./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0 --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 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:38:50,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:38:50,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:38:50,259 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:38:50,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:38:50,261 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:38:50,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:38:50,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:38:50,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:38:50,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:38:50,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:38:50,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:38:50,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:38:50,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:38:50,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:38:50,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:38:50,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:38:50,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:38:50,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:38:50,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:38:50,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:38:50,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:38:50,288 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:38:50,289 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:38:50,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:38:50,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:38:50,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:38:50,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:38:50,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:38:50,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:38:50,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:38:50,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:38:50,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:38:50,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:38:50,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:38:50,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:38:50,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:38:50,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:38:50,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:38:50,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:38:50,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:38:50,306 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:38:50,330 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:38:50,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:38:50,331 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:38:50,332 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:38:50,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:38:50,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:38:50,334 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:38:50,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:38:50,334 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:38:50,335 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:38:50,335 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:38:50,336 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:38:50,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:38:50,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:38:50,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:38:50,337 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:38:50,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:38:50,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:38:50,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:38:50,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:38:50,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:38:50,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:38:50,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:38:50,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:38:50,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:38:50,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:38:50,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:38:50,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:38:50,341 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:38:50,341 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:38:50,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:38:50,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:38:50,342 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_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 [2021-11-22 14:38:50,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:38:50,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:38:50,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:38:50,625 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:38:50,626 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:38:50,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-crafted/zero_sum1.c [2021-11-22 14:38:50,706 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/data/3cf45b94d/b5c676bdaaa64e59a91bb9fe9a34deb7/FLAGd5e072129 [2021-11-22 14:38:51,197 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:38:51,197 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/sv-benchmarks/c/array-crafted/zero_sum1.c [2021-11-22 14:38:51,203 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/data/3cf45b94d/b5c676bdaaa64e59a91bb9fe9a34deb7/FLAGd5e072129 [2021-11-22 14:38:51,614 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/data/3cf45b94d/b5c676bdaaa64e59a91bb9fe9a34deb7 [2021-11-22 14:38:51,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:38:51,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:38:51,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:38:51,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:38:51,635 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:38:51,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:38:51" (1/1) ... [2021-11-22 14:38:51,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@129ab3b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:38:51, skipping insertion in model container [2021-11-22 14:38:51,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:38:51" (1/1) ... [2021-11-22 14:38:51,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:38:51,657 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:38:51,812 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_fc40fd2c-a996-4022-949f-01cbeadc9d25/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2021-11-22 14:38:51,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:38:51,845 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:38:51,860 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_fc40fd2c-a996-4022-949f-01cbeadc9d25/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2021-11-22 14:38:51,873 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:38:51,895 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:38:51,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:38:51 WrapperNode [2021-11-22 14:38:51,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:38:51,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:38:51,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:38:51,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:38:51,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:38:51" (1/1) ... [2021-11-22 14:38:51,914 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:38:51" (1/1) ... [2021-11-22 14:38:51,938 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2021-11-22 14:38:51,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:38:51,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:38:51,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:38:51,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:38:51,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:38:51" (1/1) ... [2021-11-22 14:38:51,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:38:51" (1/1) ... [2021-11-22 14:38:51,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:38:51" (1/1) ... [2021-11-22 14:38:51,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:38:51" (1/1) ... [2021-11-22 14:38:51,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:38:51" (1/1) ... [2021-11-22 14:38:51,981 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:38:51" (1/1) ... [2021-11-22 14:38:51,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:38:51" (1/1) ... [2021-11-22 14:38:51,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:38:51,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:38:51,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:38:51,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:38:51,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:38:51" (1/1) ... [2021-11-22 14:38:52,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:38:52,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:38:52,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:38:52,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:38:52,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:38:52,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:38:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 14:38:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 14:38:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:38:52,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:38:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 14:38:52,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 14:38:52,145 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:38:52,147 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:38:52,250 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:38:52,256 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:38:52,257 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 14:38:52,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:38:52 BoogieIcfgContainer [2021-11-22 14:38:52,259 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:38:52,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:38:52,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:38:52,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:38:52,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:38:51" (1/3) ... [2021-11-22 14:38:52,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a4c7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:38:52, skipping insertion in model container [2021-11-22 14:38:52,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:38:51" (2/3) ... [2021-11-22 14:38:52,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a4c7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:38:52, skipping insertion in model container [2021-11-22 14:38:52,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:38:52" (3/3) ... [2021-11-22 14:38:52,267 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum1.c [2021-11-22 14:38:52,272 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:38:52,272 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:38:52,320 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:38:52,328 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 [2021-11-22 14:38:52,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:38:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:52,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 14:38:52,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:38:52,348 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:38:52,349 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:38:52,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:38:52,354 INFO L85 PathProgramCache]: Analyzing trace with hash -718163050, now seen corresponding path program 1 times [2021-11-22 14:38:52,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:38:52,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016839091] [2021-11-22 14:38:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:38:52,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:38:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:38:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:38:52,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:38:52,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016839091] [2021-11-22 14:38:52,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016839091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:38:52,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:38:52,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-22 14:38:52,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424019023] [2021-11-22 14:38:52,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:38:52,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:38:52,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:38:52,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:38:52,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:38:52,543 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:52,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:38:52,560 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-22 14:38:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:38:52,562 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 14:38:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:38:52,571 INFO L225 Difference]: With dead ends: 35 [2021-11-22 14:38:52,571 INFO L226 Difference]: Without dead ends: 15 [2021-11-22 14:38:52,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:38:52,579 INFO L933 BasicCegarLoop]: 23 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, 23 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 [2021-11-22 14:38:52,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:38:52,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-22 14:38:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-22 14:38:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:52,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-22 14:38:52,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-22 14:38:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:38:52,612 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-22 14:38:52,612 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-22 14:38:52,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 14:38:52,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:38:52,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:38:52,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:38:52,614 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:38:52,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:38:52,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1709876828, now seen corresponding path program 1 times [2021-11-22 14:38:52,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:38:52,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939799262] [2021-11-22 14:38:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:38:52,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:38:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:38:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:38:52,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:38:52,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939799262] [2021-11-22 14:38:52,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939799262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:38:52,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:38:52,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-22 14:38:52,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345826749] [2021-11-22 14:38:52,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:38:52,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-22 14:38:52,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:38:52,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-22 14:38:52,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:38:52,696 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:38:52,723 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-11-22 14:38:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-22 14:38:52,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 14:38:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:38:52,725 INFO L225 Difference]: With dead ends: 27 [2021-11-22 14:38:52,725 INFO L226 Difference]: Without dead ends: 17 [2021-11-22 14:38:52,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-22 14:38:52,728 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:38:52,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:38:52,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-22 14:38:52,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-11-22 14:38:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:52,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-22 14:38:52,734 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2021-11-22 14:38:52,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:38:52,734 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-22 14:38:52,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:52,735 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-22 14:38:52,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 14:38:52,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:38:52,736 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:38:52,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:38:52,736 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:38:52,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:38:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2117745282, now seen corresponding path program 1 times [2021-11-22 14:38:52,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:38:52,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883746345] [2021-11-22 14:38:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:38:52,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:38:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:38:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:38:52,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:38:52,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883746345] [2021-11-22 14:38:52,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883746345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:38:52,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:38:52,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:38:52,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982919001] [2021-11-22 14:38:52,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:38:52,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:38:52,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:38:52,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:38:52,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:38:52,809 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:38:52,848 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-11-22 14:38:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:38:52,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-22 14:38:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:38:52,849 INFO L225 Difference]: With dead ends: 27 [2021-11-22 14:38:52,849 INFO L226 Difference]: Without dead ends: 20 [2021-11-22 14:38:52,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:38:52,852 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:38:52,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 13 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:38:52,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-22 14:38:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-11-22 14:38:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-11-22 14:38:52,859 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2021-11-22 14:38:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:38:52,859 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-11-22 14:38:52,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:52,860 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-11-22 14:38:52,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 14:38:52,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:38:52,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:38:52,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 14:38:52,862 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:38:52,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:38:52,863 INFO L85 PathProgramCache]: Analyzing trace with hash -350467326, now seen corresponding path program 1 times [2021-11-22 14:38:52,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:38:52,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778024232] [2021-11-22 14:38:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:38:52,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:38:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:38:52,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:38:52,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:38:52,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778024232] [2021-11-22 14:38:52,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778024232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:38:52,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914121259] [2021-11-22 14:38:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:38:52,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:38:52,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:38:52,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:38:52,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:38:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:38:53,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 14:38:53,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:38:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:38:53,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:38:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-22 14:38:53,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914121259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:38:53,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:38:53,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-22 14:38:53,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316114175] [2021-11-22 14:38:53,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:38:53,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:38:53,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:38:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:38:53,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:38:53,258 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:53,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:38:53,307 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-11-22 14:38:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-22 14:38:53,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 14:38:53,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:38:53,309 INFO L225 Difference]: With dead ends: 33 [2021-11-22 14:38:53,310 INFO L226 Difference]: Without dead ends: 21 [2021-11-22 14:38:53,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:38:53,312 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:38:53,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 29 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:38:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-22 14:38:53,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-11-22 14:38:53,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-11-22 14:38:53,327 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2021-11-22 14:38:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:38:53,337 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-11-22 14:38:53,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:53,337 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-11-22 14:38:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 14:38:53,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:38:53,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:38:53,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:38:53,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:38:53,560 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:38:53,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:38:53,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1584924836, now seen corresponding path program 2 times [2021-11-22 14:38:53,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:38:53,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055413376] [2021-11-22 14:38:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:38:53,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:38:53,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:38:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 14:38:53,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:38:53,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055413376] [2021-11-22 14:38:53,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055413376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:38:53,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516905405] [2021-11-22 14:38:53,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:38:53,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:38:53,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:38:53,694 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:38:53,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:38:53,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:38:53,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:38:53,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 14:38:53,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:38:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 14:38:53,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:38:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-22 14:38:53,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516905405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:38:53,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:38:53,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-22 14:38:53,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362184942] [2021-11-22 14:38:53,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:38:53,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-22 14:38:53,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:38:53,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-22 14:38:53,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-22 14:38:53,942 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:54,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:38:54,022 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-11-22 14:38:54,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:38:54,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-22 14:38:54,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:38:54,025 INFO L225 Difference]: With dead ends: 34 [2021-11-22 14:38:54,025 INFO L226 Difference]: Without dead ends: 26 [2021-11-22 14:38:54,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:38:54,030 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:38:54,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 13 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:38:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-22 14:38:54,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-11-22 14:38:54,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-22 14:38:54,045 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2021-11-22 14:38:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:38:54,046 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-22 14:38:54,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:38:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-22 14:38:54,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 14:38:54,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:38:54,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:38:54,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:38:54,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:38:54,257 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:38:54,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:38:54,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1965660968, now seen corresponding path program 3 times [2021-11-22 14:38:54,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:38:54,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73955421] [2021-11-22 14:38:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:38:54,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:38:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:38:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:38:54,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:38:54,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73955421] [2021-11-22 