 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2021-12-07 00:58:35,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:35,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133148103] [2021-12-07 00:58:35,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:35,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:35,583 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:35,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705746454] [2021-12-07 00:58:35,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:58:35,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:35,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:35,584 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:35,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:58:35,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:58:35,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:58:35,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:58:35,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-07 00:58:35,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:58:35,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:35,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133148103] [2021-12-07 00:58:35,684 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:35,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705746454] [2021-12-07 00:58:35,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705746454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:58:35,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:58:35,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:58:35,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135464830] [2021-12-07 00:58:35,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:58:35,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:58:35,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:35,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:58:35,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:58:35,685 INFO L87 Difference]: Start difference. First operand 211 states and 288 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 00:58:35,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:35,740 INFO L93 Difference]: Finished difference Result 363 states and 496 transitions. [2021-12-07 00:58:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:58:35,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2021-12-07 00:58:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:35,742 INFO L225 Difference]: With dead ends: 363 [2021-12-07 00:58:35,742 INFO L226 Difference]: Without dead ends: 231 [2021-12-07 00:58:35,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:58:35,743 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:35,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:58:35,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-07 00:58:35,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2021-12-07 00:58:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 133 states have internal predecessors, (156), 73 states have call successors, (73), 14 states have call predecessors, (73), 14 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-07 00:58:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 301 transitions. [2021-12-07 00:58:35,774 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 301 transitions. Word has length 73 [2021-12-07 00:58:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:35,774 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 301 transitions. [2021-12-07 00:58:35,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-07 00:58:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 301 transitions. [2021-12-07 00:58:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-07 00:58:35,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:35,775 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:35,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-07 00:58:35,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:35,977 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:35,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:35,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 3 times [2021-12-07 00:58:35,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:35,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343100230] [2021-12-07 00:58:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:35,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:36,004 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:36,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18756977] [2021-12-07 00:58:36,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:58:36,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:36,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:36,007 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:36,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-07 00:58:36,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-07 00:58:36,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:58:36,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-07 00:58:36,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-07 00:58:36,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-07 00:58:39,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:39,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343100230] [2021-12-07 00:58:39,875 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:39,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18756977] [2021-12-07 00:58:39,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18756977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:39,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:58:39,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-12-07 00:58:39,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623792511] [2021-12-07 00:58:39,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:39,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 00:58:39,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:39,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 00:58:39,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=393, Unknown=1, NotChecked=0, Total=462 [2021-12-07 00:58:39,877 INFO L87 Difference]: Start difference. First operand 220 states and 301 transitions. Second operand has 22 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-07 00:58:44,057 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:58:44,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:44,702 INFO L93 Difference]: Finished difference Result 278 states and 380 transitions. [2021-12-07 00:58:44,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-07 00:58:44,702 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 73 [2021-12-07 00:58:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:44,704 INFO L225 Difference]: With dead ends: 278 [2021-12-07 00:58:44,704 INFO L226 Difference]: Without dead ends: 274 [2021-12-07 00:58:44,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=303, Invalid=1336, Unknown=1, NotChecked=0, Total=1640 [2021-12-07 00:58:44,705 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 106 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 169 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:44,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 568 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 750 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-12-07 00:58:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-12-07 00:58:44,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 222. [2021-12-07 00:58:44,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 134 states have (on average 1.171641791044776) internal successors, (157), 134 states have internal predecessors, (157), 73 states have call successors, (73), 15 states have call predecessors, (73), 14 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-07 00:58:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 302 transitions. [2021-12-07 00:58:44,750 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 302 transitions. Word has length 73 [2021-12-07 00:58:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:44,750 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 302 transitions. [2021-12-07 00:58:44,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-12-07 00:58:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 302 transitions. [2021-12-07 00:58:44,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-07 00:58:44,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:44,751 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:44,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-07 00:58:44,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 00:58:44,952 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2021-12-07 00:58:44,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:44,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851082763] [2021-12-07 00:58:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:44,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:44,959 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:44,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1384994898] [2021-12-07 00:58:44,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:44,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:44,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:44,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:44,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-07 00:58:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:44,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-07 00:58:44,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-07 00:58:47,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:51,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:51,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851082763] [2021-12-07 00:58:51,031 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:51,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384994898] [2021-12-07 00:58:51,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384994898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:58:51,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:58:51,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-07 00:58:51,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088336881] [2021-12-07 00:58:51,032 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:51,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 00:58:51,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:51,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 00:58:51,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-12-07 00:58:51,033 INFO L87 Difference]: Start difference. First operand 222 states and 302 transitions. Second operand has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-07 00:58:53,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:53,434 INFO L93 Difference]: Finished difference Result 316 states and 429 transitions. [2021-12-07 00:58:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 00:58:53,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 87 [2021-12-07 00:58:53,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:53,436 INFO L225 Difference]: With dead ends: 316 [2021-12-07 00:58:53,436 INFO L226 Difference]: Without dead ends: 311 [2021-12-07 00:58:53,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 00:58:53,437 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 