14:38:54,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73955421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:38:54,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534081812] [2021-11-22 14:38:54,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:38:54,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:38:54,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:38:54,874 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:38:54,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:38:54,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-22 14:38:54,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:38:54,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-22 14:38:54,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:38:55,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 14:38:55,832 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 14:38:55,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-22 14:38:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:38:56,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:38:58,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 81 [2021-11-22 14:38:58,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 14:38:58,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 231 [2021-11-22 14:38:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:38:58,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534081812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:38:58,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:38:58,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 20] total 47 [2021-11-22 14:38:58,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836659376] [2021-11-22 14:38:58,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:38:58,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-22 14:38:58,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:38:58,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-22 14:38:58,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1919, Unknown=0, NotChecked=0, Total=2162 [2021-11-22 14:38:58,668 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:00,314 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-11-22 14:39:00,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-22 14:39:00,315 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-22 14:39:00,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:00,317 INFO L225 Difference]: With dead ends: 64 [2021-11-22 14:39:00,317 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 14:39:00,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=570, Invalid=4542, Unknown=0, NotChecked=0, Total=5112 [2021-11-22 14:39:00,321 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:00,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 79 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 233 Invalid, 0 Unknown, 219 Unchecked, 0.2s Time] [2021-11-22 14:39:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 14:39:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2021-11-22 14:39:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.2) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-11-22 14:39:00,330 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 23 [2021-11-22 14:39:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:00,331 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-11-22 14:39:00,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:00,331 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-11-22 14:39:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 14:39:00,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:00,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:00,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:00,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:00,534 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash -732186678, now seen corresponding path program 4 times [2021-11-22 14:39:00,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:00,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053559810] [2021-11-22 14:39:00,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:00,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:39:00,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:00,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053559810] [2021-11-22 14:39:00,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053559810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:00,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127801913] [2021-11-22 14:39:00,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:39:00,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:00,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:00,646 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:00,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:39:00,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:39:00,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:39:00,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:39:00,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:39:00,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:39:00,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127801913] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:00,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:00,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-22 14:39:00,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877546978] [2021-11-22 14:39:00,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:00,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-22 14:39:00,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:00,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-22 14:39:00,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-22 14:39:00,904 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:01,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:01,045 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2021-11-22 14:39:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 14:39:01,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-22 14:39:01,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:01,048 INFO L225 Difference]: With dead ends: 65 [2021-11-22 14:39:01,048 INFO L226 Difference]: Without dead ends: 41 [2021-11-22 14:39:01,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-22 14:39:01,049 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:01,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 40 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-22 14:39:01,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-22 14:39:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-11-22 14:39:01,056 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 25 [2021-11-22 14:39:01,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:01,057 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-11-22 14:39:01,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:01,057 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-11-22 14:39:01,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 14:39:01,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:01,058 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:01,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:01,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:01,286 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:01,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:01,287 INFO L85 PathProgramCache]: Analyzing trace with hash 368620396, now seen corresponding path program 5 times [2021-11-22 14:39:01,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:01,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206665721] [2021-11-22 14:39:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:01,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:39:01,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:01,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206665721] [2021-11-22 14:39:01,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206665721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:01,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108104745] [2021-11-22 14:39:01,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:39:01,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:01,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:01,363 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:01,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 14:39:01,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 14:39:01,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:39:01,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-22 14:39:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:01,542 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:39:01,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:39:01,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108104745] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:01,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:01,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2021-11-22 14:39:01,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102851353] [2021-11-22 14:39:01,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:01,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-22 14:39:01,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:01,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-22 14:39:01,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-11-22 14:39:01,636 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:01,802 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2021-11-22 14:39:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 14:39:01,802 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-22 14:39:01,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:01,803 INFO L225 Difference]: With dead ends: 57 [2021-11-22 14:39:01,803 INFO L226 Difference]: Without dead ends: 44 [2021-11-22 14:39:01,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-11-22 14:39:01,805 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:01,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 41 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:01,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-22 14:39:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-11-22 14:39:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-22 14:39:01,812 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-11-22 14:39:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:01,813 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-22 14:39:01,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-22 14:39:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 14:39:01,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:01,814 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:01,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:02,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:02,042 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:02,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:02,042 INFO L85 PathProgramCache]: Analyzing trace with hash 996931278, now seen corresponding path program 6 times [2021-11-22 14:39:02,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:02,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960896446] [2021-11-22 14:39:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:02,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:02,852 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:02,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960896446] [2021-11-22 14:39:02,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960896446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:02,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125352741] [2021-11-22 14:39:02,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:39:02,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:02,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:02,854 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:02,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-22 14:39:02,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-22 14:39:02,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:39:02,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-22 14:39:02,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:03,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:04,565 INFO L354 Elim1Store]: treesize reduction 87, result has 57.8 percent of original size [2021-11-22 14:39:04,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 115 treesize of output 151 [2021-11-22 14:39:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:07,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125352741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:07,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:07,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 51 [2021-11-22 14:39:07,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166800452] [2021-11-22 14:39:07,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:07,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-22 14:39:07,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:07,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-22 14:39:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2292, Unknown=0, NotChecked=0, Total=2550 [2021-11-22 14:39:07,159 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:07,823 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-11-22 14:39:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-22 14:39:07,824 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-22 14:39:07,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:07,825 INFO L225 Difference]: With dead ends: 47 [2021-11-22 14:39:07,825 INFO L226 Difference]: Without dead ends: 43 [2021-11-22 14:39:07,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=378, Invalid=3282, Unknown=0, NotChecked=0, Total=3660 [2021-11-22 14:39:07,827 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:07,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 53 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 460 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2021-11-22 14:39:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-22 14:39:07,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2021-11-22 14:39:07,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:07,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-11-22 14:39:07,834 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2021-11-22 14:39:07,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:07,834 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-11-22 14:39:07,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:07,835 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-11-22 14:39:07,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-22 14:39:07,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:07,836 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:07,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:08,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-22 14:39:08,054 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:08,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:08,054 INFO L85 PathProgramCache]: Analyzing trace with hash 326484464, now seen corresponding path program 7 times [2021-11-22 14:39:08,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:08,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033559947] [2021-11-22 14:39:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:08,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:39:08,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033559947] [2021-11-22 14:39:08,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033559947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:08,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372655749] [2021-11-22 14:39:08,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 14:39:08,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:08,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:08,174 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:08,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-22 14:39:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:08,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 14:39:08,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:39:08,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:39:08,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372655749] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:08,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:08,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-22 14:39:08,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817191679] [2021-11-22 14:39:08,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:08,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 14:39:08,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:08,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 14:39:08,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-11-22 14:39:08,419 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:08,538 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2021-11-22 14:39:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 14:39:08,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-22 14:39:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:08,540 INFO L225 Difference]: With dead ends: 68 [2021-11-22 14:39:08,540 INFO L226 Difference]: Without dead ends: 38 [2021-11-22 14:39:08,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2021-11-22 14:39:08,541 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:08,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 38 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:08,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-22 14:39:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-11-22 14:39:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2021-11-22 14:39:08,548 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 31 [2021-11-22 14:39:08,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:08,548 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2021-11-22 14:39:08,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:08,549 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2021-11-22 14:39:08,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-22 14:39:08,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:08,550 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:08,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:08,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-22 14:39:08,765 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:08,765 INFO L85 PathProgramCache]: Analyzing trace with hash -438567918, now seen corresponding path program 8 times [2021-11-22 14:39:08,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:08,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192354114] [2021-11-22 14:39:08,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:08,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 14:39:08,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:08,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192354114] [2021-11-22 14:39:08,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192354114] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:08,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461028192] [2021-11-22 14:39:08,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:39:08,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:08,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:08,862 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:08,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-22 14:39:08,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:39:08,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:39:08,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-22 14:39:08,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 14:39:09,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 14:39:09,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461028192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:09,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:09,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-22 14:39:09,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140690857] [2021-11-22 14:39:09,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:09,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-22 14:39:09,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:09,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-22 14:39:09,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-22 14:39:09,081 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:09,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:09,240 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-11-22 14:39:09,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 14:39:09,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-22 14:39:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:09,241 INFO L225 Difference]: With dead ends: 52 [2021-11-22 14:39:09,241 INFO L226 Difference]: Without dead ends: 38 [2021-11-22 14:39:09,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2021-11-22 14:39:09,243 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:09,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 35 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:09,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-22 14:39:09,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-11-22 14:39:09,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-22 14:39:09,248 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2021-11-22 14:39:09,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:09,248 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-22 14:39:09,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-22 14:39:09,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-22 14:39:09,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:09,249 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:09,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:09,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:09,454 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash -827015692, now seen corresponding path program 9 times [2021-11-22 14:39:09,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:09,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114611386] [2021-11-22 14:39:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:09,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:10,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:10,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114611386] [2021-11-22 14:39:10,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114611386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:10,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900493833] [2021-11-22 14:39:10,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:39:10,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:10,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:10,487 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:10,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-22 14:39:10,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-22 14:39:10,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:39:10,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-22 14:39:10,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:11,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:11,689 INFO L354 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2021-11-22 14:39:11,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 55 [2021-11-22 14:39:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:39:11,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:14,820 INFO L354 Elim1Store]: treesize reduction 283, result has 33.9 percent of original size [2021-11-22 14:39:14,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 169 treesize of output 191 [2021-11-22 14:39:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:39:15,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900493833] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:15,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:15,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 23] total 67 [2021-11-22 14:39:15,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450126664] [2021-11-22 14:39:15,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:15,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-22 14:39:15,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:15,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-22 14:39:15,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=4087, Unknown=0, NotChecked=0, Total=4422 [2021-11-22 14:39:15,737 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 67 states, 67 states have (on average 1.328358208955224) internal successors, (89), 67 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:17,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:17,881 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-11-22 14:39:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-22 14:39:17,882 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.328358208955224) internal successors, (89), 67 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-22 14:39:17,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:17,883 INFO L225 Difference]: With dead ends: 54 [2021-11-22 14:39:17,883 INFO L226 Difference]: Without dead ends: 50 [2021-11-22 14:39:17,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=691, Invalid=8621, Unknown=0, NotChecked=0, Total=9312 [2021-11-22 14:39:17,887 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:17,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 97 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 469 Invalid, 0 Unknown, 302 Unchecked, 0.3s Time] [2021-11-22 14:39:17,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-22 14:39:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-11-22 14:39:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-11-22 14:39:17,894 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2021-11-22 14:39:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:17,895 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-11-22 14:39:17,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.328358208955224) internal successors, (89), 67 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:17,895 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-11-22 14:39:17,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-22 14:39:17,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:17,896 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:17,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:18,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:18,122 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:18,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:18,122 INFO L85 PathProgramCache]: Analyzing trace with hash -139896938, now seen corresponding path program 10 times [2021-11-22 14:39:18,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:18,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839405627] [2021-11-22 14:39:18,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:18,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 14:39:18,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:18,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839405627] [2021-11-22 14:39:18,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839405627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:18,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406506889] [2021-11-22 14:39:18,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:39:18,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:18,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:18,246 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:18,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-22 14:39:18,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:39:18,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:39:18,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 14:39:18,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 14:39:18,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 14:39:18,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406506889] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:18,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:18,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-22 14:39:18,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53522139] [2021-11-22 14:39:18,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:18,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-22 14:39:18,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:18,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-22 14:39:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-11-22 14:39:18,568 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:18,745 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2021-11-22 14:39:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-22 14:39:18,745 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-22 14:39:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:18,746 INFO L225 Difference]: With dead ends: 80 [2021-11-22 14:39:18,746 INFO L226 Difference]: Without dead ends: 44 [2021-11-22 14:39:18,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2021-11-22 14:39:18,747 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:18,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 42 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:18,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-22 14:39:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-11-22 14:39:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-11-22 14:39:18,758 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 37 [2021-11-22 14:39:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:18,758 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-11-22 14:39:18,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-11-22 14:39:18,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-22 14:39:18,765 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:18,766 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:18,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:18,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:18,990 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:18,990 INFO L85 PathProgramCache]: Analyzing trace with hash 361754680, now seen corresponding path program 11 times [2021-11-22 14:39:18,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:18,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344312175] [2021-11-22 14:39:18,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:18,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 14:39:19,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:19,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344312175] [2021-11-22 14:39:19,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344312175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:19,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533624167] [2021-11-22 14:39:19,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:39:19,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:19,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:19,098 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:19,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-22 14:39:19,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-22 14:39:19,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:39:19,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-22 14:39:19,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 14:39:19,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 14:39:19,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533624167] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:19,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:19,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2021-11-22 14:39:19,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949134033] [2021-11-22 14:39:19,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:19,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-22 14:39:19,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:19,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-22 14:39:19,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-11-22 14:39:19,544 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:19,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:19,797 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-11-22 14:39:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-22 14:39:19,807 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-22 14:39:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:19,808 INFO L225 Difference]: With dead ends: 60 [2021-11-22 14:39:19,808 INFO L226 Difference]: Without dead ends: 44 [2021-11-22 14:39:19,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-11-22 14:39:19,810 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 94 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:19,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 40 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:19,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-22 14:39:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2021-11-22 14:39:19,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-11-22 14:39:19,818 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2021-11-22 14:39:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:19,818 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-11-22 14:39:19,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-11-22 14:39:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-22 14:39:19,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:19,820 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:19,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:20,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-22 14:39:20,038 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:20,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1622323046, now seen corresponding path program 12 times [2021-11-22 14:39:20,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:20,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386912108] [2021-11-22 14:39:20,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:20,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:21,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:21,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386912108] [2021-11-22 14:39:21,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386912108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:21,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182704718] [2021-11-22 14:39:21,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:39:21,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:21,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:21,405 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:21,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-22 14:39:21,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-22 14:39:21,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:39:21,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-22 14:39:21,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:21,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 14:39:22,989 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 14:39:22,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-22 14:39:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:39:23,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 14:39:28,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182704718] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:28,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:28,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 27] total 80 [2021-11-22 14:39:28,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37662281] [2021-11-22 14:39:28,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:28,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-22 14:39:28,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:28,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-22 14:39:28,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=5949, Unknown=0, NotChecked=0, Total=6320 [2021-11-22 14:39:28,511 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 80 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:31,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:31,446 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-11-22 14:39:31,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-22 14:39:31,447 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-22 14:39:31,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:31,447 INFO L225 Difference]: With dead ends: 62 [2021-11-22 14:39:31,447 INFO L226 Difference]: Without dead ends: 58 [2021-11-22 14:39:31,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2788 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=749, Invalid=12133, Unknown=0, NotChecked=0, Total=12882 [2021-11-22 14:39:31,452 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 615 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:31,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 124 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 664 Invalid, 0 Unknown, 615 Unchecked, 0.4s Time] [2021-11-22 14:39:31,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-22 14:39:31,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2021-11-22 14:39:31,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:31,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-11-22 14:39:31,462 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2021-11-22 14:39:31,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:31,463 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-11-22 14:39:31,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:31,463 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-11-22 14:39:31,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-22 14:39:31,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:31,464 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:31,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:31,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-22 14:39:31,674 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:31,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:31,674 INFO L85 PathProgramCache]: Analyzing trace with hash 73914556, now seen corresponding path program 13 times [2021-11-22 14:39:31,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:31,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238899284] [2021-11-22 14:39:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:31,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:31,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:31,802 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 14:39:31,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:31,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238899284] [2021-11-22 14:39:31,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238899284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:31,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318669706] [2021-11-22 14:39:31,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 14:39:31,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:31,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:31,809 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:31,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-22 14:39:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:31,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 14:39:31,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 14:39:32,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 14:39:32,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318669706] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:32,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:32,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-22 14:39:32,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574575635] [2021-11-22 14:39:32,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:32,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-22 14:39:32,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:32,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-22 14:39:32,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-11-22 14:39:32,141 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:32,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:32,300 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2021-11-22 14:39:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 14:39:32,301 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-22 14:39:32,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:32,301 INFO L225 Difference]: With dead ends: 92 [2021-11-22 14:39:32,302 INFO L226 Difference]: Without dead ends: 50 [2021-11-22 14:39:32,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-11-22 14:39:32,303 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:32,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 49 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-22 14:39:32,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-11-22 14:39:32,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-11-22 14:39:32,314 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 43 [2021-11-22 14:39:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:32,314 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-11-22 14:39:32,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-11-22 14:39:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-22 14:39:32,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:32,315 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:32,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:32,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-22 14:39:32,518 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:32,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:32,518 INFO L85 PathProgramCache]: Analyzing trace with hash -894570530, now seen corresponding path program 14 times [2021-11-22 14:39:32,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:32,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775290890] [2021-11-22 14:39:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:32,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 14:39:32,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:32,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775290890] [2021-11-22 14:39:32,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775290890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:32,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19437470] [2021-11-22 14:39:32,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:39:32,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:32,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:32,632 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:32,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-22 14:39:32,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:39:32,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:39:32,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-22 14:39:32,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 14:39:32,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 14:39:32,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19437470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:32,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:32,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-22 14:39:32,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914602695] [2021-11-22 14:39:32,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:32,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-22 14:39:32,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:32,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-22 14:39:32,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-11-22 14:39:32,994 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:33,216 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-11-22 14:39:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-22 14:39:33,216 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-22 14:39:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:33,217 INFO L225 Difference]: With dead ends: 68 [2021-11-22 14:39:33,217 INFO L226 Difference]: Without dead ends: 50 [2021-11-22 14:39:33,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-11-22 14:39:33,218 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 119 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:33,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 27 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-22 14:39:33,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-11-22 14:39:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-11-22 14:39:33,235 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2021-11-22 14:39:33,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:33,237 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-11-22 14:39:33,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:33,238 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-11-22 14:39:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-22 14:39:33,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:33,238 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:33,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:33,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-22 14:39:33,450 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:33,450 INFO L85 PathProgramCache]: Analyzing trace with hash 49745600, now seen corresponding path program 15 times [2021-11-22 14:39:33,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:33,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594788661] [2021-11-22 14:39:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:33,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:35,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:35,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594788661] [2021-11-22 14:39:35,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594788661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:35,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509544068] [2021-11-22 14:39:35,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:39:35,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:35,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:35,085 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:35,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-22 14:39:35,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-22 14:39:35,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:39:35,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-22 14:39:35,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:35,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 14:39:39,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:39,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:39,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:39,113 INFO L354 Elim1Store]: treesize reduction 98, result has 44.6 percent of original size [2021-11-22 14:39:39,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 97 [2021-11-22 14:39:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 7 proven. 92 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:39:39,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 14:39:45,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509544068] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:45,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:45,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 34, 31] total 93 [2021-11-22 14:39:45,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719778556] [2021-11-22 14:39:45,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:45,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-22 14:39:45,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:45,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-22 14:39:45,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=8042, Unknown=0, NotChecked=0, Total=8556 [2021-11-22 14:39:45,981 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 93 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 93 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:51,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:51,070 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-11-22 14:39:51,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-22 14:39:51,071 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 93 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-22 14:39:51,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:51,072 INFO L225 Difference]: With dead ends: 69 [2021-11-22 14:39:51,072 INFO L226 Difference]: Without dead ends: 65 [2021-11-22 14:39:51,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3637 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=1070, Invalid=17020, Unknown=0, NotChecked=0, Total=18090 [2021-11-22 14:39:51,074 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:51,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 133 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 854 Invalid, 0 Unknown, 727 Unchecked, 0.6s Time] [2021-11-22 14:39:51,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-22 14:39:51,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-11-22 14:39:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:51,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2021-11-22 14:39:51,084 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2021-11-22 14:39:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:51,084 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2021-11-22 14:39:51,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 93 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:51,085 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2021-11-22 14:39:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-22 14:39:51,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:51,086 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:51,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:51,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:51,302 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:51,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:51,302 INFO L85 PathProgramCache]: Analyzing trace with hash 614114658, now seen corresponding path program 16 times [2021-11-22 14:39:51,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:51,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962301143] [2021-11-22 14:39:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:51,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 14:39:51,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:51,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962301143] [2021-11-22 14:39:51,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962301143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:51,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249000555] [2021-11-22 14:39:51,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:39:51,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:51,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:51,438 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:51,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-22 14:39:51,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:39:51,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:39:51,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 14:39:51,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 14:39:51,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 14:39:51,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249000555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:51,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:51,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-22 14:39:51,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352646790] [2021-11-22 14:39:51,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:51,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-22 14:39:51,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:51,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-22 14:39:51,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2021-11-22 14:39:51,787 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:51,984 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2021-11-22 14:39:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-22 14:39:51,984 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-22 14:39:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:51,985 INFO L225 Difference]: With dead ends: 104 [2021-11-22 14:39:51,985 INFO L226 Difference]: Without dead ends: 56 [2021-11-22 14:39:51,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-11-22 14:39:51,986 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:51,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 44 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:39:51,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-22 14:39:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-11-22 14:39:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-11-22 14:39:51,999 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 49 [2021-11-22 14:39:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:52,000 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-11-22 14:39:52,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:52,000 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-11-22 14:39:52,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-22 14:39:52,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:52,001 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:52,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-11-22 14:39:52,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:52,201 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:52,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:52,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1413962500, now seen corresponding path program 17 times [2021-11-22 14:39:52,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:52,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828170518] [2021-11-22 14:39:52,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:52,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-22 14:39:52,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:52,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828170518] [2021-11-22 14:39:52,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828170518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:52,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545262064] [2021-11-22 14:39:52,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:39:52,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:52,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:52,359 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:52,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-22 14:39:52,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-22 14:39:52,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:39:52,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-22 14:39:52,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-22 14:39:52,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:39:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-22 14:39:52,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545262064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:39:52,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:39:52,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2021-11-22 14:39:52,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613934077] [2021-11-22 14:39:52,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:39:52,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-22 14:39:52,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:39:52,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-22 14:39:52,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1265, Unknown=0, NotChecked=0, Total=1482 [2021-11-22 14:39:52,890 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:53,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:39:53,283 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-11-22 14:39:53,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-22 14:39:53,284 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-22 14:39:53,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:39:53,284 INFO L225 Difference]: With dead ends: 76 [2021-11-22 14:39:53,284 INFO L226 Difference]: Without dead ends: 56 [2021-11-22 14:39:53,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 14:39:53,285 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 117 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:39:53,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 54 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:39:53,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-22 14:39:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-11-22 14:39:53,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-11-22 14:39:53,293 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2021-11-22 14:39:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:39:53,294 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-11-22 14:39:53,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 39 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:39:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-11-22 14:39:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-22 14:39:53,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:39:53,295 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:39:53,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-22 14:39:53,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:53,498 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:39:53,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:39:53,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1158981530, now seen corresponding path program 18 times [2021-11-22 14:39:53,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:39:53,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251720252] [2021-11-22 14:39:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:39:53,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:39:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:39:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:39:55,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:39:55,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251720252] [2021-11-22 14:39:55,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251720252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:39:55,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046326663] [2021-11-22 14:39:55,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:39:55,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:39:55,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:39:55,422 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:39:55,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-22 14:39:55,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-22 14:39:55,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:39:55,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-22 14:39:55,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:39:59,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:59,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:59,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:59,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:59,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:59,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:59,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:59,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:59,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:59,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:39:59,376 INFO L354 Elim1Store]: treesize reduction 332, result has 37.7 percent of original size [2021-11-22 14:39:59,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 99 treesize of output 223 [2021-11-22 14:39:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 13 proven. 