70 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:53,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 711 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-07 00:58:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-12-07 00:58:53,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 291. [2021-12-07 00:58:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 171 states have (on average 1.1871345029239766) internal successors, (203), 171 states have internal predecessors, (203), 101 states have call successors, (101), 19 states have call predecessors, (101), 18 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2021-12-07 00:58:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 404 transitions. [2021-12-07 00:58:53,499 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 404 transitions. Word has length 87 [2021-12-07 00:58:53,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:53,499 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 404 transitions. [2021-12-07 00:58:53,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-12-07 00:58:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 404 transitions. [2021-12-07 00:58:53,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-07 00:58:53,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:53,503 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:53,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-07 00:58:53,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-07 00:58:53,705 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:53,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1330396859, now seen corresponding path program 2 times [2021-12-07 00:58:53,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:53,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986523254] [2021-12-07 00:58:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:53,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:53,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:53,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929630809] [2021-12-07 00:58:53,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:58:53,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:53,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:53,737 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:53,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-07 00:58:53,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:58:53,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:58:53,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 00:58:53,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-07 00:58:53,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-12-07 00:58:54,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:54,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986523254] [2021-12-07 00:58:54,003 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:54,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929630809] [2021-12-07 00:58:54,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929630809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:54,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:58:54,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-12-07 00:58:54,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102879101] [2021-12-07 00:58:54,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:54,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-07 00:58:54,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:54,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-07 00:58:54,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:58:54,004 INFO L87 Difference]: Start difference. First operand 291 states and 404 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 00:58:54,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:54,505 INFO L93 Difference]: Finished difference Result 362 states and 501 transitions. [2021-12-07 00:58:54,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-07 00:58:54,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 95 [2021-12-07 00:58:54,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:54,508 INFO L225 Difference]: With dead ends: 362 [2021-12-07 00:58:54,509 INFO L226 Difference]: Without dead ends: 357 [2021-12-07 00:58:54,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-12-07 00:58:54,510 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 61 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:54,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 462 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:58:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-12-07 00:58:54,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 277. [2021-12-07 00:58:54,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 161 states have (on average 1.1925465838509317) internal successors, (192), 161 states have internal predecessors, (192), 97 states have call successors, (97), 19 states have call predecessors, (97), 18 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2021-12-07 00:58:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 385 transitions. [2021-12-07 00:58:54,576 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 385 transitions. Word has length 95 [2021-12-07 00:58:54,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:54,577 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 385 transitions. [2021-12-07 00:58:54,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-07 00:58:54,577 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 385 transitions. [2021-12-07 00:58:54,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-07 00:58:54,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:54,578 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:58:54,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-07 00:58:54,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-07 00:58:54,779 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:54,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:54,779 INFO L85 PathProgramCache]: Analyzing trace with hash 28846429, now seen corresponding path program 2 times [2021-12-07 00:58:54,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:58:54,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643184794] [2021-12-07 00:58:54,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:54,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:58:54,786 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:58:54,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1977041024] [2021-12-07 00:58:54,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:58:54,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:58:54,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:58:54,787 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:58:54,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-07 00:58:54,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:58:54,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:58:54,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 84 conjunts are in the unsatisfiable core [2021-12-07 00:58:54,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 84 proven. 52 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-12-07 00:58:55,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 93 proven. 41 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-12-07 00:58:58,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:58:58,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643184794] [2021-12-07 00:58:58,810 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:58:58,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977041024] [2021-12-07 00:58:58,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977041024] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:58,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:58:58,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2021-12-07 00:58:58,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820410469] [2021-12-07 00:58:58,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:58,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-07 00:58:58,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:58:58,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-07 00:58:58,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-12-07 00:58:58,811 INFO L87 Difference]: Start difference. First operand 277 states and 385 transitions. Second operand has 28 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 12 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-12-07 00:59:08,538 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:59:13,067 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:59:16,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:59:19,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:59:33,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:59:35,617 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:59:37,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:59:39,755 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:59:45,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:59:47,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:59:49,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:59:56,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 00:59:58,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:00:07,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:00:09,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:00:12,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:00:14,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:00:18,485 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:00:21,307 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:00:23,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:00:29,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:00:32,386 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:00:34,393 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:00:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:34,655 INFO L93 Difference]: Finished difference Result 479 states and 678 transitions. [2021-12-07 01:00:34,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-07 01:00:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 12 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) Word has length 109 [2021-12-07 01:00:34,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:34,659 INFO L225 Difference]: With dead ends: 479 [2021-12-07 01:00:34,659 INFO L226 Difference]: Without dead ends: 473 [2021-12-07 01:00:34,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=1088, Invalid=5392, Unknown=0, NotChecked=0, Total=6480 [2021-12-07 01:00:34,661 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 183 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 2577 mSolverCounterSat, 462 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 3056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2577 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:34,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 1217 Invalid, 3056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2577 Invalid, 17 Unknown, 0 Unchecked, 72.2s Time] [2021-12-07 01:00:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-12-07 01:00:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 364. [2021-12-07 01:00:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 208 states have (on average 1.2115384615384615) internal successors, (252), 