98 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 14:39:59,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:07,844 INFO L354 Elim1Store]: treesize reduction 1183, result has 20.9 percent of original size [2021-11-22 14:40:07,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 289 treesize of output 371 [2021-11-22 14:40:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 14:40:25,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046326663] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:40:25,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:40:25,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 36, 35] total 105 [2021-11-22 14:40:25,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707460876] [2021-11-22 14:40:25,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:25,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-22 14:40:25,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:25,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-22 14:40:25,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=663, Invalid=10257, Unknown=0, NotChecked=0, Total=10920 [2021-11-22 14:40:25,252 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 105 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 105 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:33,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:33,566 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2021-11-22 14:40:33,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-22 14:40:33,567 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 105 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-22 14:40:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:33,568 INFO L225 Difference]: With dead ends: 76 [2021-11-22 14:40:33,568 INFO L226 Difference]: Without dead ends: 72 [2021-11-22 14:40:33,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4044 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=1330, Invalid=21622, Unknown=0, NotChecked=0, Total=22952 [2021-11-22 14:40:33,571 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 900 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:33,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 154 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1309 Invalid, 0 Unknown, 900 Unchecked, 0.8s Time] [2021-11-22 14:40:33,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-22 14:40:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2021-11-22 14:40:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:33,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-11-22 14:40:33,582 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2021-11-22 14:40:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:33,582 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-11-22 14:40:33,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 105 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-11-22 14:40:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-22 14:40:33,583 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:33,584 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:33,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-11-22 14:40:33,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:33,786 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:40:33,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:33,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1331487352, now seen corresponding path program 19 times [2021-11-22 14:40:33,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:33,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018930508] [2021-11-22 14:40:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:33,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:33,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-22 14:40:33,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:33,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018930508] [2021-11-22 14:40:33,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018930508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:33,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846535288] [2021-11-22 14:40:33,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 14:40:33,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:33,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:33,962 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:33,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-22 14:40:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:34,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 14:40:34,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-22 14:40:34,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-22 14:40:34,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846535288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:40:34,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:40:34,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-22 14:40:34,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157498862] [2021-11-22 14:40:34,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:34,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-22 14:40:34,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:34,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-22 14:40:34,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-11-22 14:40:34,381 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:34,636 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2021-11-22 14:40:34,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-22 14:40:34,637 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-22 14:40:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:34,638 INFO L225 Difference]: With dead ends: 116 [2021-11-22 14:40:34,638 INFO L226 Difference]: Without dead ends: 62 [2021-11-22 14:40:34,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-11-22 14:40:34,642 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 50 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:34,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 42 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:40:34,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-22 14:40:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-22 14:40:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-11-22 14:40:34,651 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 55 [2021-11-22 14:40:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:34,651 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-11-22 14:40:34,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-11-22 14:40:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-22 14:40:34,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:34,653 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:34,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:34,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:34,866 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:40:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:34,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1327132246, now seen corresponding path program 20 times [2021-11-22 14:40:34,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:34,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205145224] [2021-11-22 14:40:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:34,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-22 14:40:35,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:35,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205145224] [2021-11-22 14:40:35,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205145224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:35,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590663624] [2021-11-22 14:40:35,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:40:35,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:35,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:35,046 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:35,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-22 14:40:35,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:40:35,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:40:35,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 14:40:35,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-22 14:40:35,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-22 14:40:35,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590663624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:40:35,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:40:35,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-22 14:40:35,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125308843] [2021-11-22 14:40:35,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:35,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-22 14:40:35,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-22 14:40:35,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2021-11-22 14:40:35,549 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:40:35,814 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2021-11-22 14:40:35,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-22 14:40:35,815 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-22 14:40:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:40:35,815 INFO L225 Difference]: With dead ends: 84 [2021-11-22 14:40:35,815 INFO L226 Difference]: Without dead ends: 62 [2021-11-22 14:40:35,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=430, Invalid=1052, Unknown=0, NotChecked=0, Total=1482 [2021-11-22 14:40:35,817 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 126 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:40:35,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 37 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:40:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-22 14:40:35,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-11-22 14:40:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:35,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-11-22 14:40:35,826 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2021-11-22 14:40:35,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:40:35,826 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-11-22 14:40:35,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:40:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-11-22 14:40:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-22 14:40:35,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:40:35,827 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:40:35,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-22 14:40:36,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-22 14:40:36,029 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:40:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:40:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash -103051892, now seen corresponding path program 21 times [2021-11-22 14:40:36,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:40:36,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993078511] [2021-11-22 14:40:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:40:36,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:40:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:40:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:40:38,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:40:38,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993078511] [2021-11-22 14:40:38,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993078511] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:40:38,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788373268] [2021-11-22 14:40:38,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:40:38,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:40:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:40:38,734 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:40:38,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-22 14:40:38,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-22 14:40:38,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:40:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-22 14:40:38,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:40:38,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 14:40:43,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:40:43,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:40:43,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:40:43,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:40:43,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:40:43,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:40:43,145 INFO L354 Elim1Store]: treesize reduction 198, result has 40.2 percent of original size [2021-11-22 14:40:43,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 81 treesize of output 153 [2021-11-22 14:40:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 9 proven. 167 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-22 14:40:43,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:40:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-22 14:40:55,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788373268] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:40:55,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:40:55,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 43, 39] total 119 [2021-11-22 14:40:55,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966883300] [2021-11-22 14:40:55,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:40:55,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-22 14:40:55,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:40:55,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-22 14:40:55,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=13304, Unknown=0, NotChecked=0, Total=14042 [2021-11-22 14:40:55,196 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 119 states, 119 states have (on average 1.218487394957983) internal successors, (145), 119 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:04,326 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2021-11-22 14:41:04,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-22 14:41:04,327 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.218487394957983) internal successors, (145), 119 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-22 14:41:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:04,327 INFO L225 Difference]: With dead ends: 86 [2021-11-22 14:41:04,327 INFO L226 Difference]: Without dead ends: 82 [2021-11-22 14:41:04,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5453 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=1538, Invalid=28218, Unknown=0, NotChecked=0, Total=29756 [2021-11-22 14:41:04,329 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 69 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 1514 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1340 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:04,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 176 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1514 Invalid, 0 Unknown, 1340 Unchecked, 0.9s Time] [2021-11-22 14:41:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-22 14:41:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2021-11-22 14:41:04,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-11-22 14:41:04,339 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2021-11-22 14:41:04,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:04,339 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-11-22 14:41:04,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.218487394957983) internal successors, (145), 119 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-11-22 14:41:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-22 14:41:04,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:04,340 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:04,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:04,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-22 14:41:04,554 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:04,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:04,554 INFO L85 PathProgramCache]: Analyzing trace with hash -195387090, now seen corresponding path program 22 times [2021-11-22 14:41:04,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:04,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248811685] [2021-11-22 14:41:04,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:04,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 79 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-22 14:41:04,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:04,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248811685] [2021-11-22 14:41:04,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248811685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:04,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289262646] [2021-11-22 14:41:04,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:41:04,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:04,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:04,758 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:04,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-22 14:41:04,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:41:04,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:04,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 14:41:04,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-22 14:41:05,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-22 14:41:05,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289262646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:05,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:05,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-11-22 14:41:05,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069538676] [2021-11-22 14:41:05,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:05,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-22 14:41:05,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:05,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-22 14:41:05,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2021-11-22 14:41:05,283 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:05,570 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2021-11-22 14:41:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-22 14:41:05,571 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-22 14:41:05,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:05,571 INFO L225 Difference]: With dead ends: 128 [2021-11-22 14:41:05,571 INFO L226 Difference]: Without dead ends: 68 [2021-11-22 14:41:05,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=1319, Unknown=0, NotChecked=0, Total=1722 [2021-11-22 14:41:05,573 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:05,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 58 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:41:05,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-22 14:41:05,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-22 14:41:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-11-22 14:41:05,594 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 61 [2021-11-22 14:41:05,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:05,594 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-11-22 14:41:05,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-11-22 14:41:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-22 14:41:05,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:05,595 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:05,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:05,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:05,822 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:05,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1802898480, now seen corresponding path program 23 times [2021-11-22 14:41:05,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:05,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699515522] [2021-11-22 14:41:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:05,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-22 14:41:06,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:06,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699515522] [2021-11-22 14:41:06,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699515522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:06,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172871855] [2021-11-22 14:41:06,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:41:06,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:06,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:06,016 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:06,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-22 14:41:06,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-22 14:41:06,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:06,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-22 14:41:06,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-22 14:41:06,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-22 14:41:06,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172871855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:41:06,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:41:06,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2021-11-22 14:41:06,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534178345] [2021-11-22 14:41:06,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:41:06,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-22 14:41:06,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:41:06,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-22 14:41:06,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-11-22 14:41:06,740 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:07,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:41:07,167 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2021-11-22 14:41:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 14:41:07,168 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-22 14:41:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:41:07,168 INFO L225 Difference]: With dead ends: 92 [2021-11-22 14:41:07,168 INFO L226 Difference]: Without dead ends: 68 [2021-11-22 14:41:07,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=619, Invalid=3041, Unknown=0, NotChecked=0, Total=3660 [2021-11-22 14:41:07,169 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 228 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:41:07,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 40 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:41:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-22 14:41:07,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-11-22 14:41:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-11-22 14:41:07,180 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2021-11-22 14:41:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:41:07,180 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-11-22 14:41:07,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:41:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-11-22 14:41:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-22 14:41:07,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:41:07,181 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:41:07,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-22 14:41:07,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:07,386 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:41:07,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:41:07,386 INFO L85 PathProgramCache]: Analyzing trace with hash -370078158, now seen corresponding path program 24 times [2021-11-22 14:41:07,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:41:07,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402191381] [2021-11-22 14:41:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:41:07,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:41:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:41:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:41:10,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:41:10,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402191381] [2021-11-22 14:41:10,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402191381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:41:10,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220073169] [2021-11-22 14:41:10,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:41:10,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:41:10,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:41:10,475 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:41:10,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-22 14:41:10,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-22 14:41:10,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:41:10,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-22 14:41:10,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:41:15,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:41:15,476 INFO L354 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2021-11-22 14:41:15,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 55 [2021-11-22 14:41:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 5 proven. 234 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:41:15,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:41:34,248 INFO L354 Elim1Store]: treesize reduction 1438, result has 37.8 percent of original size [2021-11-22 14:41:34,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 339 treesize of output 941 [2021-11-22 14:42:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 179 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-22 14:42:16,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220073169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:16,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:16,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 50, 43] total 132 [2021-11-22 14:42:16,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371406221] [2021-11-22 14:42:16,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:16,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-22 14:42:16,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:16,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-22 14:42:16,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=745, Invalid=16547, Unknown=0, NotChecked=0, Total=17292 [2021-11-22 14:42:16,029 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 132 states, 132 states have (on average 1.2045454545454546) internal successors, (159), 132 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:42:26,953 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-11-22 14:42:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-22 14:42:26,954 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.2045454545454546) internal successors, (159), 132 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-22 14:42:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:42:26,955 INFO L225 Difference]: With dead ends: 93 [2021-11-22 14:42:26,955 INFO L226 Difference]: Without dead ends: 89 [2021-11-22 14:42:26,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6603 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=1561, Invalid=35111, Unknown=0, NotChecked=0, Total=36672 [2021-11-22 14:42:26,959 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 3571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1675 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:42:26,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 193 Invalid, 3571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1815 Invalid, 0 Unknown, 1675 Unchecked, 1.1s Time] [2021-11-22 14:42:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-22 14:42:26,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-11-22 14:42:26,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:26,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2021-11-22 14:42:26,974 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 65 [2021-11-22 14:42:26,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:42:26,974 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2021-11-22 14:42:26,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.2045454545454546) internal successors, (159), 132 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:26,974 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2021-11-22 14:42:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-22 14:42:26,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:42:26,975 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:26,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:27,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-22 14:42:27,182 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:42:27,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:27,182 INFO L85 PathProgramCache]: Analyzing trace with hash 890409044, now seen corresponding path program 25 times [2021-11-22 14:42:27,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:27,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092103821] [2021-11-22 14:42:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:27,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-22 14:42:27,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:27,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092103821] [2021-11-22 14:42:27,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092103821] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:27,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579631094] [2021-11-22 14:42:27,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 14:42:27,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:27,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:27,429 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:27,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-22 14:42:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:27,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-22 14:42:27,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-22 14:42:27,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-22 14:42:27,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579631094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:27,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:27,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2021-11-22 14:42:27,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314334259] [2021-11-22 14:42:27,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:27,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-22 14:42:27,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:27,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-22 14:42:27,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 14:42:27,993 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:42:28,330 INFO L93 Difference]: Finished difference Result 140 states and 146 transitions. [2021-11-22 14:42:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-22 14:42:28,330 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-22 14:42:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:42:28,331 INFO L225 Difference]: With dead ends: 140 [2021-11-22 14:42:28,331 INFO L226 Difference]: Without dead ends: 74 [2021-11-22 14:42:28,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=481, Invalid=1589, Unknown=0, NotChecked=0, Total=2070 [2021-11-22 14:42:28,332 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:42:28,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 66 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:42:28,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-22 14:42:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-22 14:42:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2021-11-22 14:42:28,353 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 67 [2021-11-22 14:42:28,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:42:28,353 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2021-11-22 14:42:28,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:28,353 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2021-11-22 14:42:28,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-22 14:42:28,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:42:28,354 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:28,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:28,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-22 14:42:28,566 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:42:28,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:28,566 INFO L85 PathProgramCache]: Analyzing trace with hash -290594442, now seen corresponding path program 26 times [2021-11-22 14:42:28,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:28,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796669464] [2021-11-22 14:42:28,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:28,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-22 14:42:28,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:28,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796669464] [2021-11-22 14:42:28,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796669464] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:28,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945561177] [2021-11-22 14:42:28,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:42:28,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:28,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:28,826 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:28,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-22 14:42:28,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:42:28,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:28,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-22 14:42:28,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-22 14:42:29,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:42:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-22 14:42:29,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945561177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:42:29,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:42:29,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2021-11-22 14:42:29,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092460241] [2021-11-22 14:42:29,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:42:29,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-22 14:42:29,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:42:29,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-22 14:42:29,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 14:42:29,454 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:42:29,835 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2021-11-22 14:42:29,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-22 14:42:29,836 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-22 14:42:29,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:42:29,836 INFO L225 Difference]: With dead ends: 100 [2021-11-22 14:42:29,837 INFO L226 Difference]: Without dead ends: 74 [2021-11-22 14:42:29,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=623, Invalid=1539, Unknown=0, NotChecked=0, Total=2162 [2021-11-22 14:42:29,838 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 169 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:42:29,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 29 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:42:29,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-22 14:42:29,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-11-22 14:42:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:29,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-11-22 14:42:29,853 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2021-11-22 14:42:29,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:42:29,853 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-11-22 14:42:29,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:42:29,853 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-11-22 14:42:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-22 14:42:29,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:42:29,854 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:42:29,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-22 14:42:30,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-22 14:42:30,054 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:42:30,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:42:30,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1295173032, now seen corresponding path program 27 times [2021-11-22 14:42:30,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:42:30,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241689883] [2021-11-22 14:42:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:42:30,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:42:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:42:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 25 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:42:34,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:42:34,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241689883] [2021-11-22 14:42:34,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241689883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:42:34,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801688180] [2021-11-22 14:42:34,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:42:34,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:42:34,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:42:34,091 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:42:34,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-22 14:42:34,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-22 14:42:34,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:42:34,206 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-22 14:42:34,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:42:34,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 14:42:41,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:42:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:42:41,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:42:41,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:42:41,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:42:41,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:42:41,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:42:41,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:42:41,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:42:41,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:42:42,096 INFO L354 Elim1Store]: treesize reduction 332, result has 37.7 percent of original size [2021-11-22 14:42:42,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 99 treesize of output 223 [2021-11-22 14:42:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 11 proven. 264 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-22 14:42:42,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:43:06,468 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-22 14:43:06,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801688180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:43:06,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:43:06,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 52, 47] total 145 [2021-11-22 14:43:06,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51496371] [2021-11-22 14:43:06,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:43:06,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2021-11-22 14:43:06,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:06,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2021-11-22 14:43:06,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=973, Invalid=19907, Unknown=0, NotChecked=0, Total=20880 [2021-11-22 14:43:06,470 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 145 states, 145 states have (on average 1.193103448275862) internal successors, (173), 145 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:24,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:43:24,008 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2021-11-22 14:43:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-22 14:43:24,009 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.193103448275862) internal successors, (173), 145 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-22 14:43:24,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:43:24,009 INFO L225 Difference]: With dead ends: 100 [2021-11-22 14:43:24,009 INFO L226 Difference]: Without dead ends: 96 [2021-11-22 14:43:24,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8301 ImplicationChecksByTransitivity, 46.1s TimeCoverageRelationStatistics Valid=2182, Invalid=42128, Unknown=0, NotChecked=0, Total=44310 [2021-11-22 14:43:24,012 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 3728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1586 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:43:24,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 207 Invalid, 3728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1986 Invalid, 0 Unknown, 1586 Unchecked, 1.4s Time] [2021-11-22 14:43:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-22 14:43:24,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2021-11-22 14:43:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:24,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-11-22 14:43:24,037 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 71 [2021-11-22 14:43:24,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:43:24,038 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-11-22 14:43:24,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.193103448275862) internal successors, (173), 145 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-11-22 14:43:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-22 14:43:24,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:43:24,039 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:24,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-22 14:43:24,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:43:24,250 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:43:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash 932465402, now seen corresponding path program 28 times [2021-11-22 14:43:24,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:24,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237115140] [2021-11-22 14:43:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:24,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-22 14:43:24,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:24,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237115140] [2021-11-22 14:43:24,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237115140] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:43:24,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032395182] [2021-11-22 14:43:24,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:43:24,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:43:24,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:43:24,553 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:43:24,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-22 14:43:24,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:43:24,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:43:24,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-22 14:43:24,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:43:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-22 14:43:24,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:43:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-22 14:43:25,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032395182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:43:25,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:43:25,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2021-11-22 14:43:25,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368997128] [2021-11-22 14:43:25,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:43:25,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-22 14:43:25,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:25,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-22 14:43:25,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2021-11-22 14:43:25,107 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:43:25,470 INFO L93 Difference]: Finished difference Result 152 states and 158 transitions. [2021-11-22 14:43:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-22 14:43:25,470 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-22 14:43:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:43:25,471 INFO L225 Difference]: With dead ends: 152 [2021-11-22 14:43:25,471 INFO L226 Difference]: Without dead ends: 80 [2021-11-22 14:43:25,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=566, Invalid=1884, Unknown=0, NotChecked=0, Total=2450 [2021-11-22 14:43:25,472 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:43:25,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 58 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:43:25,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-22 14:43:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-11-22 14:43:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-11-22 14:43:25,499 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 73 [2021-11-22 14:43:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:43:25,500 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-11-22 14:43:25,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 38 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-11-22 14:43:25,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-22 14:43:25,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:43:25,501 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:25,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-22 14:43:25,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-22 14:43:25,718 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:43:25,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:25,718 INFO L85 PathProgramCache]: Analyzing trace with hash -264062308, now seen corresponding path program 29 times [2021-11-22 14:43:25,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:25,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003621026] [2021-11-22 14:43:25,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:25,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 81 proven. 140 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-22 14:43:26,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003621026] [2021-11-22 14:43:26,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003621026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:43:26,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835421489] [2021-11-22 14:43:26,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:43:26,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:43:26,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:43:26,034 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:43:26,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-22 14:43:26,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-22 14:43:26,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:43:26,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-22 14:43:26,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:43:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-22 14:43:27,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:43:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-22 14:43:27,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835421489] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:43:27,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:43:27,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2021-11-22 14:43:27,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499262814] [2021-11-22 14:43:27,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:43:27,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-22 14:43:27,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:43:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-22 14:43:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=2953, Unknown=0, NotChecked=0, Total=3422 [2021-11-22 14:43:27,381 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:27,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:43:27,988 INFO L93 Difference]: Finished difference Result 108 states and 112 transitions. [2021-11-22 14:43:27,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 14:43:27,989 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-22 14:43:27,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:43:27,990 INFO L225 Difference]: With dead ends: 108 [2021-11-22 14:43:27,990 INFO L226 Difference]: Without dead ends: 80 [2021-11-22 14:43:27,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=874, Invalid=4382, Unknown=0, NotChecked=0, Total=5256 [2021-11-22 14:43:27,991 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 199 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:43:27,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 43 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:43:27,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-22 14:43:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2021-11-22 14:43:28,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:28,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-11-22 14:43:28,013 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2021-11-22 14:43:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:43:28,014 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-11-22 14:43:28,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:43:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-11-22 14:43:28,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-22 14:43:28,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:43:28,014 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:43:28,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-22 14:43:28,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-22 14:43:28,215 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:43:28,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:43:28,216 INFO L85 PathProgramCache]: Analyzing trace with hash -7769602, now seen corresponding path program 30 times [2021-11-22 14:43:28,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:43:28,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144165959] [2021-11-22 14:43:28,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:43:28,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:43:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:43:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 36 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:43:33,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:43:33,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144165959] [2021-11-22 14:43:33,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144165959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:43:33,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055110849] [2021-11-22 14:43:33,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:43:33,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:43:33,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:43:33,273 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:43:33,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-22 14:43:33,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-22 14:43:33,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:43:33,517 WARN L261 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-22 14:43:33,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:43:46,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:46,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:43:47,118 INFO L354 Elim1Store]: treesize reduction 938, result has 34.3 percent of original size [2021-11-22 14:43:47,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 28 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 153 treesize of output 517 [2021-11-22 14:43:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 17 proven. 282 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-22 14:43:48,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:44:21,594 INFO L354 Elim1Store]: treesize reduction 3130, result has 19.0 percent of original size [2021-11-22 14:44:21,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 0 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 443 treesize of output 809 [2021-11-22 14:45:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-22 14:45:38,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055110849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:45:38,169 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:45:38,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 54, 51] total 158 [2021-11-22 14:45:38,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512043916] [2021-11-22 14:45:38,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:45:38,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2021-11-22 14:45:38,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:45:38,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2021-11-22 14:45:38,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1220, Invalid=23586, Unknown=0, NotChecked=0, Total=24806 [2021-11-22 14:45:38,173 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 158 states, 158 states have (on average 1.1835443037974684) internal successors, (187), 158 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:06,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:06,707 INFO L93 Difference]: Finished difference Result 109 states and 112 transitions. [2021-11-22 14:46:06,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-22 14:46:06,708 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 1.1835443037974684) internal successors, (187), 158 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-22 14:46:06,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:06,709 INFO L225 Difference]: With dead ends: 109 [2021-11-22 14:46:06,709 INFO L226 Difference]: Without dead ends: 105 [2021-11-22 14:46:06,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9762 ImplicationChecksByTransitivity, 68.6s TimeCoverageRelationStatistics Valid=2768, Invalid=50362, Unknown=0, NotChecked=0, Total=53130 [2021-11-22 14:46:06,713 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 4596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1708 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:06,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 236 Invalid, 4596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2706 Invalid, 0 Unknown, 1708 Unchecked, 2.1s Time] [2021-11-22 14:46:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-22 14:46:06,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2021-11-22 14:46:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:06,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-11-22 14:46:06,736 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 77 [2021-11-22 14:46:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:06,736 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-11-22 14:46:06,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 1.1835443037974684) internal successors, (187), 158 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:06,736 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-11-22 14:46:06,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-22 14:46:06,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:06,737 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:46:06,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-22 14:46:06,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-22 14:46:06,937 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:46:06,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:06,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1176580384, now seen corresponding path program 31 times [2021-11-22 14:46:06,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:06,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839336020] [2021-11-22 14:46:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:06,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 123 proven. 