208 states have internal predecessors, (252), 133 states have call successors, (133), 23 states have call predecessors, (133), 22 states have return successors, (132), 132 states have call predecessors, (132), 132 states have call successors, (132) [2021-12-07 01:00:34,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 517 transitions. [2021-12-07 01:00:34,781 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 517 transitions. Word has length 109 [2021-12-07 01:00:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:34,781 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 517 transitions. [2021-12-07 01:00:34,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 12 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-12-07 01:00:34,782 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 517 transitions. [2021-12-07 01:00:34,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-07 01:00:34,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:34,783 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:00:34,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-07 01:00:34,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-07 01:00:34,986 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:34,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:34,987 INFO L85 PathProgramCache]: Analyzing trace with hash -876975624, now seen corresponding path program 3 times [2021-12-07 01:00:34,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:34,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789969782] [2021-12-07 01:00:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:34,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:35,012 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:00:35,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852460102] [2021-12-07 01:00:35,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:00:35,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:35,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:35,016 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:35,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-07 01:00:35,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-07 01:00:35,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:00:35,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-07 01:00:35,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 73 proven. 49 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-12-07 01:00:35,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:00:37,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:37,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789969782] [2021-12-07 01:00:37,235 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:00:37,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852460102] [2021-12-07 01:00:37,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852460102] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:37,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:00:37,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-12-07 01:00:37,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208310480] [2021-12-07 01:00:37,236 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:00:37,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-07 01:00:37,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:37,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-07 01:00:37,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-12-07 01:00:37,237 INFO L87 Difference]: Start difference. First operand 364 states and 517 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-07 01:00:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:39,367 INFO L93 Difference]: Finished difference Result 453 states and 629 transitions. [2021-12-07 01:00:39,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-07 01:00:39,368 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 112 [2021-12-07 01:00:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:39,371 INFO L225 Difference]: With dead ends: 453 [2021-12-07 01:00:39,371 INFO L226 Difference]: Without dead ends: 448 [2021-12-07 01:00:39,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-12-07 01:00:39,372 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 77 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:39,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 691 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-07 01:00:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-12-07 01:00:39,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 375. [2021-12-07 01:00:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 217 states have (on average 1.2027649769585254) internal successors, (261), 217 states have internal predecessors, (261), 133 states have call successors, (133), 25 states have call predecessors, (133), 24 states have return successors, (132), 132 states have call predecessors, (132), 132 states have call successors, (132) [2021-12-07 01:00:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 526 transitions. [2021-12-07 01:00:39,490 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 526 transitions. Word has length 112 [2021-12-07 01:00:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:39,490 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 526 transitions. [2021-12-07 01:00:39,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-12-07 01:00:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 526 transitions. [2021-12-07 01:00:39,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-07 01:00:39,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:39,492 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 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, 1] [2021-12-07 01:00:39,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-07 01:00:39,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:39,693 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:39,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:39,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1746474790, now seen corresponding path program 4 times [2021-12-07 01:00:39,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:39,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844712694] [2021-12-07 01:00:39,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:39,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:39,701 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:00:39,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113898862] [2021-12-07 01:00:39,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:00:39,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:39,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:39,702 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:39,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-07 01:00:39,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:00:39,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:00:39,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-07 01:00:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 75 proven. 84 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-12-07 01:00:41,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:00:45,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:45,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844712694] [2021-12-07 01:00:45,138 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:00:45,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113898862] [2021-12-07 01:00:45,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113898862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:45,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:00:45,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-07 01:00:45,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998505823] [2021-12-07 01:00:45,139 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:00:45,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:00:45,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:45,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:00:45,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-12-07 01:00:45,140 INFO L87 Difference]: Start difference. First operand 375 states and 526 transitions. Second operand has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-07 01:00:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:48,527 INFO L93 Difference]: Finished difference Result 525 states and 746 transitions. [2021-12-07 01:00:48,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:00:48,528 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 117 [2021-12-07 01:00:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:48,531 INFO L225 Difference]: With dead ends: 525 [2021-12-07 01:00:48,531 INFO L226 Difference]: Without dead ends: 520 [2021-12-07 01:00:48,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-12-07 01:00:48,532 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 91 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:48,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 793 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1280 Invalid, 0 Unknown, 20 Unchecked, 1.9s Time] [2021-12-07 01:00:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-12-07 01:00:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 395. [2021-12-07 01:00:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 229 states have (on average 1.2008733624454149) internal successors, (275), 229 states have internal predecessors, (275), 141 states have call successors, (141), 25 states have call predecessors, (141), 24 states have return successors, (140), 140 states have call predecessors, (140), 140 states have call successors, (140) [2021-12-07 01:00:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 556 transitions. [2021-12-07 01:00:48,670 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 556 transitions. Word has length 117 [2021-12-07 01:00:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:48,671 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 556 transitions. [2021-12-07 01:00:48,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2021-12-07 01:00:48,671 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 556 transitions. [2021-12-07 01:00:48,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-07 01:00:48,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:48,674 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:00:48,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-07 01:00:48,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:48,876 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:48,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:48,877 INFO L85 PathProgramCache]: Analyzing trace with hash -693232369, now seen corresponding path program 5 times [2021-12-07 01:00:48,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:00:48,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134777224] [2021-12-07 01:00:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:00:48,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:00:48,903 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:00:48,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399897124] [2021-12-07 01:00:48,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:00:48,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:00:48,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:00:48,906 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:00:48,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-07 01:00:49,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-07 01:00:49,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:00:49,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 83 conjunts are in the unsatisfiable core [2021-12-07 01:00:49,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 58 proven. 75 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-07 01:00:51,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:00:58,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:00:58,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134777224] [2021-12-07 01:00:58,557 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:00:58,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399897124] [2021-12-07 01:00:58,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399897124] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:00:58,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:00:58,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-12-07 01:00:58,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323896109] [2021-12-07 01:00:58,558 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:00:58,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-07 01:00:58,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:00:58,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-07 01:00:58,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 01:00:58,559 INFO L87 Difference]: Start difference. First operand 395 states and 556 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-07 01:01:01,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:01,619 INFO L93 Difference]: Finished difference Result 570 states and 812 transitions. [2021-12-07 01:01:01,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-07 01:01:01,620 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 134 [2021-12-07 01:01:01,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:01,623 INFO L225 Difference]: With dead ends: 570 [2021-12-07 01:01:01,623 INFO L226 Difference]: Without dead ends: 565 [2021-12-07 01:01:01,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2021-12-07 01:01:01,624 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 89 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:01,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 917 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-07 01:01:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-12-07 01:01:01,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 539. [2021-12-07 01:01:01,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 304 states have (on average 1.2236842105263157) internal successors, (372), 304 states have internal predecessors, (372), 205 states have call successors, (205), 30 states have call predecessors, (205), 29 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2021-12-07 01:01:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 781 transitions. [2021-12-07 01:01:01,819 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 781 transitions. Word has length 134 [2021-12-07 01:01:01,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:01,819 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 781 transitions. [2021-12-07 01:01:01,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-07 01:01:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 781 transitions. [2021-12-07 01:01:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-07 01:01:01,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:01,821 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:01,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-07 01:01:02,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:02,023 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1814649351, now seen corresponding path program 6 times [2021-12-07 01:01:02,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:02,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323656156] [2021-12-07 01:01:02,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:02,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:02,050 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:01:02,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151597167] [2021-12-07 01:01:02,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:01:02,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:02,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:02,053 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:02,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-07 01:01:03,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-07 01:01:03,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:01:03,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-07 01:01:03,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 143 proven. 82 refuted. 0 times theorem prover too weak. 383 trivial. 0 not checked. [2021-12-07 01:01:11,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:01:17,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:17,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323656156] [2021-12-07 01:01:17,254 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:01:17,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151597167] [2021-12-07 01:01:17,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151597167] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:17,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:01:17,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-12-07 01:01:17,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555866852] [2021-12-07 01:01:17,254 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:01:17,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 01:01:17,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 01:01:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=888, Unknown=0, NotChecked=0, Total=1056 [2021-12-07 01:01:17,255 INFO L87 Difference]: Start difference. First operand 539 states and 781 transitions. Second operand has 24 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 10 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-07 01:01:27,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:27,421 INFO L93 Difference]: Finished difference Result 872 states and 1295 transitions. [2021-12-07 01:01:27,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-07 01:01:27,422 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 10 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) Word has length 139 [2021-12-07 01:01:27,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:27,427 INFO L225 Difference]: With dead ends: 872 [2021-12-07 01:01:27,427 INFO L226 Difference]: Without dead ends: 867 [2021-12-07 01:01:27,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=446, Invalid=2206, Unknown=0, NotChecked=0, Total=2652 [2021-12-07 01:01:27,429 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 120 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:27,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 490 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-07 01:01:27,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-12-07 01:01:27,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 660. [2021-12-07 01:01:27,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 364 states have (on average 1.2362637362637363) internal successors, (450), 365 states have internal predecessors, (450), 259 states have call successors, (259), 37 states have call predecessors, (259), 36 states have return successors, (258), 257 states have call predecessors, (258), 258 states have call successors, (258) [2021-12-07 01:01:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 967 transitions. [2021-12-07 01:01:27,745 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 967 transitions. Word has length 139 [2021-12-07 01:01:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:27,753 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 967 transitions. [2021-12-07 01:01:27,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.227272727272727) internal successors, (49), 20 states have internal predecessors, (49), 10 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-07 01:01:27,753 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 967 transitions. [2021-12-07 01:01:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-07 01:01:27,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:27,755 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:27,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-07 01:01:27,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:27,956 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:27,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1917326542, now seen corresponding path program 7 times [2021-12-07 01:01:27,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:27,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018710695] [2021-12-07 01:01:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:27,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:27,963 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:01:27,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517933868] [2021-12-07 01:01:27,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:01:27,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:27,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:27,964 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:27,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-07 01:01:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:01:28,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-07 01:01:28,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 70 proven. 91 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2021-12-07 01:01:28,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:01:30,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:30,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018710695] [2021-12-07 01:01:30,267 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:01:30,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517933868] [2021-12-07 01:01:30,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517933868] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:01:30,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:01:30,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-12-07 01:01:30,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282914227] [2021-12-07 01:01:30,267 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:01:30,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 01:01:30,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:30,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 01:01:30,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:01:30,268 INFO L87 Difference]: Start difference. First operand 660 states and 967 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-07 01:01:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:01:32,265 INFO L93 Difference]: Finished difference Result 857 states and 1243 transitions. [2021-12-07 01:01:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:01:32,266 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 142 [2021-12-07 01:01:32,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:01:32,271 INFO L225 Difference]: With dead ends: 857 [2021-12-07 01:01:32,271 INFO L226 Difference]: Without dead ends: 852 [2021-12-07 01:01:32,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2021-12-07 01:01:32,272 