142 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-22 14:46:07,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:07,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839336020] [2021-11-22 14:46:07,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839336020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:46:07,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290266424] [2021-11-22 14:46:07,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 14:46:07,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:46:07,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:46:07,250 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:46:07,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-22 14:46:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:07,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-22 14:46:07,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:46:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-22 14:46:07,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:46:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-22 14:46:08,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290266424] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:46:08,146 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:46:08,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2021-11-22 14:46:08,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912301819] [2021-11-22 14:46:08,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:46:08,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-22 14:46:08,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:08,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-22 14:46:08,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1258, Unknown=0, NotChecked=0, Total=1640 [2021-11-22 14:46:08,147 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:08,634 INFO L93 Difference]: Finished difference Result 164 states and 170 transitions. [2021-11-22 14:46:08,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-22 14:46:08,634 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-22 14:46:08,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:08,635 INFO L225 Difference]: With dead ends: 164 [2021-11-22 14:46:08,635 INFO L226 Difference]: Without dead ends: 86 [2021-11-22 14:46:08,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=658, Invalid=2204, Unknown=0, NotChecked=0, Total=2862 [2021-11-22 14:46:08,636 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 57 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:08,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 52 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:46:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-22 14:46:08,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-11-22 14:46:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2021-11-22 14:46:08,660 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 79 [2021-11-22 14:46:08,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:08,660 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2021-11-22 14:46:08,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:08,661 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2021-11-22 14:46:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-22 14:46:08,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:08,661 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:46:08,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-22 14:46:08,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:46:08,862 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:46:08,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:08,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1850613950, now seen corresponding path program 32 times [2021-11-22 14:46:08,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:08,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876625211] [2021-11-22 14:46:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:08,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-22 14:46:09,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:09,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876625211] [2021-11-22 14:46:09,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876625211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:46:09,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539853442] [2021-11-22 14:46:09,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:46:09,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:46:09,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:46:09,253 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:46:09,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-22 14:46:09,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:46:09,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:46:09,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-22 14:46:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:46:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-22 14:46:09,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:46:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-22 14:46:10,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539853442] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:46:10,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:46:10,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2021-11-22 14:46:10,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97994145] [2021-11-22 14:46:10,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:46:10,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-22 14:46:10,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:46:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-22 14:46:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1247, Unknown=0, NotChecked=0, Total=1640 [2021-11-22 14:46:10,037 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:10,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:46:10,405 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2021-11-22 14:46:10,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-22 14:46:10,406 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-22 14:46:10,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:46:10,406 INFO L225 Difference]: With dead ends: 116 [2021-11-22 14:46:10,406 INFO L226 Difference]: Without dead ends: 86 [2021-11-22 14:46:10,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=852, Invalid=2118, Unknown=0, NotChecked=0, Total=2970 [2021-11-22 14:46:10,407 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 159 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:46:10,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 26 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:46:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-22 14:46:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-11-22 14:46:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-11-22 14:46:10,431 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2021-11-22 14:46:10,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:46:10,431 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-11-22 14:46:10,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:46:10,432 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-11-22 14:46:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-22 14:46:10,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:46:10,433 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:46:10,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-22 14:46:10,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:46:10,638 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:46:10,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:46:10,638 INFO L85 PathProgramCache]: Analyzing trace with hash 79107364, now seen corresponding path program 33 times [2021-11-22 14:46:10,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:46:10,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190740564] [2021-11-22 14:46:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:46:10,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:46:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:46:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 36 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:46:17,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:46:17,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190740564] [2021-11-22 14:46:17,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190740564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:46:17,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072961527] [2021-11-22 14:46:17,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:46:17,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:46:17,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:46:17,063 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:46:17,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-22 14:46:17,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-22 14:46:17,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:46:17,207 WARN L261 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 131 conjunts are in the unsatisfiable core [2021-11-22 14:46:17,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:46:17,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 14:46:32,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:46:32,871 INFO L354 Elim1Store]: treesize reduction 500, result has 36.1 percent of original size [2021-11-22 14:46:32,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 117 treesize of output 307 [2021-11-22 14:46:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 13 proven. 383 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-22 14:46:33,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:47:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-22 14:47:15,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072961527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:47:15,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:47:15,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 61, 55] total 172 [2021-11-22 14:47:15,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033024677] [2021-11-22 14:47:15,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:47:15,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2021-11-22 14:47:15,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:15,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2021-11-22 14:47:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=28131, Unknown=1, NotChecked=0, Total=29412 [2021-11-22 14:47:15,585 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 172 states, 172 states have (on average 1.180232558139535) internal successors, (203), 172 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:46,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:46,170 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2021-11-22 14:47:46,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-22 14:47:46,170 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 172 states have (on average 1.180232558139535) internal successors, (203), 172 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-22 14:47:46,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:46,171 INFO L225 Difference]: With dead ends: 117 [2021-11-22 14:47:46,171 INFO L226 Difference]: Without dead ends: 113 [2021-11-22 14:47:46,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11472 ImplicationChecksByTransitivity, 84.4s TimeCoverageRelationStatistics Valid=2946, Invalid=59803, Unknown=1, NotChecked=0, Total=62750 [2021-11-22 14:47:46,177 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 89 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 5503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2700 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:46,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 230 Invalid, 5503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2586 Invalid, 0 Unknown, 2700 Unchecked, 2.1s Time] [2021-11-22 14:47:46,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-22 14:47:46,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 89. [2021-11-22 14:47:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:46,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2021-11-22 14:47:46,221 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 83 [2021-11-22 14:47:46,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:46,222 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2021-11-22 14:47:46,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 172 states have (on average 1.180232558139535) internal successors, (203), 172 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:46,222 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2021-11-22 14:47:46,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-22 14:47:46,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:46,222 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:47:46,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-22 14:47:46,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-22 14:47:46,423 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:47:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:46,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1234001210, now seen corresponding path program 34 times [2021-11-22 14:47:46,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:46,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437097165] [2021-11-22 14:47:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:46,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 146 proven. 167 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-22 14:47:46,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:46,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437097165] [2021-11-22 14:47:46,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437097165] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:47:46,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072587863] [2021-11-22 14:47:46,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:47:46,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:46,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:47:46,826 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:47:46,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-22 14:47:46,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:47:46,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:47:46,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-22 14:47:46,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:47:47,375 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-22 14:47:47,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:47:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-22 14:47:47,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072587863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:47:47,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:47:47,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2021-11-22 14:47:47,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323344814] [2021-11-22 14:47:47,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:47:47,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-22 14:47:47,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-22 14:47:47,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2021-11-22 14:47:47,531 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:48,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:48,112 INFO L93 Difference]: Finished difference Result 176 states and 182 transitions. [2021-11-22 14:47:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-22 14:47:48,113 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-22 14:47:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:48,114 INFO L225 Difference]: With dead ends: 176 [2021-11-22 14:47:48,114 INFO L226 Difference]: Without dead ends: 92 [2021-11-22 14:47:48,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=757, Invalid=2549, Unknown=0, NotChecked=0, Total=3306 [2021-11-22 14:47:48,115 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:48,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 54 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:47:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-22 14:47:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-11-22 14:47:48,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2021-11-22 14:47:48,146 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 85 [2021-11-22 14:47:48,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:48,146 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2021-11-22 14:47:48,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.159090909090909) internal successors, (95), 44 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:48,147 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2021-11-22 14:47:48,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-22 14:47:48,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:48,147 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:47:48,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-22 14:47:48,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-22 14:47:48,348 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:47:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:48,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1730367640, now seen corresponding path program 35 times [2021-11-22 14:47:48,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:48,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426666264] [2021-11-22 14:47:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:48,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:48,808 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 121 proven. 192 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-22 14:47:48,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:48,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426666264] [2021-11-22 14:47:48,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426666264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:47:48,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847387426] [2021-11-22 14:47:48,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:47:48,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:48,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:47:48,811 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:47:48,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-22 14:47:49,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-22 14:47:49,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:47:49,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-22 14:47:49,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:47:50,331 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-22 14:47:50,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:47:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-22 14:47:50,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847387426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:47:50,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:47:50,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 69 [2021-11-22 14:47:50,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490484594] [2021-11-22 14:47:50,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:47:50,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-22 14:47:50,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:47:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-22 14:47:50,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=4061, Unknown=0, NotChecked=0, Total=4692 [2021-11-22 14:47:50,814 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:51,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:47:51,529 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2021-11-22 14:47:51,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-22 14:47:51,530 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-22 14:47:51,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:47:51,531 INFO L225 Difference]: With dead ends: 124 [2021-11-22 14:47:51,531 INFO L226 Difference]: Without dead ends: 92 [2021-11-22 14:47:51,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1173, Invalid=5967, Unknown=0, NotChecked=0, Total=7140 [2021-11-22 14:47:51,534 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 205 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:47:51,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 47 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:47:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-22 14:47:51,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2021-11-22 14:47:51,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:51,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-11-22 14:47:51,570 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2021-11-22 14:47:51,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:47:51,570 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-11-22 14:47:51,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:47:51,571 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-11-22 14:47:51,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-22 14:47:51,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:47:51,571 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:47:51,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-22 14:47:51,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-22 14:47:51,772 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:47:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:47:51,772 INFO L85 PathProgramCache]: Analyzing trace with hash 106922954, now seen corresponding path program 36 times [2021-11-22 14:47:51,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:47:51,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96473617] [2021-11-22 14:47:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:47:51,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:47:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:47:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 38 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:47:59,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:47:59,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96473617] [2021-11-22 14:47:59,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96473617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:47:59,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372774063] [2021-11-22 14:47:59,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-22 14:47:59,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:47:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:47:59,466 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:47:59,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-22 14:47:59,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-22 14:47:59,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:47:59,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 141 conjunts are in the unsatisfiable core [2021-11-22 14:47:59,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:48:00,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 14:48:13,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:48:13,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:48:13,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:48:13,278 INFO L354 Elim1Store]: treesize reduction 98, result has 44.6 percent of original size [2021-11-22 14:48:13,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 97 [2021-11-22 14:48:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 7 proven. 491 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:48:14,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:49:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 363 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-22 14:49:02,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372774063] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:49:02,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:49:02,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 69, 59] total 189 [2021-11-22 14:49:02,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301355486] [2021-11-22 14:49:02,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:49:02,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2021-11-22 14:49:02,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:49:02,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2021-11-22 14:49:02,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1243, Invalid=34289, Unknown=0, NotChecked=0, Total=35532 [2021-11-22 14:49:02,432 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 189 states, 189 states have (on average 1.1904761904761905) internal successors, (225), 189 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:49:34,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:49:34,447 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-11-22 14:49:34,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-22 14:49:34,448 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.1904761904761905) internal successors, (225), 189 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-22 14:49:34,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:49:34,448 INFO L225 Difference]: With dead ends: 125 [2021-11-22 14:49:34,448 INFO L226 Difference]: Without dead ends: 121 [2021-11-22 14:49:34,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14384 ImplicationChecksByTransitivity, 89.8s TimeCoverageRelationStatistics Valid=2842, Invalid=71960, Unknown=0, NotChecked=0, Total=74802 [2021-11-22 14:49:34,452 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 66 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 3234 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 6119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 3234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2675 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:49:34,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 270 Invalid, 6119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 3234 Invalid, 0 Unknown, 2675 Unchecked, 2.5s Time] [2021-11-22 14:49:34,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-22 14:49:34,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2021-11-22 14:49:34,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:49:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2021-11-22 14:49:34,503 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 89 [2021-11-22 14:49:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:49:34,503 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2021-11-22 14:49:34,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.1904761904761905) internal successors, (225), 189 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:49:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2021-11-22 14:49:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-22 14:49:34,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:49:34,504 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:49:34,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-22 14:49:34,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-22 14:49:34,730 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:49:34,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:49:34,730 INFO L85 PathProgramCache]: Analyzing trace with hash -273022996, now seen corresponding path program 37 times [2021-11-22 14:49:34,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:49:34,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185179441] [2021-11-22 14:49:34,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:49:34,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:49:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:49:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 171 proven. 