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 101 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:01:32,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 917 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1550 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-07 01:01:32,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-12-07 01:01:32,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 818. [2021-12-07 01:01:32,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 451 states have (on average 1.2394678492239468) internal successors, (559), 452 states have internal predecessors, (559), 323 states have call successors, (323), 44 states have call predecessors, (323), 43 states have return successors, (322), 321 states have call predecessors, (322), 322 states have call successors, (322) [2021-12-07 01:01:32,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1204 transitions. [2021-12-07 01:01:32,642 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1204 transitions. Word has length 142 [2021-12-07 01:01:32,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:01:32,643 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1204 transitions. [2021-12-07 01:01:32,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-07 01:01:32,643 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1204 transitions. [2021-12-07 01:01:32,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-07 01:01:32,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:01:32,647 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:01:32,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-07 01:01:32,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-07 01:01:32,848 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:01:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:01:32,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1166399926, now seen corresponding path program 8 times [2021-12-07 01:01:32,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:01:32,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001462533] [2021-12-07 01:01:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:01:32,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:01:32,875 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:01:32,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742326581] [2021-12-07 01:01:32,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:01:32,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:01:32,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:01:32,879 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:01:32,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-07 01:01:32,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:01:32,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:01:32,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 91 conjunts are in the unsatisfiable core [2021-12-07 01:01:32,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:01:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 86 proven. 142 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-12-07 01:01:33,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:01:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 97 proven. 129 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2021-12-07 01:01:39,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:01:39,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001462533] [2021-12-07 01:01:39,670 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:01:39,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742326581] [2021-12-07 01:01:39,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742326581] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:01:39,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:01:39,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 34 [2021-12-07 01:01:39,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130511096] [2021-12-07 01:01:39,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:01:39,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-07 01:01:39,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:01:39,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-07 01:01:39,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-12-07 01:01:39,672 INFO L87 Difference]: Start difference. First operand 818 states and 1204 transitions. Second operand has 34 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 17 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 13 states have call predecessors, (44), 15 states have call successors, (44) [2021-12-07 01:02:13,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:02:23,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:02:33,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:02:46,225 WARN L227 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 78 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:02:59,693 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:03:20,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:03:28,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:03:32,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:03:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:03:52,625 INFO L93 Difference]: Finished difference Result 1351 states and 2059 transitions. [2021-12-07 01:03:52,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-07 01:03:52,627 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 17 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 13 states have call predecessors, (44), 15 states have call successors, (44) Word has length 156 [2021-12-07 01:03:52,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:03:52,633 INFO L225 Difference]: With dead ends: 1351 [2021-12-07 01:03:52,633 INFO L226 Difference]: Without dead ends: 1345 [2021-12-07 01:03:52,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4234 ImplicationChecksByTransitivity, 69.9s TimeCoverageRelationStatistics Valid=1854, Invalid=12188, Unknown=0, NotChecked=0, Total=14042 [2021-12-07 01:03:52,638 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 286 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 4405 mSolverCounterSat, 998 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 5406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 998 IncrementalHoareTripleChecker+Valid, 4405 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.7s IncrementalHoareTripleChecker+Time [2021-12-07 01:03:52,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 1855 Invalid, 5406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [998 Valid, 4405 Invalid, 3 Unknown, 0 Unchecked, 67.7s Time] [2021-12-07 01:03:52,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1345 states. [2021-12-07 01:03:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1345 to 1133. [2021-12-07 01:03:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 594 states have (on average 1.2744107744107744) internal successors, (757), 595 states have internal predecessors, (757), 491 states have call successors, (491), 48 states have call predecessors, (491), 47 states have return successors, (490), 489 states have call predecessors, (490), 490 states have call successors, (490) [2021-12-07 01:03:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 1738 transitions. [2021-12-07 01:03:53,281 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 1738 transitions. Word has length 156 [2021-12-07 01:03:53,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:03:53,282 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 1738 transitions. [2021-12-07 01:03:53,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 17 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 13 states have call predecessors, (44), 15 states have call successors, (44) [2021-12-07 01:03:53,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 1738 transitions. [2021-12-07 01:03:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-07 01:03:53,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:03:53,286 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:03:53,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-07 01:03:53,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-07 01:03:53,487 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:03:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:03:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash 627809211, now seen corresponding path program 9 times [2021-12-07 01:03:53,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:03:53,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142348612] [2021-12-07 01:03:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:03:53,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:03:53,523 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:03:53,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536711050] [2021-12-07 01:03:53,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:03:53,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:03:53,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:03:53,526 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:03:53,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-07 01:03:53,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-07 01:03:53,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:03:53,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-07 01:03:53,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:03:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 109 proven. 35 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2021-12-07 01:03:54,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:03:54,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:03:54,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142348612] [2021-12-07 01:03:54,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:03:54,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536711050] [2021-12-07 01:03:54,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536711050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:03:54,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:03:54,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-07 01:03:54,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434150941] [2021-12-07 01:03:54,564 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:03:54,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:03:54,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:03:54,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:03:54,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-07 01:03:54,565 INFO L87 Difference]: Start difference. First operand 1133 states and 1738 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-07 01:03:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:03:55,713 INFO L93 Difference]: Finished difference Result 1364 states and 2078 transitions. [2021-12-07 01:03:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-07 01:03:55,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 159 [2021-12-07 01:03:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:03:55,723 INFO L225 Difference]: With dead ends: 1364 [2021-12-07 01:03:55,723 INFO L226 Difference]: Without dead ends: 1359 [2021-12-07 01:03:55,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-12-07 01:03:55,724 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 52 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:03:55,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 317 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:03:55,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-12-07 01:03:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1108. [2021-12-07 01:03:56,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 592 states have (on average 1.2618243243243243) internal successors, (747), 593 states have internal predecessors, (747), 463 states have call successors, (463), 53 states have call predecessors, (463), 52 states have return successors, (462), 461 states have call predecessors, (462), 462 states have call successors, (462) [2021-12-07 01:03:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1672 transitions. [2021-12-07 01:03:56,360 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1672 transitions. Word has length 159 [2021-12-07 01:03:56,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:03:56,361 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 1672 transitions. [2021-12-07 01:03:56,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-07 01:03:56,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1672 transitions. [2021-12-07 01:03:56,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-07 01:03:56,364 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:03:56,364 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:03:56,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-07 01:03:56,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-07 01:03:56,565 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:03:56,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:03:56,566 INFO L85 PathProgramCache]: Analyzing trace with hash 314529541, now seen corresponding path program 10 times [2021-12-07 01:03:56,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:03:56,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694647808] [2021-12-07 01:03:56,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:03:56,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:03:56,586 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:03:56,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356627777] [2021-12-07 01:03:56,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-07 01:03:56,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:03:56,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:03:56,590 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:03:56,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-07 01:03:56,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-07 01:03:56,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:03:56,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-07 01:03:56,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:03:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 187 proven. 195 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-12-07 01:03:58,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:04:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 914 backedges. 220 proven. 12 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2021-12-07 01:04:00,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:00,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694647808] [2021-12-07 01:04:00,466 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:04:00,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356627777] [2021-12-07 01:04:00,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356627777] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:04:00,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:04:00,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13] total 30 [2021-12-07 01:04:00,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791272329] [2021-12-07 01:04:00,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:04:00,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-07 01:04:00,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:00,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-07 01:04:00,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-12-07 01:04:00,467 INFO L87 Difference]: Start difference. First operand 1108 states and 1672 transitions. Second operand has 30 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 states have internal predecessors, (69), 13 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) [2021-12-07 01:04:04,092 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:04:18,294 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:04:20,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:04:20,479 INFO L93 Difference]: Finished difference Result 1442 states and 2136 transitions. [2021-12-07 01:04:20,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-07 01:04:20,481 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 states have internal predecessors, (69), 13 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) Word has length 159 [2021-12-07 01:04:20,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:04:20,487 INFO L225 Difference]: With dead ends: 1442 [2021-12-07 01:04:20,487 INFO L226 Difference]: Without dead ends: 1272 [2021-12-07 01:04:20,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 284 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=541, Invalid=2881, Unknown=0, NotChecked=0, Total=3422 [2021-12-07 01:04:20,489 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 203 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 620 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2021-12-07 01:04:20,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 730 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 1834 Invalid, 2 Unknown, 0 Unchecked, 13.6s Time] [2021-12-07 01:04:20,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-12-07 01:04:20,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 940. [2021-12-07 01:04:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 525 states have (on average 1.2285714285714286) internal successors, (645), 526 states have internal predecessors, (645), 359 states have call successors, (359), 56 states have call predecessors, (359), 55 states have return successors, (358), 357 states have call predecessors, (358), 358 states have call successors, (358) [2021-12-07 01:04:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1362 transitions. [2021-12-07 01:04:20,981 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1362 transitions. Word has length 159 [2021-12-07 01:04:20,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:04:20,981 INFO L470 AbstractCegarLoop]: Abstraction has 940 states and 1362 transitions. [2021-12-07 01:04:20,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 27 states have internal predecessors, (69), 13 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 11 states have call successors, (32) [2021-12-07 01:04:20,981 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1362 transitions. [2021-12-07 01:04:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-07 01:04:20,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:04:20,984 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:04:21,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-07 01:04:21,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-07 01:04:21,185 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:04:21,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:04:21,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1056777896, now seen corresponding path program 11 times [2021-12-07 01:04:21,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:04:21,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331544382] [2021-12-07 01:04:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:04:21,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:04:21,191 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:04:21,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785550696] [2021-12-07 01:04:21,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-07 01:04:21,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:04:21,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:04:21,192 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:04:21,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-07 01:04:21,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-07 01:04:21,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:04:21,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 105 conjunts are in the unsatisfiable core [2021-12-07 01:04:21,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:04:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 66 proven. 127 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2021-12-07 01:04:22,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:04:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 66 proven. 127 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2021-12-07 01:04:34,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:04:34,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331544382] [2021-12-07 01:04:34,088 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:04:34,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785550696] [2021-12-07 01:04:34,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785550696] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:04:34,089 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:04:34,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 40 [2021-12-07 01:04:34,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552274754] [2021-12-07 01:04:34,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:04:34,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-07 01:04:34,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:04:34,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-07 01:04:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2021-12-07 01:04:34,090 INFO L87 Difference]: Start difference. First operand 940 states and 1362 transitions. Second operand has 40 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 14 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 12 states have call predecessors, (44), 12 states have call successors, (44) [2021-12-07 01:05:01,722 WARN L227 SmtUtils]: Spent 10.45s on a formula simplification that was a NOOP. DAG size: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:05:03,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:05:18,611 WARN L227 SmtUtils]: Spent 12.07s on a formula simplification that was a NOOP. DAG size: 118 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:05:31,957 WARN L227 SmtUtils]: Spent 10.83s on a formula simplification that was a NOOP. DAG size: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:05:34,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:05:39,222 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:05:41,224 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:05:43,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:05:46,734 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:05:49,587 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:05:55,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:05:56,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:05:58,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:06:00,544 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:06:22,186 WARN L227 SmtUtils]: Spent 14.27s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:06:27,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:06:41,505 WARN L227 SmtUtils]: Spent 9.48s on a formula simplification that was a NOOP. DAG size: 