194 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-22 14:49:35,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:49:35,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185179441] [2021-11-22 14:49:35,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185179441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:49:35,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586147221] [2021-11-22 14:49:35,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-22 14:49:35,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:49:35,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:49:35,170 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:49:35,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-22 14:49:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:49:35,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-22 14:49:35,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:49:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-22 14:49:35,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:49:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-22 14:49:36,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586147221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:49:36,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:49:36,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2021-11-22 14:49:36,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57578638] [2021-11-22 14:49:36,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:49:36,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-22 14:49:36,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:49:36,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-22 14:49:36,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2021-11-22 14:49:36,028 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:49:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:49:36,619 INFO L93 Difference]: Finished difference Result 188 states and 194 transitions. [2021-11-22 14:49:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-22 14:49:36,620 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-22 14:49:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:49:36,620 INFO L225 Difference]: With dead ends: 188 [2021-11-22 14:49:36,620 INFO L226 Difference]: Without dead ends: 98 [2021-11-22 14:49:36,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=2919, Unknown=0, NotChecked=0, Total=3782 [2021-11-22 14:49:36,621 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:49:36,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 59 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:49:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-22 14:49:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-11-22 14:49:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:49:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2021-11-22 14:49:36,664 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 91 [2021-11-22 14:49:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:49:36,664 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2021-11-22 14:49:36,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:49:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2021-11-22 14:49:36,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-22 14:49:36,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:49:36,665 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:49:36,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-22 14:49:36,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-22 14:49:36,865 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:49:36,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:49:36,866 INFO L85 PathProgramCache]: Analyzing trace with hash 521964302, now seen corresponding path program 38 times [2021-11-22 14:49:36,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:49:36,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463574849] [2021-11-22 14:49:36,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:49:36,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:49:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:49:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 144 proven. 221 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-22 14:49:37,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:49:37,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463574849] [2021-11-22 14:49:37,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463574849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:49:37,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137475162] [2021-11-22 14:49:37,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:49:37,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:49:37,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:49:37,292 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:49:37,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-22 14:49:37,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:49:37,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:49:37,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-22 14:49:37,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:49:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-22 14:49:37,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:49:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-22 14:49:38,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137475162] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:49:38,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:49:38,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2021-11-22 14:49:38,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850840869] [2021-11-22 14:49:38,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:49:38,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-22 14:49:38,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:49:38,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-22 14:49:38,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=1649, Unknown=0, NotChecked=0, Total=2162 [2021-11-22 14:49:38,054 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:49:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:49:38,574 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2021-11-22 14:49:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-22 14:49:38,574 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-22 14:49:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:49:38,575 INFO L225 Difference]: With dead ends: 132 [2021-11-22 14:49:38,575 INFO L226 Difference]: Without dead ends: 98 [2021-11-22 14:49:38,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1117, Invalid=2789, Unknown=0, NotChecked=0, Total=3906 [2021-11-22 14:49:38,576 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 175 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-22 14:49:38,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 35 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-22 14:49:38,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-22 14:49:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-11-22 14:49:38,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:49:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-11-22 14:49:38,618 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2021-11-22 14:49:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:49:38,618 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-11-22 14:49:38,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:49:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-11-22 14:49:38,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-22 14:49:38,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:49:38,619 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:49:38,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-22 14:49:38,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:49:38,820 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:49:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:49:38,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1577328112, now seen corresponding path program 39 times [2021-11-22 14:49:38,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:49:38,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148128927] [2021-11-22 14:49:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:49:38,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:49:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:49:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 81 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:49:46,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:49:46,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148128927] [2021-11-22 14:49:46,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148128927] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:49:46,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412306577] [2021-11-22 14:49:46,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:49:46,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:49:46,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:49:46,864 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:49:46,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-22 14:49:47,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-22 14:49:47,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:49:47,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 157 conjunts are in the unsatisfiable core [2021-11-22 14:49:47,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:49:48,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 14:49:48,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 14:49:48,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 14:49:48,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-22 14:50:04,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:04,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:50:05,534 INFO L354 Elim1Store]: treesize reduction 702, result has 35.1 percent of original size [2021-11-22 14:50:05,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 135 treesize of output 405 [2021-11-22 14:50:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 42 proven. 546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:50:06,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:50:27,174 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-22 14:50:27,175 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-22 14:50:27,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-22 14:50:27,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2021-11-22 14:50:27,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114384625] [2021-11-22 14:50:27,176 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-22 14:50:27,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-22 14:50:27,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:50:27,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-22 14:50:27,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2288, Invalid=28864, Unknown=0, NotChecked=0, Total=31152 [2021-11-22 14:50:27,178 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 77 states, 77 states have (on average 1.2337662337662338) internal successors, (95), 77 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:27,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:50:27,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10203 ImplicationChecksByTransitivity, 42.2s TimeCoverageRelationStatistics Valid=2288, Invalid=28864, Unknown=0, NotChecked=0, Total=31152 [2021-11-22 14:50:27,179 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1 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 [2021-11-22 14:50:27,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:50:27,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2021-11-22 14:50:27,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-22 14:50:27,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-22 14:50:27,381 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@52201626 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-22 14:50:27,385 INFO L158 Benchmark]: Toolchain (without parser) took 695766.84ms. Allocated memory was 130.0MB in the beginning and 327.2MB in the end (delta: 197.1MB). Free memory was 92.0MB in the beginning and 202.2MB in the end (delta: -110.2MB). Peak memory consumption was 86.2MB. Max. memory is 16.1GB. [2021-11-22 14:50:27,385 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 130.0MB. Free memory was 103.8MB in the beginning and 103.7MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:50:27,385 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.61ms. Allocated memory is still 130.0MB. Free memory was 91.8MB in the beginning and 102.1MB in the end (delta: -10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-22 14:50:27,385 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.33ms. Allocated memory is still 130.0MB. Free memory was 102.1MB in the beginning and 100.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:50:27,386 INFO L158 Benchmark]: Boogie Preprocessor took 48.75ms. Allocated memory is still 130.0MB. Free memory was 100.8MB in the beginning and 99.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:50:27,386 INFO L158 Benchmark]: RCFGBuilder took 269.78ms. Allocated memory is still 130.0MB. Free memory was 99.4MB in the beginning and 89.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-22 14:50:27,386 INFO L158 Benchmark]: TraceAbstraction took 695123.69ms. Allocated memory was 130.0MB in the beginning and 327.2MB in the end (delta: 197.1MB). Free memory was 88.9MB in the beginning and 202.2MB in the end (delta: -113.3MB). Peak memory consumption was 85.1MB. Max. memory is 16.1GB. [2021-11-22 14:50:27,387 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 130.0MB. Free memory was 103.8MB in the beginning and 103.7MB in the end (delta: 28.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.61ms. Allocated memory is still 130.0MB. Free memory was 91.8MB in the beginning and 102.1MB in the end (delta: -10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.33ms. Allocated memory is still 130.0MB. Free memory was 102.1MB in the beginning and 100.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 48.75ms. Allocated memory is still 130.0MB. Free memory was 100.8MB in the beginning and 99.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 269.78ms. Allocated memory is still 130.0MB. Free memory was 99.4MB in the beginning and 89.6MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 695123.69ms. Allocated memory was 130.0MB in the beginning and 327.2MB in the end (delta: 197.1MB). Free memory was 88.9MB in the beginning and 202.2MB in the end (delta: -113.3MB). Peak memory consumption was 85.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@52201626 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@52201626: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0 --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 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-22 14:50:29,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:50:29,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:50:29,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:50:29,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:50:29,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:50:29,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:50:29,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:50:29,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:50:29,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:50:29,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:50:29,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:50:29,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:50:29,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:50:29,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:50:29,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:50:29,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:50:29,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:50:29,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:50:29,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:50:29,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:50:29,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:50:29,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:50:29,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:50:29,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:50:29,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:50:29,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:50:29,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:50:29,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:50:29,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:50:29,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:50:29,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:50:29,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:50:29,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:50:29,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:50:29,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:50:29,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:50:29,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:50:29,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:50:29,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:50:29,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:50:29,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-22 14:50:29,854 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:50:29,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:50:29,858 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:50:29,859 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:50:29,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:50:29,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:50:29,862 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:50:29,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:50:29,863 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:50:29,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:50:29,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:50:29,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:50:29,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:50:29,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:50:29,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-22 14:50:29,866 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-22 14:50:29,866 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-22 14:50:29,867 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:50:29,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:50:29,867 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:50:29,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:50:29,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:50:29,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:50:29,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:50:29,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:50:29,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:50:29,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:50:29,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:50:29,870 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-22 14:50:29,870 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-22 14:50:29,871 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:50:29,871 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:50:29,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:50:29,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:50:29,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-22 14:50:29,872 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 [2021-11-22 14:50:30,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:50:30,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:50:30,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:50:30,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:50:30,320 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:50:30,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/array-crafted/zero_sum1.c [2021-11-22 14:50:30,404 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/data/66cb23056/1bf0b167e3034897bf30743dc56f25d6/FLAGc51b56e7a [2021-11-22 14:50:31,027 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:50:31,029 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/sv-benchmarks/c/array-crafted/zero_sum1.c [2021-11-22 14:50:31,037 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/data/66cb23056/1bf0b167e3034897bf30743dc56f25d6/FLAGc51b56e7a [2021-11-22 14:50:31,357 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/data/66cb23056/1bf0b167e3034897bf30743dc56f25d6 [2021-11-22 14:50:31,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:50:31,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:50:31,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:50:31,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:50:31,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:50:31,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:50:31" (1/1) ... [2021-11-22 14:50:31,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6953c4bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:50:31, skipping insertion in model container [2021-11-22 14:50:31,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:50:31" (1/1) ... [2021-11-22 14:50:31,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:50:31,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:50:31,568 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_fc40fd2c-a996-4022-949f-01cbeadc9d25/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2021-11-22 14:50:31,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:50:31,613 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:50:31,637 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_fc40fd2c-a996-4022-949f-01cbeadc9d25/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2021-11-22 14:50:31,659 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:50:31,683 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:50:31,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:50:31 WrapperNode [2021-11-22 14:50:31,687 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:50:31,688 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:50:31,688 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:50:31,688 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:50:31,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:50:31" (1/1) ... [2021-11-22 14:50:31,742 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:50:31" (1/1) ... [2021-11-22 14:50:31,774 INFO L137 Inliner]: procedures = 17, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2021-11-22 14:50:31,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:50:31,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:50:31,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:50:31,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:50:31,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:50:31" (1/1) ... [2021-11-22 14:50:31,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:50:31" (1/1) ... [2021-11-22 14:50:31,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:50:31" (1/1) ... [2021-11-22 14:50:31,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:50:31" (1/1) ... [2021-11-22 14:50:31,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:50:31" (1/1) ... [2021-11-22 14:50:31,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:50:31" (1/1) ... [2021-11-22 14:50:31,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:50:31" (1/1) ... [2021-11-22 14:50:31,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:50:31,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:50:31,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:50:31,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:50:31,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:50:31" (1/1) ... [2021-11-22 14:50:31,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:50:31,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:50:31,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:50:31,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:50:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:50:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-22 14:50:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-22 14:50:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-22 14:50:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:50:31,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:50:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-22 14:50:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 14:50:32,070 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:50:32,072 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:50:32,266 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:50:32,273 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:50:32,277 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-22 14:50:32,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:50:32 BoogieIcfgContainer [2021-11-22 14:50:32,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:50:32,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:50:32,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:50:32,298 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:50:32,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:50:31" (1/3) ... [2021-11-22 14:50:32,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c10bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:50:32, skipping insertion in model container [2021-11-22 14:50:32,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:50:31" (2/3) ... [2021-11-22 14:50:32,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69c10bcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:50:32, skipping insertion in model container [2021-11-22 14:50:32,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:50:32" (3/3) ... [2021-11-22 14:50:32,302 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum1.c [2021-11-22 14:50:32,309 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:50:32,322 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:50:32,399 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:50:32,407 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 [2021-11-22 14:50:32,407 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:50:32,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 14:50:32,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:50:32,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:50:32,428 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:50:32,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:50:32,434 INFO L85 PathProgramCache]: Analyzing trace with hash -718163050, now seen corresponding path program 1 times [2021-11-22 14:50:32,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:50:32,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702749361] [2021-11-22 14:50:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:50:32,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:50:32,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:50:32,454 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:50:32,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-22 14:50:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:50:32,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-22 14:50:32,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:50:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:50:32,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:50:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:50:32,710 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:50:32,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702749361] [2021-11-22 