129 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:06:47,554 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:06:48,972 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:06:50,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:06:53,379 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:06:59,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:07:10,982 WARN L227 SmtUtils]: Spent 9.16s on a formula simplification that was a NOOP. DAG size: 106 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:07:24,233 WARN L227 SmtUtils]: Spent 10.70s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:07:27,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:07:35,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:07:38,254 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:07:40,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:07:50,604 WARN L227 SmtUtils]: Spent 8.60s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:07:53,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:08:06,406 WARN L227 SmtUtils]: Spent 8.79s on a formula simplification that was a NOOP. DAG size: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:08:08,703 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:08:16,099 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:08:25,598 WARN L227 SmtUtils]: Spent 7.96s on a formula simplification that was a NOOP. DAG size: 108 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:08:27,935 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:08:34,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:08:36,567 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:08:38,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:08:42,222 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:08:54,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:08:56,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:08:59,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:09:01,385 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:09:15,988 WARN L227 SmtUtils]: Spent 7.81s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:09:27,008 WARN L227 SmtUtils]: Spent 9.31s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:09:29,753 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:09:33,226 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:09:34,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:09:36,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:09:39,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:09:46,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:09:56,656 WARN L227 SmtUtils]: Spent 8.52s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:10:18,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:10:19,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:10:21,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:10:23,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:10:32,114 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:10:46,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:10:47,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:10:48,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:10:50,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:10:52,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-07 01:10:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:53,481 INFO L93 Difference]: Finished difference Result 1619 states and 2450 transitions. [2021-12-07 01:10:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-12-07 01:10:53,482 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 14 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 12 states have call predecessors, (44), 12 states have call successors, (44) Word has length 161 [2021-12-07 01:10:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:53,490 INFO L225 Difference]: With dead ends: 1619 [2021-12-07 01:10:53,490 INFO L226 Difference]: Without dead ends: 1612 [2021-12-07 01:10:53,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5739 ImplicationChecksByTransitivity, 253.9s TimeCoverageRelationStatistics Valid=3600, Invalid=14758, Unknown=2, NotChecked=0, Total=18360 [2021-12-07 01:10:53,494 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 445 mSDsluCounter, 1631 mSDsCounter, 0 mSdLazyCounter, 4451 mSolverCounterSat, 1300 mSolverCounterUnsat, 30 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 5781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1300 IncrementalHoareTripleChecker+Valid, 4451 IncrementalHoareTripleChecker+Invalid, 30 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 133.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:53,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 1719 Invalid, 5781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1300 Valid, 4451 Invalid, 30 Unknown, 0 Unchecked, 133.4s Time] [2021-12-07 01:10:53,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-12-07 01:10:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1068. [2021-12-07 01:10:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 574 states have (on average 1.2439024390243902) internal successors, (714), 576 states have internal predecessors, (714), 435 states have call successors, (435), 59 states have call predecessors, (435), 58 states have return successors, (434), 432 states have call predecessors, (434), 434 states have call successors, (434) [2021-12-07 01:10:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1583 transitions. [2021-12-07 01:10:54,320 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1583 transitions. Word has length 161 [2021-12-07 01:10:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:54,321 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1583 transitions. [2021-12-07 01:10:54,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 14 states have call successors, (46), 2 states have call predecessors, (46), 2 states have return successors, (44), 12 states have call predecessors, (44), 12 states have call successors, (44) [2021-12-07 01:10:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1583 transitions. [2021-12-07 01:10:54,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-12-07 01:10:54,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:54,323 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:54,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-07 01:10:54,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:54,524 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:10:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:54,525 INFO L85 PathProgramCache]: Analyzing trace with hash -873976337, now seen corresponding path program 12 times [2021-12-07 01:10:54,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:54,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836530650] [2021-12-07 01:10:54,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:54,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:54,548 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:54,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042225446] [2021-12-07 01:10:54,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-07 01:10:54,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:54,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:54,549 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:54,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-07 01:10:55,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-12-07 01:10:55,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:10:55,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-07 01:10:55,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:10:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 90 proven. 39 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2021-12-07 01:10:55,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:10:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 90 proven. 39 refuted. 0 times theorem prover too weak. 803 trivial. 0 not checked. [2021-12-07 01:10:55,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:10:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836530650] [2021-12-07 01:10:55,752 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:10:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042225446] [2021-12-07 01:10:55,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042225446] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:10:55,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:10:55,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-12-07 01:10:55,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941444888] [2021-12-07 01:10:55,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:10:55,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:10:55,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:10:55,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:10:55,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-12-07 01:10:55,753 INFO L87 Difference]: Start difference. First operand 1068 states and 1583 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2021-12-07 01:10:57,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:10:57,142 INFO L93 Difference]: Finished difference Result 1660 states and 2479 transitions. [2021-12-07 01:10:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 01:10:57,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) Word has length 164 [2021-12-07 01:10:57,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:10:57,148 INFO L225 Difference]: With dead ends: 1660 [2021-12-07 01:10:57,148 INFO L226 Difference]: Without dead ends: 1178 [2021-12-07 01:10:57,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 312 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:10:57,150 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 18 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:10:57,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 417 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:10:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-12-07 01:10:58,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1105. [2021-12-07 01:10:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 605 states have (on average 1.234710743801653) internal successors, (747), 625 states have internal predecessors, (747), 444 states have call successors, (444), 56 states have call predecessors, (444), 55 states have return successors, (443), 423 states have call predecessors, (443), 443 states have call successors, (443) [2021-12-07 01:10:58,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1634 transitions. [2021-12-07 01:10:58,044 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1634 transitions. Word has length 164 [2021-12-07 01:10:58,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:10:58,044 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 1634 transitions. [2021-12-07 01:10:58,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 6 states have call predecessors, (28), 6 states have call successors, (28) [2021-12-07 01:10:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1634 transitions. [2021-12-07 01:10:58,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-07 01:10:58,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:10:58,047 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:10:58,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-07 01:10:58,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:58,248 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:10:58,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:10:58,249 INFO L85 PathProgramCache]: Analyzing trace with hash 283960494, now seen corresponding path program 13 times [2021-12-07 01:10:58,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:10:58,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107802377] [2021-12-07 01:10:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:10:58,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:10:58,279 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:10:58,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530052271] [2021-12-07 01:10:58,279 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-07 01:10:58,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:10:58,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:10:58,280 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:10:58,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-07 01:10:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:10:58,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 126 conjunts are in the unsatisfiable core [2021-12-07 01:10:58,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:01,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1314 backedges. 266 proven. 169 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2021-12-07 01:11:01,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:11:04,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:11:04,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107802377] [2021-12-07 01:11:04,975 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:11:04,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530052271] [2021-12-07 01:11:04,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530052271] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:11:04,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:11:04,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-12-07 01:11:04,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936181274] [2021-12-07 01:11:04,976 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:11:04,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-07 01:11:04,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:11:04,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-07 01:11:04,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2021-12-07 01:11:04,977 INFO L87 Difference]: Start difference. First operand 1105 states and 1634 transitions. Second operand has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2021-12-07 01:11:10,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:11:10,436 INFO L93 Difference]: Finished difference Result 1270 states and 1865 transitions. [2021-12-07 01:11:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-07 01:11:10,437 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 186 [2021-12-07 01:11:10,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:11:10,443 INFO L225 Difference]: With dead ends: 1270 [2021-12-07 01:11:10,443 INFO L226 Difference]: Without dead ends: 1265 [2021-12-07 01:11:10,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=308, Invalid=2448, Unknown=0, NotChecked=0, Total=2756 [2021-12-07 01:11:10,444 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 123 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 2711 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 2882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:11:10,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 1448 Invalid, 2882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2711 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-07 01:11:10,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2021-12-07 01:11:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1219. [2021-12-07 01:11:11,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 666 states have (on average 1.2357357357357357) internal successors, (823), 689 states have internal predecessors, (823), 491 states have call successors, (491), 62 states have call predecessors, (491), 61 states have return successors, (490), 467 states have call predecessors, (490), 490 states have call successors, (490) [2021-12-07 01:11:11,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 1804 transitions. [2021-12-07 01:11:11,416 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 1804 transitions. Word has length 186 [2021-12-07 01:11:11,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:11:11,417 INFO L470 AbstractCegarLoop]: Abstraction has 1219 states and 1804 transitions. [2021-12-07 01:11:11,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2021-12-07 01:11:11,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 1804 transitions. [2021-12-07 01:11:11,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-12-07 01:11:11,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:11:11,420 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:11:11,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-07 01:11:11,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-07 01:11:11,621 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:11:11,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:11:11,622 INFO L85 PathProgramCache]: Analyzing trace with hash -980225947, now seen corresponding path program 14 times [2021-12-07 01:11:11,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:11:11,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670935279] [2021-12-07 01:11:11,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:11:11,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:11:11,639 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 01:11:11,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361419338] [2021-12-07 01:11:11,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:11:11,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:11:11,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:11:11,640 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:11:11,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_959702d6-ae56-4cdb-8438-e7be10bb7455/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-07 01:11:11,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:11:11,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:11:11,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 122 conjunts are in the unsatisfiable core [2021-12-07 01:11:11,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:11:32,541 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse13 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse14 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (and (let ((.cse1 (= (mod |c_ULTIMATE.start_main_~q~0#1| (- 2)) 0)) (.cse16 (div (* |c_ULTIMATE.start_main_~q~0#1| (- 1)) (- 2))) (.cse3 (* 2 |c_ULTIMATE.start_main_~y~0#1|)) (.cse15 (div (* |c_ULTIMATE.start_main_~r~0#1| (- 1)) 2)) (.cse0 (= |c_ULTIMATE.start_main_~p~0#1| 0))) (or (let ((.cse12 (div .cse16 |c_ULTIMATE.start_main_~p~0#1|))) (let ((.cse2 (* 2 (* |c_ULTIMATE.start_main_~y~0#1| (div .cse15 (+ (* (- 2) |c_ULTIMATE.start_main_~r~0#1| .cse12) |c_ULTIMATE.start_main_~s~0#1|)))))) (and (not .cse0) .cse1 (= (mod (div (- |c_ULTIMATE.start_main_~q~0#1|) (- 2)) |c_ULTIMATE.start_main_~p~0#1|) 0) (= .cse2 .cse3) (exists ((|aux_div_aux_mod_ULTIMATE.start_main_~d~0#1_79_47| Int) (|aux_div_aux_div_ULTIMATE.start_main_~d~0#1_79_47| Int)) (let ((.cse10 (* 2 |aux_div_aux_mod_ULTIMATE.start_main_~d~0#1_79_47|)) (.cse6 (* 4 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1| |aux_div_aux_div_ULTIMATE.start_main_~d~0#1_79_47|))) (.cse7 (* 2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1| |aux_div_aux_mod_ULTIMATE.start_main_~d~0#1_79_47|))) (.cse4 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse8 (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1| |aux_div_aux_mod_ULTIMATE.start_main_~d~0#1_79_47|))) (.cse9 (* 4 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1| |aux_div_aux_div_ULTIMATE.start_main_~d~0#1_79_47|)))) (and (= (+ (* 4 .cse4) (* 4 .cse5)) (+ .cse6 .cse7 .cse8 .cse9)) (< .cse10 2) (<= 0 .cse10) (= (let ((.cse11 (div (div (* |c_ULTIMATE.start_main_~q~0#1| (- 1)) (- 2)) |c_ULTIMATE.start_main_~p~0#1|))) (+ .cse6 (* 2 (* |c_ULTIMATE.start_main_~x~0#1| .cse11 |c_ULTIMATE.start_main_~p~0#1|)) .cse7 (* 2 .cse4) (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1| .cse11)) (* 2 .cse5) .cse8 .cse9)) 0)))) (= |c_ULTIMATE.start_main_~s~0#1| (+ (* 2 (* |c_ULTIMATE.start_main_~r~0#1| .cse12)) 1)) (= (+ .cse2 .cse13 .cse14) |c_ULTIMATE.start_main_~x~0#1|)))) (and .cse1 (= .cse16 0) (let ((.cse18 (= |c_ULTIMATE.start_main_~r~0#1| 0)) (.cse19 (= (mod (+ |c_ULTIMATE.start_main_~s~0#1| 1) 2) 0)) (.cse20 (div (+ (- 1) |c_ULTIMATE.start_main_~s~0#1|) 2))) (or (and (exists ((|aux_div_ULTIMATE.start_main_~k~0#1_40| Int)) (let ((.cse17 (* 2 (* |c_ULTIMATE.start_main_~y~0#1| (div (div (* |c_ULTIMATE.start_main_~r~0#1| (- 1)) 2) (+ |c_ULTIMATE.start_main_~s~0#1| (* (- 2) |c_ULTIMATE.start_main_~r~0#1| |aux_div_ULTIMATE.start_main_~k~0#1_40|))))))) (and (= |c_ULTIMATE.start_main_~x~0#1| (+ (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) .cse17 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (= (* 2 |c_ULTIMATE.start_main_~y~0#1|) .cse17)))) .cse18 .cse19 (= .cse20 0)) (let ((.cse21 (* 2 (* |c_ULTIMATE.start_main_~y~0#1| (div .cse15 (+ |c_ULTIMATE.start_main_~s~0#1| (* (- 2) (div .cse20 |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~r~0#1|))))))) (and (= |c_ULTIMATE.start_main_~x~0#1| (+ .cse13 .cse21 .cse14)) (exists ((|aux_div_aux_mod_ULTIMATE.start_main_~d~0#1_79_47| Int) (|aux_div_aux_div_ULTIMATE.start_main_~d~0#1_79_47| Int)) (let ((.cse28 (* 2 |aux_div_aux_mod_ULTIMATE.start_main_~d~0#1_79_47|)) (.cse24 (* 4 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1| |aux_div_aux_div_ULTIMATE.start_main_~d~0#1_79_47|))) (.cse25 (* 2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1| |aux_div_aux_mod_ULTIMATE.start_main_~d~0#1_79_47|))) (.cse22 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse23 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse26 (* 2 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1| |aux_div_aux_mod_ULTIMATE.start_main_~d~0#1_79_47|))) (.cse27 (* 4 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1| |aux_div_aux_div_ULTIMATE.start_main_~d~0#1_79_47|)))) (and (= (+ (* 4 .cse22) (* 4 .cse23)) (+ .cse24 .cse25 .cse26 .cse27)) (< .cse28 2) (<= 0 .cse28) (= (let ((.cse29 (div (div (+ (- 1) |c_ULTIMATE.start_main_~s~0#1|) 2) |c_ULTIMATE.start_main_~r~0#1|))) (+ (* 2 (* |c_ULTIMATE.start_main_~y~0#1| .cse29 |c_ULTIMATE.start_main_~r~0#1|)) .cse24 .cse25 (* 2 .cse22) (* 2 .cse23) (* 2 (* .cse29 |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) .cse26 .cse27)) 0)))) (= .cse3 .cse21) (= (mod .cse20 |c_ULTIMATE.start_main_~r~0#1|) 0) (not .cse18) .cse19)))) .cse0))) (= |c_ULTIMATE.start_main_~y~0#1| (+ |c_ULTIMATE.start_main_~b~0#1| (* 6 .cse14) (* 6 .cse13))) (= (mod |c_ULTIMATE.start_main_~r~0#1| 2) 0) (= |c_ULTIMATE.start_main_~a~0#1| (+ .cse13 .cse14)))) is different from false [2021-12-07 01:12:34,662 WARN L227 SmtUtils]: Spent 37.29s on a formula simplification. DAG size of input: 113 DAG size of output: 113 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-07 01:13:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1748 backedges. 373 proven. 276 refuted. 0 times theorem prover too weak. 1095 trivial. 4 not checked. [2021-12-07 01:13:05,069 INFO L328 TraceCheckSpWp]: Computing backward predicates...