14:50:32,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702749361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:50:32,713 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:50:32,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-22 14:50:32,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501418971] [2021-11-22 14:50:32,718 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:50:32,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-22 14:50:32,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:50:32,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-22 14:50:32,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:50:32,779 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:50:32,801 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-11-22 14:50:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-22 14:50:32,804 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 14:50:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:50:32,815 INFO L225 Difference]: With dead ends: 35 [2021-11-22 14:50:32,816 INFO L226 Difference]: Without dead ends: 15 [2021-11-22 14:50:32,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-22 14:50:32,831 INFO L933 BasicCegarLoop]: 23 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, 23 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 [2021-11-22 14:50:32,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:50:32,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-22 14:50:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-22 14:50:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-22 14:50:32,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-11-22 14:50:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:50:32,885 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-22 14:50:32,886 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-22 14:50:32,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-22 14:50:32,887 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:50:32,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:50:32,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:50:33,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:50:33,102 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:50:33,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:50:33,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1709876828, now seen corresponding path program 1 times [2021-11-22 14:50:33,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:50:33,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076428607] [2021-11-22 14:50:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:50:33,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:50:33,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:50:33,107 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:50:33,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-22 14:50:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:50:33,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-22 14:50:33,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:50:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:50:33,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:50:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:50:33,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:50:33,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076428607] [2021-11-22 14:50:33,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076428607] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:50:33,301 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:50:33,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-22 14:50:33,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078809052] [2021-11-22 14:50:33,302 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:50:33,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-22 14:50:33,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:50:33,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-22 14:50:33,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:50:33,325 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:33,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:50:33,387 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-11-22 14:50:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:50:33,389 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-22 14:50:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:50:33,391 INFO L225 Difference]: With dead ends: 22 [2021-11-22 14:50:33,392 INFO L226 Difference]: Without dead ends: 18 [2021-11-22 14:50:33,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:50:33,395 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-22 14:50:33,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-22 14:50:33,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-22 14:50:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-22 14:50:33,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:33,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-22 14:50:33,409 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-11-22 14:50:33,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:50:33,411 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-22 14:50:33,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-22 14:50:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-22 14:50:33,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:50:33,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:50:33,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-22 14:50:33,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:50:33,627 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:50:33,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:50:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1727609346, now seen corresponding path program 1 times [2021-11-22 14:50:33,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:50:33,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462117542] [2021-11-22 14:50:33,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:50:33,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:50:33,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:50:33,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:50:33,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-22 14:50:33,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:50:33,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-22 14:50:33,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:50:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:50:33,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:50:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:50:33,850 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:50:33,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462117542] [2021-11-22 14:50:33,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462117542] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-22 14:50:33,851 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:50:33,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-22 14:50:33,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029072018] [2021-11-22 14:50:33,852 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-22 14:50:33,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:50:33,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:50:33,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:50:33,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:50:33,854 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:33,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:50:33,938 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-11-22 14:50:33,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:50:33,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-22 14:50:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:50:33,941 INFO L225 Difference]: With dead ends: 34 [2021-11-22 14:50:33,941 INFO L226 Difference]: Without dead ends: 21 [2021-11-22 14:50:33,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:50:33,943 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:50:33,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 29 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:50:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-22 14:50:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-22 14:50:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-22 14:50:33,952 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-11-22 14:50:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:50:33,952 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-22 14:50:33,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-22 14:50:33,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-22 14:50:33,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:50:33,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:50:33,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:50:34,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:50:34,168 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:50:34,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:50:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1750506814, now seen corresponding path program 1 times [2021-11-22 14:50:34,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:50:34,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [542341907] [2021-11-22 14:50:34,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:50:34,170 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:50:34,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:50:34,171 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:50:34,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-22 14:50:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:50:34,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-22 14:50:34,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:50:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:50:34,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:50:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:50:34,809 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:50:34,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [542341907] [2021-11-22 14:50:34,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [542341907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:50:34,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:50:34,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-22 14:50:34,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497040104] [2021-11-22 14:50:34,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:50:34,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-22 14:50:34,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:50:34,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-22 14:50:34,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-22 14:50:34,813 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:50:35,132 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2021-11-22 14:50:35,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-22 14:50:35,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-22 14:50:35,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:50:35,136 INFO L225 Difference]: With dead ends: 48 [2021-11-22 14:50:35,136 INFO L226 Difference]: Without dead ends: 39 [2021-11-22 14:50:35,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-22 14:50:35,139 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:50:35,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 46 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-22 14:50:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-22 14:50:35,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-11-22 14:50:35,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-22 14:50:35,161 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 17 [2021-11-22 14:50:35,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:50:35,162 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-22 14:50:35,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:35,162 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-22 14:50:35,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 14:50:35,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:50:35,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:50:35,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:50:35,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:50:35,379 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:50:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:50:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1775953350, now seen corresponding path program 1 times [2021-11-22 14:50:35,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:50:35,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585472447] [2021-11-22 14:50:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:50:35,382 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:50:35,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:50:35,383 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:50:35,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-22 14:50:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:50:35,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-22 14:50:35,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:50:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:50:35,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:50:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:50:36,090 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:50:36,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585472447] [2021-11-22 14:50:36,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585472447] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:50:36,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:50:36,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-22 14:50:36,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411409773] [2021-11-22 14:50:36,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:50:36,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-22 14:50:36,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:50:36,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-22 14:50:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-22 14:50:36,105 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:36,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:50:36,719 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2021-11-22 14:50:36,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-22 14:50:36,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-22 14:50:36,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:50:36,722 INFO L225 Difference]: With dead ends: 73 [2021-11-22 14:50:36,722 INFO L226 Difference]: Without dead ends: 65 [2021-11-22 14:50:36,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-11-22 14:50:36,725 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 121 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:50:36,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 60 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:50:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-22 14:50:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 24. [2021-11-22 14:50:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-22 14:50:36,735 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-11-22 14:50:36,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:50:36,736 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-22 14:50:36,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:36,737 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-22 14:50:36,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-22 14:50:36,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:50:36,738 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:50:36,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:50:36,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:50:36,955 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:50:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:50:36,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1965660968, now seen corresponding path program 2 times [2021-11-22 14:50:36,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:50:36,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326672930] [2021-11-22 14:50:36,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:50:36,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:50:36,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:50:36,959 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:50:36,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-22 14:50:37,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:50:37,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:50:37,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-22 14:50:37,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:50:37,548 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-22 14:50:37,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-11-22 14:50:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:50:37,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:50:40,491 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-11-22 14:50:40,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2021-11-22 14:50:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:50:46,152 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:50:46,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326672930] [2021-11-22 14:50:46,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326672930] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:50:46,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:50:46,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-11-22 14:50:46,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120924070] [2021-11-22 14:50:46,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:50:46,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 14:50:46,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:50:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 14:50:46,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=261, Unknown=1, NotChecked=0, Total=306 [2021-11-22 14:50:46,155 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:48,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 14:50:52,577 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-22 14:50:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:50:52,812 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-11-22 14:50:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 14:50:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-22 14:50:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:50:52,814 INFO L225 Difference]: With dead ends: 36 [2021-11-22 14:50:52,814 INFO L226 Difference]: Without dead ends: 32 [2021-11-22 14:50:52,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=54, Invalid=325, Unknown=1, NotChecked=0, Total=380 [2021-11-22 14:50:52,816 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-22 14:50:52,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 90 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 180 Invalid, 2 Unknown, 5 Unchecked, 4.5s Time] [2021-11-22 14:50:52,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-22 14:50:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-11-22 14:50:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2021-11-22 14:50:52,829 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2021-11-22 14:50:52,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:50:52,830 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2021-11-22 14:50:52,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:52,830 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2021-11-22 14:50:52,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-22 14:50:52,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:50:52,831 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:50:52,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-22 14:50:53,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:50:53,047 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:50:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:50:53,048 INFO L85 PathProgramCache]: Analyzing trace with hash -732186678, now seen corresponding path program 3 times [2021-11-22 14:50:53,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:50:53,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974465688] [2021-11-22 14:50:53,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:50:53,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:50:53,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:50:53,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:50:53,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-22 14:50:53,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-22 14:50:53,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:50:53,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 14:50:53,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:50:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:50:53,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:50:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-22 14:50:53,953 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:50:53,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974465688] [2021-11-22 14:50:53,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974465688] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:50:53,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:50:53,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-11-22 14:50:53,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120726055] [2021-11-22 14:50:53,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:50:53,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-22 14:50:53,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:50:53,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-22 14:50:53,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-22 14:50:53,956 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:50:54,486 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-11-22 14:50:54,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-22 14:50:54,488 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-22 14:50:54,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:50:54,488 INFO L225 Difference]: With dead ends: 56 [2021-11-22 14:50:54,489 INFO L226 Difference]: Without dead ends: 32 [2021-11-22 14:50:54,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-11-22 14:50:54,490 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:50:54,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 45 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:50:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-22 14:50:54,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-22 14:50:54,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:54,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-11-22 14:50:54,497 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 25 [2021-11-22 14:50:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:50:54,497 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-11-22 14:50:54,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:54,498 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-11-22 14:50:54,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 14:50:54,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:50:54,499 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:50:54,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-22 14:50:54,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:50:54,711 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:50:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:50:54,712 INFO L85 PathProgramCache]: Analyzing trace with hash 368620396, now seen corresponding path program 4 times [2021-11-22 14:50:54,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:50:54,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374839170] [2021-11-22 14:50:54,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-22 14:50:54,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:50:54,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:50:54,714 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:50:54,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-22 14:50:54,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-22 14:50:54,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:50:54,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-22 14:50:54,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:50:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:50:55,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:50:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-22 14:50:55,573 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-22 14:50:55,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374839170] [2021-11-22 14:50:55,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374839170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:50:55,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-22 14:50:55,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-22 14:50:55,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978460186] [2021-11-22 14:50:55,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-22 14:50:55,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-22 14:50:55,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-22 14:50:55,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-22 14:50:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-11-22 14:50:55,577 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:56,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:50:56,170 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-11-22 14:50:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-22 14:50:56,171 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-22 14:50:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:50:56,172 INFO L225 Difference]: With dead ends: 67 [2021-11-22 14:50:56,172 INFO L226 Difference]: Without dead ends: 55 [2021-11-22 14:50:56,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2021-11-22 14:50:56,174 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 176 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:50:56,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 45 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-22 14:50:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-22 14:50:56,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2021-11-22 14:50:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-22 14:50:56,181 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-11-22 14:50:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:50:56,182 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-22 14:50:56,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:50:56,182 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-22 14:50:56,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-22 14:50:56,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:50:56,183 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:50:56,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-22 14:50:56,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 [2021-11-22 14:50:56,396 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:50:56,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:50:56,397 INFO L85 PathProgramCache]: Analyzing trace with hash 996931278, now seen corresponding path program 5 times [2021-11-22 14:50:56,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-22 14:50:56,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480808524] [2021-11-22 14:50:56,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-22 14:50:56,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-22 14:50:56,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat [2021-11-22 14:50:56,399 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-22 14:50:56,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc40fd2c-a996-4022-949f-01cbeadc9d25/bin/uautomizer-w2VwFs6gM0/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-22 14:50:58,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-22 14:50:58,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:50:58,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-22 14:50:58,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:50:59,098 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-22 14:50:59,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 30 [2021-11-22 14:50:59,209 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-22 14:50:59,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:51:05,556 INFO L354 Elim1Store]: treesize reduction 114, result has 46.0 percent of original size [2021-11-22 14:51:05,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 125